Rail crane kb 408.21
November 21, 2015
The KB-408 tower crane is a special rail-mounted technique used for mechanization construction works, at a height of up to 72.7 meters and with loads up to 10 tons.
Tower crane KB-408 is a construction mobile full-revolving rail crane with a slewing tower and girder boom with a cargo trolley that provides vertical and horizontal transportation of building parts and materials. The crane is transported from object to object disassembled. Installation is carried out by our own mechanisms and with the help of a truck crane.
Tower crane KB-408
The KB408 crane belongs to the 4th size group of tower cranes and has the same main units with cranes of this group.
Sectional boom design. The design of the crane boom is made of metal pipes in the form of a lattice structure, the boom modules are interconnected using flange connections. Crane KB 408 can be mounted with an inclined boom. The reach is changed by moving the carriage.
The crane tower has a modular design. The number of tower modules on KB-408 cranes varies from 2 to 5 pieces. (depending on the version of the crane).
Turntable and swivel mechanism
The KB-408 platform is identical in design to the KB-160. The design of the rotary mechanism has been changed - it looks like a roller circle (in one row) with a diameter of 2500 mm. In addition, winches, blocks and electrical equipment for the cargo trolley appeared on the crane.
Running frame with swivel vanes
Running frame with rotary weathercocks, portal. Similar to the KB-401 and KB-402 series.
Portal
The design of the portal and the frame of the KB-408 crane is identical to the design of the KB-160 cranes.
tower sections
inventory sections. Quantity on taps from 2 to 5 (6) pcs. (depending on the version of the crane).
Tower
By design, the tower is unified with some units of the KB-160 crane, with the exception of the design and equipment of the tower head. It differs in the length of the chain hoist ropes and the maximum possible number of installed inventory sections, as well as the design of the head section of the tower has been changed - now it has become collapsible.
control cabin
On this crane a unified cabin for high cranes is installed (installation at a height of over 20 m). On the base, first-born model, a unified cab for low cranes is installed (installation at a height of up to 20 m).
Mounting methods are similar to KB-160, as well as other series of cranes from the KB type.
It differs from the cabin of the basic model in a more advanced design, adapted for convenient viewing at a higher crane height, and also differs in internal filling and equipment - improved insulation and heating panels. Additionally, it can be equipped with air conditioning.
Crane Boom
The design of the main boom is sectional. Made of metal pipes in the form of a lattice structure, the sections are interconnected using flange connections. A cargo trolley with a hook clip moves along the boom. The reach is changed by tilting the boom, as well as by moving the cargo trolley.
hook block
The hook cage is a two-axle suspension: two cheeks, two axles, on which blocks, traverses and a hook are installed on ball bearings. Additionally, there are metal outer protective covers for hook block blocks.
Technical characteristics of the tower crane KB-408
Tower crane KB-408
| Crane total weight (in working order), t | 95,2 |
| Maximum load capacity, t | 10,0 |
| Load capacity at maximum boom outreach, t | 6,0 |
| Boom radius, m | 6,0-30,0 |
| Departure at maximum load capacity, m | 16,0 |
| Load moment, (kNm) tm | 160,0 |
| Maximum lifting height, m (horizontal boom / inclined boom) | 46,6 / 57,8 |
| Total power el. engines, kW | 123,6 |
| Lowering depth, m | 5,0 |
| Rotation frequency tower crane, rpm | 0,65 |
| Structural weight of the crane, t | 54,8 |
| Load lifting speed max. mass, m/min | 36,0 |
| Maximum load lifting speed, m/min | 67,0 |
| Speed of smooth landing of cargo, m/min | 4,8 |
| Cargo trolley travel speed, m/minghorizontal boom/inclined boom | 7,0 / 30,0 |
| Crane travel speed, m/min | 18,0 |
| Base, m | 6,0 |
| Track, m | 6,0 |
| Rear clearance, m | 4,35 |
| The smallest radius of curvature of the track (inner rail), m | 12,0 |
Source: http://tpscom.ru/bashennyj-kran-kb-408
Overview of the tower crane KB-408
Used in the construction of 16-storey buildings for various purposes, the KB-408 tower crane has gained popularity due to its ease of operation and well-thought-out safety.
What device does this model of lifting equipment have? What are its main features and specifications? How is the KB-408 tower crane operated? How much does a new and used model of this equipment cost? We will consider these and other questions in the article.
Device
This model is included in the V category of cranes, its design coincides with similar models of this group.
The lift mechanism is arranged section by section by means of iron profiles welded in the form of a lattice. To change the overhang: increase or decrease it, move the carriage.
The design of the KB-408 forklift consists of:
- rotary single-row device, platform;
- portal;
- telescopic turret rotating 180 degrees;
- operator cabins;
- beam-type booms with a cargo trolley, with the help of which the load can be lifted in both directions: up and down;
- running frame;
- additional details.
Rotary: single row device, platform
The portal is installed on top of the platform, where there are also 2 types of winches:
At the rear of the platform, a counterweight is mounted in the form of 10 reinforced concrete blocks., thanks to them the rotary mechanism does not sway during transfer.
