The KB-408 tower crane is a special rail-mounted equipment that is used for mechanization construction work, at a height of up to 72.7 meters and with loads of up to 10 tons.

The KB-408 tower crane is a construction mobile full-rotating rail-mounted crane with a rotating tower and a beam boom with a load trolley, providing vertical and horizontal transportation of construction parts and materials. The crane is transported from site to site disassembled. Installation is carried out using our own mechanisms and using a truck crane.

The KB408 crane belongs to the 4th size group of tower cranes and has the same main components as the cranes of this group.

The boom design is sectional. The crane boom structure is made of metal pipes in the form of a lattice structure; the boom modules are connected to each other using flange connections. The KB 408 crane 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 crane version).

Construction of the KB-408 tower crane

Turntable and turning mechanism

The KB-408 platform is identical in design to the KB-160. Changed design rotary mechanism- it looks like a roller circle (in one row) with a diameter of 2500 mm. In addition, the crane received winches, blocks and electrical equipment for the cargo trolley.

Running frame with rotating vanes

Running frame with rotating weather vanes, portal. Similar to the KB-401 and KB-402 series.

Portal

The design of the portal and 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 crane version).

Tower

The design of the tower is unified with some components of the KB-160 crane, with the exception of the design and equipment of the tower head. It differs in the length of the pulley ropes and the maximum possible number of installed inventory sections, and the design of the head section of the tower has also 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). The basic, first-born model has a unified cabin for low cranes (installation at a height of up to 20 m). The mounting methods are similar to KB-160, as well as other series of cranes of the KB type. It differs from the cabin of the base model in a more advanced design, adapted for convenient viewing at a greater height of the crane, 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 connected to each other 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 load trolley.

Hook clip

The hook cage is a biaxial suspension: two cheeks, two axles, on which blocks, traverses and a hook are mounted on ball bearings. Additionally, there are metal external protective covers for the hook cage blocks.

Technical characteristics of the KB-408 tower crane

Total crane weight (in working condition), t	95,2
Maximum load capacity, t	10,0
Load capacity at maximum boom reach, t	6,0
Boom radius, m	6,0-30,0
Reach at maximum load capacity, m	16,0
Load moment, (kNm) tm	160,0
Maximum lifting height, m ​​(horizontal boom/oblique boom)	46,6 / 57,8
Total electric power 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 loading of cargo, m/min	4,8
Speed ​​of movement of the cargo trolley, m/min horizontal 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
Minimum radius of path curvature (internal rail), m	12,0

Video review of the KB-408 tower crane

Russian factories began to produce the type we are accustomed to 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 - the situation today

Today in Russia there are about 6 large crane-building factories - out of 25 enterprises of the former Soviet Union Not everyone managed to survive. The stagnation in construction has 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, and accordingly, completely different requirements began to be placed on tower cranes.

Crane KB 408

Nyazepetrovsk crane-building plant is one of the few Russian enterprises who survived difficult times. It accounts for approximately a quarter of all production. The most popular model is the KB 408 crane. Crane KB 408 designed for mechanization of construction and installation work in housing and civil construction. The KB 408 crane allows you to erect structures up to 72.7 m high and move cargo weighing up to 10 tons. The crane is available in 15 versions.

The KB 408 tower crane is designed for mechanization of construction and installation work in housing and civil engineering. Crane KB 408 can be used for construction projects up to 72.7 m with a mass of mounted elements up to 10 tons. The KB 408 crane is a construction mobile full-revolving crane on rails with a rotating tower and a beam boom with a cargo trolley, providing vertical and horizontal transport of construction parts and materials. Tower crane KB 408 transported from site to site in assembled form. The KB 408 crane is installed using its own mechanisms and using a truck crane. The KB 408 crane is transported from site to site in assembled form.

Crane KB 408: specifications: Loading capacity of KB 408 is 10 tons. - Load moment KB 408 - 200 tm. - KB 408 boom radius - 40 m. -Power of the KB 408 electric motor is 123.6 kW. -The depth of lowering KB 408 is 5 m. -Rotation speed of the KB 408 tower crane is 0.65 rpm. -The lifting height of the hook KB 408 is 54.0-72.7 m. -Speed ​​of lifting (lowering) load KB 408 30; 45 m/min. -Load landing speed KB 408 4.8 m/min. -Weight of the KB 408 crane is 63.5 tons. - Counterweight weight KB 408 45 t.

Used in the construction of 16-story 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 technical characteristics? How is the KB-408 tower crane controlled? 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 using iron profiles welded in the form of a lattice. To change the reach: increase or decrease it, move the carriage.