Braces and racks are mounted in trussed elements.
The platform has a base, attached to the running gear by means of a turntable.
Recently, there have been design changes in KB-408, with regard to the structure of the rotary device, outwardly it looks like a circle with a diameter of 2500 mm.
Additional parts - support hinge, working struts and other elements.
Portal
The portal is arranged in the form of a tetrahedron. On both sides it is open to the movement of parts of the tower. It rests on a trussed element, telescopic struts. Created from 2 trihedrons. Between them, fastening occurs with the help of beams having the shape of a box.
It is through the portal that the process of increasing the height, a stable position in the space of the tower is possible.
It has a roller mechanism located in two rows and four locking elements that can keep the tower from falling during the installation of the crane.
Tower
The design of the tower is similar to that of the K-160. Represents:
- headroom,
- inventory, head sections,
- spacers.
headroom
Element of the tower, arranged like a lattice of metal. It has racks, stairs, platforms.
At the very top of the head, a boom bracing, a cargo rope are attached. There is a device for removing lightning, an anemometer.
head section
Blocks of two ropes are attached to it for moving carts and goods. A signal fire is installed at the top, and buffer stops for carts are installed at the bottom.
control cabin
The device rests on special mounts at the top of the tower. It is a cabin for cranes operating at a height of no more than 20 meters. Compared to its predecessor, K-160 has improved technical devices, heating panels.
girder boom
Individual structural elements are welded and interlocked by means of flange parts. The elements themselves are made of metal. On them there is a movement of the cart moving the load. With the help of the latter, the boom departure is changed.
Running frame
On a structure with dimensions of 7.5 x 7.5 meters (four-ring frame) there are rotating weather vanes on which the carts are held. A knife switch is held on the undercarriage of the crane.
Weathercocks have two states:
Crane trolleys - 4. A couple of them use an electric drive, the rest do not.
Rails for KB-408 can be used in two types:
The features of these mechanisms are in the position of the main control carts. On a straight rail type - everything is on the same axis. On rounded - outside the center of the rounding.
Additional details
As additional parts, KB-408 has various elements: a brace, a hook part and a mounting device and other fasteners:
cargo winch has in its device a drum mechanism, brakes, gearbox, engine. They stay on the platform. Fastening to the latter occurs with four screws. Purpose of the winch - vertical movement of freight.
trolley winch, the constituent elements are the same. Motor with two speeds, provide precise targeting of the load over the installation area.
Telescopic strut constructed from pipes of different diameters, nested one inside the other. They provide balance and hold the tower when installed on the platform.
Crane strut in the form of a triangle, attached to the top of the tower. Assists in setting up the tower and deflecting the bail line away from the tower. On the spacer there are 4 axle blocks, a quickdraw, a rope part for moving loads, a device for mounting a load sensor.
The crane is transported in a disassembled state, it is mounted on site using the available mounting devices.
The movement of the crane is carried out by means of a rail mechanism. KB-408 have counterweights to the tower, located under the latter.
In order to increase the maximum height of the lift to 77 meters, the boom is tilted at an angle of 30 degrees. The boom reach to the maximum in this case will be only 50 meters, the load capacity, however, in this case is only one and a half tons.
For maintenance of KB-408 there is a platform fixed to the base of the boom.
Specifications
| Load moment, max, t | 1800 |
| Carrying capacity, max reach, tons | 6,3 |
| Carrying capacity, max t | 10 |
| Load capacity, for each boom section, t | 3 |
| Length (horizontal boom), max/min, m | 32/4,5 |
| Length (overhead boom), max/min, m | 26,6/4,2 |
| Height (horiz. boom), max, m | 54 |
| Height (overhead boom), max, m | 72,7 |
| Length (moving down), m | 5 |
| Speed (load lifting), max height, m/min. | 30 |
| Speed (load down), m/min. | 4,8 |
| Trolley speed (with load), m/min. | 30 |
| V crane, m/min. | 12,8 |
| Rotation, m/min. | 0,65 |
| Base length, m | 7,5 |
| Track length, m | 7,5 |
| Curve radius, min | 12 |
| Power, kWt | 77,6 |
| Power of a cargo winch with a horizontal boom, kW | 55 |
| Power of a cargo winch with an inclined boom, kW | 30 |
| Rotary device power, kW | 7 |
| Power of the device that moves the crane along the rails, kW | 11 |
| Boom winch power, kW | 15 |
| Structural mass | 54,8 |
| Weight of counterweight | 40,4 |
| total weight | 95,2 |
The design of the beam boom allows you to more smoothly direct the load to the installation site.
The tower crane is controlled using special software and hardware located in the cab, in particular, controllers and radio-controlled consoles.
Switching landing and lifting speed is done by means of a single switch.
This crane is distinguished by thirteen versions, only the boom outreach values (20, 30, 35), respectively, the load capacity and the lifting and lowering values differ.
The beam boom is mounted at an angle, such as 43 degrees and 30 degrees.
The crane has:
- control mechanism self-diagnosis system,
- remote control via GPRS,
- touch control,
- frequency control of motors.
The cabin air conditioning system is also sold separately.
Additions in the equipment of the crane:
- Heating in the cab. The crane can work successfully both at +40℃ and -40℃. Since its purpose is for the IV zone. Accordingly, it has a well-heated operator's cabin.
- load cell. The lifting mechanism is equipped with a load control sensor, thanks to which the main components of the system are monitored.
- Control of the movement of cargo elements. Thanks to a special device (frequency), the movement of concrete slabs and other goods occurs smoothly and without interference.
- Cabin temperature control. Thanks to the modern electronic filling of the cabin, the temperature is regulated.
- Safety system in case of rope break, (shock absorber, coupler). Works and holds the boom when the rope breaks.
Cost of new and used equipment
In Russia, you can buy a new KB-408 crane at a price of at least 7–10 million rubles. from the manufacturer of the Nyazepetrovsky Crane Plant. A beam boom 40-50 m long can also be supplied with the crane.
At the request of the buyer, the seller company can equip the cabin with a modern air conditioning system, which undoubtedly plays in favor of this model of technology.
Equipment from 2005 can be found at a cost of 4.5 million rubles. Newer forklifts will cost more. It is also widely practiced to rent tower cranes from 800 rubles. at one o'clock.
Thus, the KB-408 model among its counterparts is in the forefront in terms of technical equipment and carrying capacity. It has a relatively inexpensive price on the market, has a lot of positive feedback among contractors. If the choice is about high-quality lifting equipment, then, definitely, you should take a closer look at the KB-408 tower crane.
You can watch a video of the operation of the KB-408 tower lifting and cargo mechanism here:
Please select a piece of text and press Ctrl+Enter.
Source: http://spez-tech.com/tehnika/stroitelnaya/kranyi/bashennii/kb/obzor-408.html
Design features of the crane model KB-408
- Main operating parameters of the model
- Machine structure
The KB408 tower crane on rails is used for the mechanization of many works during construction.
This model has gained great popularity due to the carefully thought-out design, which ensures not only its efficiency, but also safety.
The high carrying capacity of KB-408 makes it possible to carry out the installation of elements of buildings and structures, move bulky machinery or equipment to a given distance.
Main operating parameters of the model
Technical characteristics of the crane KB-408 are presented in the following table:
| load capacity | 10 t. |
| The value of the load capacity at the longest reach | 6000 kg |
| Departure range | 6-30 m |
| Departure taking into account the maximum load capacity | 1600 cm |
| Load moment | 160 tons |
| Lifting height horizontal boom | 46600 mm |
| Boom lifting height | 57800 mm |
| Weight of the machine in working order | 95.2 tons |
| Structural mass | 54.8 tons |
| Engine power (total) | 123.6 kW |
| Lowering depth | 5000 mm |
| Rotational speed KB-408 | 0.65 rpm |
| Lifting speed for the heaviest loads | 36 m/min |
| Maximum lifting speed | 67 m/min |
| Optimum smooth lowering speed | 4.8 m/min |
| Platform movement speed | 7–30 m/min |
| Travel speed | 18 m/min |
| Base | 6000 mm |
| Track | 6000 mm |
| Optimum inner radius of curvature of paths | 1200 cm |
Machine structure
The device of the KB-408 crane is quite simple, which ensures its reliable operation and the absence of difficulties in operation.
The device of the rotary mechanism and platform
The turntable KB-408 is equipped with a portal and fixed on it shooting and cargo winches. In its rear part there is a counterweight, which is ten massive reinforced concrete blocks. It prevents the KB-408 tower crane from swinging during the movement of goods, which ensures a high level of safety.
The swivel mechanism has the form of a roller circle with a diameter of 250 cm. On the platform there are also blocks, electrical equipment for controlling the operation of the cargo trolley.
Running frame
Fixation of cargo trolleys is provided by special rotary weathercocks (two pieces). The design of the running frame implies the presence of a knife switch. The position of the wind vanes can be adjusted. They can be moved to working or transport position.
The KB408 crane is equipped with four transport trolleys. Two of them work due to the presence of an electric drive. The rail mechanism of this model can be rounded or straight.
tower sections
Tower crane KB-408 is equipped with several inventory sections of the tower, which depends on the version of the model. Their number ranges from 2 to 6.
Turret section KB-408 (reinforced)
Description of the tower
The design of the tower crane KB408 is in many ways similar to another model - KB-160. It differs only in the features of equipping the head, the possibility of installing a larger number of inventory sections.
Cabin Description
The tower crane KB-408 has a comfortable cabin, which is installed at a height of twenty meters or more. It features a carefully crafted design. The cab provides a comfortable view from a considerable height. It is insulated and equipped with heating panels, which ensures the convenience of the driver in any weather.