The design of the KB-408 forklift consists of:

• rotary single-row devices, platforms;
• portal;
• telescopic tower rotating 180 degrees;
• operator cabins;
• beam-type booms with a cargo trolley, with its help lifting the load is possible 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

A counterweight in the form of 10 reinforced concrete blocks is mounted at the rear of the platform., thanks to them the rotating mechanism does not swing when moving.

Struts and racks are mounted in the truss elements.

The platform has a base and is attached to the chassis by means of a slewing bearing.

Recently there have been design changes in KB-408, with regard to the structure of the rotating 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 shape of a tetrahedron. On both sides it is open for the movement of tower parts. It is supported by a truss element and telescopic struts. Created from 2 trihedrons. The fastening between them occurs using box-shaped beams.

It is through the portal that the process of increasing height and 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 installation of the crane.

Tower

The turret design is similar to that of the K-160. Represents:

• head,
• inventory, head sections,
• spacers

Heading

The tower element is constructed like a metal lattice. Has racks, ladders, platforms.

At the very top of the head, a boom beam and a cargo rope are attached. There is a lightning removal device and an anemometer.

Head section

Blocks of two ropes are attached to it to move carts and loads. A signal light is installed at the top, and buffer stops for trolleys are installed at the bottom.

Control cabin

The device is held on special mounts at the top of the tower. It consists of a cabin for cranes operating at a height of no more than 20 meters. Compared with its predecessor, the K-160 has improved technical devices and heating panels.

Beam boom

The individual structural elements are welded and interlocked using flanged parts. The elements themselves are made of metal. They move the trolley moving the load. With the help of the latter, the arrow's reach is changed.

Running frame

The structure with dimensions of 7.5 x 7.5 meters (four-ring frame) contains rotating weather vanes on which the trolleys are supported. The switch is mounted on the running gear of the crane.

Weathervanes have two states:

• transport;
• working.

There are 4 trolleys for the crane. 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 peculiarities of these mechanisms lie in the position of the main control trolleys. On a straight type of rail - everything is on one axis. On a rounded one - outside the center of the rounding.

Additional details

As additional parts, KB-408 has various elements: brace, hook part and mounting device and other fasteners:

Cargo winch It has a drum mechanism, brakes, a gearbox, and an engine. They stay on the platform. The latter is attached using four screws. The purpose of the winch is to move the load vertically.

Trolley winch, the components are the same. The two-speed motor ensures precise guidance of the load over the installation site.

Telescopic strut constructed from pipes of different diameters, nested one inside the other. They provide balance and support for the tower when installed on the platform.

Crane spacer in the form of a triangle, attached to the top of the tower. Helps to install the tower and deflect the brace cable away from the tower. The spacer contains 4 axle blocks, a guy rope, a rope part for moving loads, and a device for mounting a load sensor.

The crane is transported in a disassembled state; it is mounted on site using existing mounting devices.

The crane is moved using a rail mechanism. KB-408 have counterweights to the tower, located under the latter.

In order to increase the maximum lift height to 77 meters, the boom is tilted at an angle of 30 degrees. The maximum boom reach 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 the KB-408 there is a platform that is fixed to the base of the boom.

Specifications

Load moment, max, t	1800
Load capacity, max reach, tons	6,3
Load capacity, max t	10
Load capacity, per boom section, t	3
Length (horizontal boom), max/min, m	32/4,5
Length (incline boom), max/min, m	26,6/4,2
Height (horizontal boom), max, m	54
Height (incline boom), max, m	72,7
Length (downward movement), m	5
Speed ​​(lifting load), max height, m/min.	30
Speed ​​(load down), m/min.	4,8
Trolley speed (with load), m/min.	30
V tap, m/min.	12,8
Rotation, m/min.	0,65
Base length, m	7,5
Track length, m	7,5
Curvature radius, min	12
Power, kWt	77,6
Cargo winch power with horizontal boom, kW	55
Power of cargo winch with inclined boom, kW	30
Rotator power, kW	7
Power of the device moving the crane along the rails, kW	11
Boom winch power, kW	15
Structural mass	54,8
Counterweight mass	40,4
total weight	95,2

How to manage

The beam design allows the load to be guided more smoothly to the installation site.

The tower crane is controlled using special software and hardware located in the cabin, in particular, command controllers and radio-controlled remote controls.

Switching between landing and ascent speeds occurs via a single switch.

This crane is distinguished by thirteen versions; only the boom radius values ​​differ (20, 30, 35), respectively, the lifting capacity and the lifting and lowering values.

The beam boom is installed at an angle, for example, 43 degrees and 30 degrees.