View from the cabin of the tower crane KB-408.21
Boom design
The boom of the KB408 crane is a structure consisting of steel pipes in the form of a lattice. Sections are interconnected by means of flange fasteners. A cargo platform equipped with a hook clip moves along the boom. To increase or decrease the overhang, the angle of inclination of the boom mechanism changes.
hook block
This element of the machine is a suspension. There are casings made of metal to protect the blocks.
Source: https://SpecNavigator.ru/kran/kb-408.html
Overview of the device and the main characteristics of the tower crane KB-408
Tower crane KB-408 is a mobile full-revolving rail-mounted crane equipped with a slewing tower, a cargo compartment and a beam boom. The design features of special equipment allow it to be used in industrial construction for vertical and horizontal transportation of building materials and parts weighing up to 10 tons.
Design features of special equipment
The running frame of the KB-408 tower installation is traditional for this series of special equipment. The design is equipped with swivel-type weathercocks and a portal, the idea of which was borrowed from the previous model of this series - the KB-160 crane installation.
The equipment of the tower is unified with elements of similar truck cranes of the KB model range. Significant changes the designers introduced the head of the KB-408 turret into the device. The difference from previous models lies in the size of the chain hoist ropes and the total number of inventory sections (depending on the modification - from 2 to 6 pcs.).
It is also worth noting that the head section of the KB-408 tower is subject to disassembly, which greatly simplifies the transportation of special equipment to the construction site.
The KB-408 control cabin is designed specifically for a high crane, which implies its placement at a height of more than 20 m. The installation methods for this structural element are traditional for installations of this line. The improved cab of the KB-408 tower crane differs from the base model by the following advantages:
Crane control cabin KB-408
- ergonomic design;
- modern security system;
- wide view;
- innovative heating panels;
- air conditioner.
The main boom of the KB sectional type is made of high-strength metal pipes, the arrangement of which creates a lattice structure, the sections of which are securely connected by flange fasteners.
A cargo cart is fixed on the boom, the movement of which is regulated by inclination.
The hook clip of the tower crane is made in the form of a two-axle suspension. The design consists of a pair of cheeks and axles on which traverses, hooks and blocks are mounted. The structure is equipped with casings to protect the hook block blocks.
Technical parameters of KB-408
High carrying capacity and productivity of the equipment are due to the technical characteristics, detailed description which are given in the table.
| KB-408 parameter | Index |
| Total weight of equipment (when fully equipped), t | 95,2 |
| Load capacity at minimum/maximum outreach, t | 10/6 |
| Boom radius, m | 6-30 |
| Boom reach at maximum load, m | 16 |
| Load moment, kNm | 160 |
| Maximum lift of inclined/horizontal boom, m | 57,8/46,6 |
| Power of electric motors, kW | 123,6 |
| Lowering, m | 5 |
| Crane circulation speed, rpm | 0,65 |
| Crane weight, t | 54,8 |
| Lifting speed maximum, m/min. | 36-67 |
| Landing speed, m/min. | 4,8 |
| Cargo trolley movement speed (horizontal/inclined boom), m/min. | 7/30 |
| Speed of movement of crane installation, m/min. | 18 |
| Base / rear clearance / track, m | 6,0/4,35/6,0 |
| Minimum radius of curvature of the trajectory, m | 12 |
Lifting characteristics of the tower crane KB-408
Features of transportation and crane control
To transport a full swing crane to the construction site, the boom, cargo trolley and other large structural elements are dismantled. With the help of rolling carts, inventory compartments, reinforced concrete ballast plates and an arrow are moved to the construction site.
Requirements for the organization and performance of crane installation
For transportation and the possibility of further control of the crane KB-408 prerequisite is the permission of the State traffic inspectorate.
As a result of coordinating the procedure for transporting and operating equipment with the relevant authorities, permission is obtained to leave and use the crane.
In some cases, in accordance with the traffic rules, an escort car may be issued.
Only a qualified crane operator who has the appropriate education, has the skills to work with special equipment, knows the structure of the installation and the rules of conduct in emergency situations is allowed to operate the KB-408 crane.
on the subject: Installation of a tower crane KB-408
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Source: https://avtokrany.guru/vidy/bashennye/kb-408
Tu 4835-007-00239913-08 tower crane kb-408.21a
Tu 4835-007-00239913-08
Validity unlimited
Real specifications apply to the tower crane KB-408.21 with a lifting capacity of up to 10 tons inclusive and a hook lifting height of up to 77.7 m inclusive, designed for mechanization of construction and installation work in residential and civil construction.
The basic model of the crane and its execution can also be used for maintenance of warehouses and landfills, for mechanization of work in industrial, energy, transport and other types of construction, subject to the indicators of the operating mode.
The tower crane should be manufactured in climatic design U1 for operation in areas with ambient temperature from plus 40 to minus 40 °C according to GOST 15150-69.
Wind loads according to GOST 1451-77. Wind area of operation of the crane - I-III. Permissible maximum speed wind for:
- operating condition of the crane (taking into account gusts of wind) corresponding to the threshold of operation of the anemometer installed on the crane - 15 m/s (with 2-minute averaging);
- idle state of the crane at a height of 10 m - 27 m / s.
The crane is available in 24 versions with different lifting heights and outreach depending on the number of tower and boom sections, which are shown in Table 1.
Table 1
| Execution | Boom lifting height, m | Height to boom hinge, m | Number of tower sections | Departure, m | Number of boom sections | |
| horizontal | oblique | |||||
| 00 (base) | 54,0 | 67,7 | 56,6 | 8 | 30 | 5 |
| 01 | 54,0 | 70,2 | 56,6 | 8 | 35 | 6 |
| 02 | 54,0 | 72,7 | 56,6 | 8 | 40 | 7 |
| 03 | 48,4 | 62,1 | 51,0 | 7 | 30 | 5 |
| 04 | 48,4 | 64,6 | 51,0 | 7 | 35 | 6 |
| 05 | 48,4 | 67,1 | 51,0 | 7 | 40 | 7 |
| 06 | 42,8 | 56,5 | 45,4 | 6 | 30 | 5 |
| 07 | 42,8 | 59,0 | 45,4 | 6 | 35 | 6 |
| 08 | 42,8 | 61,5 | 45,4 | 6 | 40 | 7 |
| 09 | 37,2 | 50,9 | 39,8 | 5 | 30 | 5 |
| 10 | 37,2 | 53,4 | 39,8 | 5 | 35 | 6 |
| 11 | 37,2 | 55,9 | 39,8 | 5 | 40 | 7 |
| 12 | 31,6 | 45,3 | 34,2 | 4 | 30 | 5 |
| 13 | 31,6 | 47,8 | 34,2 | 4 | 35 | 6 |
| 14 | 31,6 | 50,3 | 34,2 | 4 | 40 | 7 |
| 15 | 54,0 | 75,2 | 56,2 | 8 | 45 | 8 |
| 16 | 54,0 | 77,7 | 56,2 | 8 | 50 | 8 |
| 17 | 48,4 | 69,6 | 50,6 | 7 | 45 | 8 |
| 18 | 48,4 | 72,1 | 50,6 | 7 | 50 | 8 |
| 19 | 42,8 | 64,0 | 45,0 | 6 | 45 | 8 |
| 20 | 42,8 | 66,5 | 45,0 | 6 | 50 | 8 |
| 21 | 37,2 | 58,4 | 39,4 | 5 | 45 | 8 |
| 22 | 37,2 | 60,9 | 39,4 | 5 | 50 | 8 |
| 23 | 31,6 | 52,8 | 33,8 | 4 | 45 | 8 |
| 24 | 31,6 | 55,3 | 33,8 | 4 | 50 | 8 |
An example of designation when ordering a tower crane:
tower crane KB-408.21A U1 TU 4835-007-002399113-2008;
tower crane KB-408.21A-13 U1 TU 4835-007-002399113-2008.
Used in the construction of 16-storey buildings for various purposes, the KB-408 tower crane has gained popularity due to its ease of operation and well-thought-out safety.
What device does this model of lifting equipment have? What are its main features and specifications? How is the KB-408 tower crane operated? How much does a new and used model of this equipment cost? We will consider these and other questions in the article.
Device
This model is included in the V category of cranes, its design coincides with similar models of this group.
The lift mechanism is arranged section by section by means of iron profiles welded in the form of a lattice. To change the overhang: increase or decrease it, move the carriage.
The design of the KB-408 forklift consists of:
- rotary single-row device, platform;
- portal;
- telescopic turret rotating 180 degrees;
- operator cabins;
- beam-type booms with a cargo trolley, with the help of which the load can be lifted in both directions: up and down;
- running frame;
- additional details.
Rotary: single row device, platform
The portal is installed on top of the platform, where there are also 2 types of winches:
- rifle,
- cargo.
At the rear of the platform, a counterweight is mounted in the form of 10 reinforced concrete blocks., thanks to them the rotary mechanism does not sway during transfer.
Braces and racks are mounted in trussed elements.
The platform has a base, attached to the running gear by means of a turntable.
Recently, there have been design changes in KB-408, with regard to the structure of the rotary device, outwardly it looks like a circle with a diameter of 2500 mm.
Additional parts - support hinge, working struts and other elements.
Portal
The portal is arranged in the form of a tetrahedron. On both sides it is open to the movement of parts of the tower. It rests on a trussed element, telescopic struts. Created from 2 trihedrons. Between them, fastening occurs with the help of beams having the shape of a box.
It is through the portal that the process of increasing the height, a stable position in the space of the tower is possible.
It has a roller mechanism located in two rows and four locking elements that can keep the tower from falling during the installation of the crane.
Tower
The design of the tower is similar to that of the K-160. Represents:
- headroom,
- inventory, head sections,
- spacers.
headroom
Element of the tower, arranged like a lattice of metal. It has racks, stairs, platforms.
At the very top of the head, a boom bracing, a cargo rope are attached. There is a device for removing lightning, an anemometer.
head section
Blocks of two ropes are attached to it for moving carts and goods. A signal fire is installed at the top, and buffer stops for carts are installed at the bottom.
control cabin
The device rests on special mounts at the top of the tower. It is a cabin for cranes operating at a height of no more than 20 meters. Compared to its predecessor, K-160 has improved technical devices, heating panels.
girder boom
Individual structural elements are welded and interlocked by means of flange parts. The elements themselves are made of metal. On them there is a movement of the cart moving the load. With the help of the latter, the boom departure is changed.
Running frame
On a structure with dimensions of 7.5 x 7.5 meters (four-ring frame) there are rotating weather vanes on which the carts are held. A knife switch is held on the undercarriage of the crane.
Weathercocks have two states:
- transport;
- working.
Crane trolleys - 4. A couple of them use an electric drive, the rest do not.
Rails for KB-408 can be used in two types:
- rounded;
- straight.
The features of these mechanisms are in the position of the main control carts. On a straight rail type - everything is on the same axis. On rounded - outside the center of the rounding.
Additional details
As additional parts, KB-408 has various elements: a brace, a hook part and a mounting device and other fasteners:
cargo winch has in its device a drum mechanism, brakes, gearbox, engine. They stay on the platform. Fastening to the latter occurs with four screws. Purpose of the winch - vertical movement of freight.
trolley winch, the constituent elements are the same. Motor with two speeds, provide precise targeting of the load over the installation area.
Telescopic strut constructed from pipes of different diameters, nested one inside the other. They provide balance and hold the tower when installed on the platform.
Crane strut in the form of a triangle, attached to the top of the tower. Assists in setting up the tower and deflecting the bail line away from the tower. On the spacer there are 4 axle blocks, a quickdraw, a rope part for moving loads, a device for mounting a load sensor.
The crane is transported in a disassembled state, it is mounted on site using the available mounting devices.
The movement of the crane is carried out by means of a rail mechanism. KB-408 have counterweights to the tower, located under the latter.
In order to increase the maximum height of the lift to 77 meters, the boom is tilted at an angle of 30 degrees. The boom reach to the maximum in this case will be only 50 meters, the load capacity, however, in this case is only one and a half tons.
For maintenance of KB-408 there is a platform fixed to the base of the boom.
Specifications
| Load moment, max, t | 1800 |
| Carrying capacity, max reach, tons | 6,3 |
| Carrying capacity, max t | 10 |
| Load capacity, for each boom section, t | 3 |
| Length (horizontal boom), max/min, m | 32/4,5 |
| Length (overhead boom), max/min, m | 26,6/4,2 |
| Height (horiz. boom), max, m | 54 |
| Height (overhead boom), max, m | 72,7 |
| Length (moving down), m | 5 |
| Speed (load lifting), max height, m/min. | 30 |
| Speed (load down), m/min. | 4,8 |
| Trolley speed (with load), m/min. | 30 |
| V crane, m/min. | 12,8 |
| Rotation, m/min. | 0,65 |
| Base length, m | 7,5 |
| Track length, m | 7,5 |
| Curve radius, min | 12 |
| Power, kWt | 77,6 |
| Power of a cargo winch with a horizontal boom, kW | 55 |
| Power of a cargo winch with an inclined boom, kW | 30 |
| Rotary device power, kW | 7 |
| Power of the device that moves the crane along the rails, kW | 11 |
| Boom winch power, kW | 15 |
| Structural mass | 54,8 |
| Weight of counterweight | 40,4 |
| total weight | 95,2 |
How to manage
The design of the beam boom allows you to more smoothly direct the load to the installation site.
The tower crane is controlled using special software and hardware located in the cab, in particular, controllers and radio-controlled consoles.
Switching landing and lifting speed is done by means of a single switch.
This crane is distinguished by thirteen versions, only the boom outreach values (20, 30, 35), respectively, the load capacity and the lifting and lowering values differ.
The beam boom is mounted at an angle, such as 43 degrees and 30 degrees.
The crane has:
- control mechanism self-diagnosis system,
- remote control via GPRS,
- touch control,
- frequency control of motors.
The cabin air conditioning system is also sold separately.
Additions in the equipment of the crane:
- Heating in the cab. The crane can work successfully both at +40℃ and -40℃. Since its purpose is for the IV zone. Accordingly, it has a well-heated operator's cabin.
- load cell. The lifting mechanism is equipped with a load control sensor, thanks to which the main components of the system are monitored.
- Control of the movement of cargo elements. Thanks to a special device (frequency), the movement of concrete slabs and other goods occurs smoothly and without interference.
- Cabin temperature control. Thanks to the modern electronic filling of the cabin, the temperature is regulated.
- Safety system in case of rope break, (shock absorber, coupler). Works and holds the boom when the rope breaks.
Cost of new and used equipment
In Russia, you can buy a new KB-408 crane at a price of at least 7–10 million rubles. from the manufacturer of the Nyazepetrovsky Crane Plant. A beam boom 40-50 m long can also be supplied with the crane.
At the request of the buyer, the seller company can equip the cabin with a modern air conditioning system, which undoubtedly plays in favor of this model of technology.
Equipment from 2005 can be found at a cost of 4.5 million rubles. Newer forklifts will cost more. It is also widely practiced to rent tower cranes from 800 rubles. at one o'clock.
Thus, the KB-408 model among its counterparts is in the forefront in terms of technical equipment and carrying capacity. It has a relatively inexpensive price on the market, has a lot of positive reviews among contractors. If the choice is about high-quality lifting equipment, then, definitely, you should take a closer look at the KB-408 tower crane.
You can watch a video of the operation of the KB-408 tower lifting and cargo mechanism here:
The considered tower crane is one of the most demanded on domestic market: in November 2017, the thousandth copy of the model was assembled. Due to what design features and specifications KB-408.21 keeps the lead?
The manufacturer of tower cranes KB-408.21 is Crane Technologies LLC (the equipment is produced under the GIRAFFE brand). Note that a more modern version of the name of this model is SMK-10.200, but the double index continues to be used on the official website of the company.
The progenitor of the model manufactured today can be called the KB-160 (KB-401) crane, which was launched into production in the late 60s. Initially, the assembly of KB-408.21 was carried out at the Moscow Crane Plant "Severyanin" (from 1998 to 2001), but then the company completely stopped the production of this type of equipment. Since 2002, production has been launched at the Nyazepetrovsky Crane Plant (owned by Crane Technologies LLC).
Note that the design of the tower crane has undergone significant changes over the years. Already at the time of the transfer of production of KB-408.21 to Nyazepetrovsk, the configuration of the cabin and electrical cabinets was changed. Technique produced on different factories, and had a number of other differences.
Photo source: giraffecrane.ru
Specifications KB-408.21
SMK-10.200 (previously - KB-408.21) is a rail crane with a turret and beam boom with a cargo trolley, designed for the construction of structures, the height of which can reach 72.7 m. The permissible mass of mounted elements is 10 tons. Transportation of materials is carried out vertically and horizontally. Installation of equipment is carried out using a truck crane, as well as the model's own mechanisms.
The design of the crane KB-408.21 provides for a safety device of the fourth generation with a coordinate protection system. It includes a control system self-diagnosis module. Interface - touch graphic. By special order, remote diagnostics via GPRS is offered.
To work in cold weather, there is a heating system in the crane cabin. You can also order air conditioning.
Modifications
The manufacturer offers 15 versions of the tower crane KB-408.21 (an index from 00 to 14 is added to the name). The most "running" version is KB-408.21-02.
Photo source: giraffecrane.ru
Among the technical characteristics, which differ depending on the modification of the crane, is the load capacity at the maximum reach (it can be 3; 3.5 or 5 tons). The maximum load moment is respectively limited to 160, 180 or 200 tm. But here it is worth saying that for 3-ton versions the maximum reach reaches 40 m, and for 5-ton versions - 30 m. But by additional order, it is possible to install arrows with a length of 45 and 50 m. is 10 t, allowed at a reach of 16, 18 or 20 m.
Let us dwell in more detail on the characteristics of the tower crane KB-408.21-02.
Scheme KB-408.21
Graph of the lifting capacity of a tower crane with a horizontal and inclined boom
KB 408 - tower crane Russian production designed for the construction of high-rise buildings. It combines advanced domestic technologies, the development of which began in the days of the USSR. This model has absorbed the best of its predecessors. The carrying capacity of KB 408 is 10 tons, which is a worthy indicator in this price category. The capabilities of this crane installation can be applied in the economic and construction areas, and it will take a lot of working time to unlock the maximum potential. This is not surprising, because KB 408 is reliably protected from overload, has various functions, as well as a comfortable cabin and a reliable design. All this provides durable and trouble-free operation, and also increases labor productivity.
Description and purpose
KB-408 is a professional-class equipment designed for the construction of 16-storey skyscrapers. This model takes into account key points as thoughtful safety and ergonomic handling. Due to the lifting capacity of 25, this crane installation is able to carry out the installation of structures and buildings, as well as move bulky technical equipment to a certain height and distance. In addition, KB-408 can be used as a replacement for low-power manipulators, the potential of which is often not enough for the construction of large logistics and industrial centers. And finally, to confirm the unlimited capabilities of this model, we note its high popularity in search and rescue operations - for example, when removing rubble resulting from the destruction of urban infrastructure.
Technical and cargo-altitude characteristics
- Load moment - 1800 t
- Load capacity - 10 t
- Load capacity for each boom section - 3 t
- Boom parameters: horizontal boom length – from 4.5 to 32 m; length of the inclined boom - from 4.2 to 26.6 m; horizontal boom height - 54 m; height of the inclined boom - 72.7 m
- Lifting speed - 30 m/min
- Load lowering speed - 4.8 m / min
- The speed of the movement of the cart with the load - 30 m / min
- Base and track length - 7.5 m
- Power - 77.6 kW
- Productivity of a cargo winch with a horizontal boom - 55 kW
- Productivity of a cargo winch with an inclined boom - 30 kW
- Power turntable– 7 kW
- Boom winch power - 15 kW
- The total weight is 95 tons.
Features of the device and operation
The KB-408 tower crane can be used everywhere due to its well-thought-out functionality and good adaptation to difficult harsh conditions. So, the forklift of the same name includes several elements:
- turntable
- portal
- telescopic turret with 180-degree swivel capability
- crane operator's cabin
- girder boom
- running frame
- additional details
In the upper part of the platform there is a portal, as well as shooting and cargo winches. The back of the platform, in turn, is a place for attaching the counterweight, which is 10 reinforced concrete blocks. In fact, these blocks make the structure heavier, and thereby prevent the swivel mechanism from swinging when carrying loads. As for the additional parts, one can single out the support hinge and working struts.
Portal - is a quadrangular structural element, open on both sides and fixed on the trussed element and cylindrical struts. At the heart of the portal are two trihedrons connected with box beams. With the help of the portal, you can increase the height and ensure the stability of the boom. Of the other elements of the portal, it is worth highlighting a two-row roller mechanism and four locking elements that prevent the tower from falling during the installation of the crane.
Tower - includes head, head sections and struts. Head, arranged in the form of a metal lattice with racks, stairs and platforms, which give rigidity.
Cabin mounted on a crane with special mounts at the top of the tower. The cabin can rise to a height of up to 20 meters. The cabin of the KB-408 model is cozy and spacious. We also note good visibility due to the wide glazing line, reliable protection against corrosion and other external influences, multi-layer heat and noise insulation, heating panels and other elements. All this provides comfort and coziness, including thanks to the autonomous air conditioner, which allows you to set the desired temperature. All controls in the cab, including levers and switches, are located conveniently and ergonomically and, as they say, at your fingertips. With the help of special indicators, instrumentation and displays, it is possible to control the state of working bodies, determine their location, height and load.
Beam boom - a separate structural element, welded with flange parts. With the help of a beam boom, the trolley rotates, which is responsible for moving the load. The cart, in turn, changes the reach of the boom.
Chassis. The trolleys are fastened by two weather vanes, and a knife switch is mounted in the crane chassis. Weathercocks can be adjusted and converted into transport and working condition. The total number of carts - 4 pcs. Two of them work with the help of an electric drive. The rail mechanism for the KB-408 model is rounded and straight.
Optional equipment:
- A cargo winch responsible for the operation of the engine, gearbox, brakes and drum mechanism. All these elements are attached to the platform. The main purpose of the winch is to move cargo in a vertical position.
- Trolley winch, consisting of the same parts as above. Two-speed motor provides accurate guidance of the cargo object to the installation site
- Telescopic choke - a tubular mechanism that ensures a uniform position of the tower during its installation on the platform
- A triangular strut mounted on top of a tower. It is an auxiliary element when installing the tower. The brace includes four axle blocks, a guy wire, a part of the rope for carrying loads, and a mounting device with a load cell.
The crane can be transported using a rail mechanism. To increase the maximum height of 77 meters, it is necessary to tilt the boom at an angle of 30 degrees. It is believed that at a lower height it is possible to achieve a greater carrying capacity, or vice versa
Built-in safety system that reads information from sensors that can determine the position of the boom, its load and a certain height. If the load is exceeded, the limiter will be activated, which also works in the event of a rollover. In addition, the limiter is able to prevent dangerous proximity to high-voltage wires, and thereby protect the crane and the operator from serious consequences.
Price
The average cost of a tower crane KB-408 for Russian market is 4 million rubles.
Russian factories began to manufacture the type familiar to us at the end of the 19th century, but crane building as an industry began to develop at a frantic pace after the October Revolution of 1917.
Tower cranes - situation today
Today in Russia there are about 6 large crane-building plants - out of 25 enterprises of the former Soviet Union not everyone managed to survive. Stagnation in construction led to a reduction in the production of tower cranes and the dismantling of existing equipment. Technologies in construction have also changed - heavy elements are a thing of the past, respectively, completely different requirements began to be imposed on tower cranes.
Crane KB 408
Nyazepetrovsk Crane Plant is one of the few Russian enterprises who survived the hard times. It accounts for about a quarter of the output of all products. The most popular model is the crane KB 408. Crane KB 408 it is intended for mechanization of construction and installation works in housing and civil engineering. The KB 408 crane allows erecting structures up to 72.7 m high and moving loads weighing up to 10 tons. The crane is available in 15 versions.
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Tower crane KB 408 is designed for mechanization of construction and installation works in residential and civil construction. Crane KB 408 can be used for building objects up to 72.7 m with a mass of mounted elements up to 10 tons. The KB 408 crane is a rail-mounted construction mobile full-revolving crane with a swivel tower and a beam boom with a cargo trolley that provides vertical and horizontal transport of building parts and materials. Tower crane KB 408 transported from site to site assembled. The crane KB 408 is mounted by its own mechanisms and with the help of a truck crane. Crane KB 408 is transported from site to site assembled. |
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Crane KB 408: specifications: Load capacity KB 408 - 10 tons. |
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