The crane has:

• self-diagnosis system of control mechanisms,
• remote control via GPRS,
• control using touch elements,
• frequency control of motors.

A cabin air conditioning system is also available as an option.

Crane equipment additions:

• Heating in the cabin. The crane can operate successfully both at +40℃ and -40℃. Since it is intended for zone IV. Accordingly, it has a well-heated operator's cabin.
• Load sensor. The load lifting mechanism is equipped with a load control sensor, thanks to which the main components of the system are monitored.
• Motion control cargo elements . Thanks to a special device (frequency), the movement of concrete slabs and other loads occurs smoothly and without interference.
• Cabin temperature control. Thanks to modern electronic components in the cabin, temperature is regulated.
• Safety system in case of rope break (shock absorber, tie). 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 for at least 7–10 million rubles. from the manufacturer Nyazepetrovsk Crane Manufacturing Plant. A beam boom 40-50 m long can also be supplied with the crane.

At the buyer's request, the selling 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 brothers is in the forefront in terms of technical equipment and load capacity. It has a relatively inexpensive price on the market and has a lot positive feedback among contractors. If the choice is about high-quality lifting equipment, then it’s definitely worth taking 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:

Tower crane KB 408

IN modern world, at any construction site, you can find construction machines of various kinds, types and types. Tower cranes are considered very popular. They help simplify the actions of specialists and provide effective assistance in any type of building construction.
Cranes can be of several designs. Let's look at the KB 408 tower crane.

TO tower cranes, type KB No. 408, are cranes on rails that have a boom (beam) and a rotating tower. They are intended to effectively mechanize construction or installation work in civil or residential buildings. At the same time, the KB 408 tower crane has a lifting capacity of 10 tons and can carry out work at a height of up to 72.7 meters.

T This type of taps belongs to group No. 4. All its leading nodes coincide with the nodes of each tap in this group.

WITH Crane head No. 408 has a sectional design. It is created using a lattice type (made of metal pipes). Each module on the boom is connected to each other using flange connections. It is possible to mount such a crane with an inclined boom. The crane boom is extended due to the moving carriage. The tower crane design is modular. Tower modules can vary in number from two to five pieces. This will depend on the type of taps.

H In order to transport this construction machine from one construction site to another, it must be dismantled and moved in several separate parts. First, the loading cart (entirely) and the boom are disconnected. Next, the reinforced concrete ballast slabs and each inventory tower section are disconnected. To transport the KB 408 tower crane, you should use a dolly. That is, for a new one building object, tower crane KB 408, will arrive already partially assembled.

D In order to mount the KB 408 crane and prepare it for work, the help of additional truck cranes is required.

P rebasing KB No. 408 is possible only in agreement with State bodies automobile inspection. These include official permission for transportation, and access to an accompanying vehicle that complies with the Road Traffic Regulations.
Cranes are manufactured by KB No. 408 at the construction machinery plant in Nyazepretrovsk. And, namely, at the Nyazepetrovsky Plant Construction Machines».
Climatic performance This type of crane is the fifth, produced in the first category. Which, in fact, corresponds to GOST 10150 69, for ambient air temperatures within -40 ° C - + 40 ° C.

Technical data of tower crane KB-408.21

Performances
Maximum load moment, tm
Load capacity, t
maximum
at maximum horizontal boom reach
maximum horizontal boom
maximum inclined boom
at maximum load capacity
minimum
Maximum lifting height, m
horizontal boom/number of sections
slanting boom
Maximum lowering depth, m
Speed, m/min
lifting/lowering the load
smooth cargo landing
cargo trolley
crane movement
Rotation speed, rpm.
Electric motor power, kW
main cargo winch
auxiliary cargo winch
jib winch
trolley winch
turning mechanism
crane movement mechanism
Total power of electric motors
Geometric parameters, m
track x base
rear marker
constructive
counterweights
Seismicity, points	1-6 according to SNiP II-7-81
Wind district

The KB408 rail-mounted tower crane is used to mechanize many works during construction. This model has gained great popularity due to its carefully thought-out design, which ensures not only its efficiency, but also safety. The high load capacity of the KB-408 makes it possible to install elements of buildings and structures and move bulky machinery or equipment over a given distance.

Main operating parameters of the model

Technical characteristics of the KB-408 crane are presented in the following table:

Load capacity	10 t.
Load capacity at maximum reach	6000 kg
Reach range	6-30 m
Reach based on maximum load capacity	1600 cm
Load moment	160 tons
Horizontal boom lift height	46600 mm
Boom lift height	57800 mm
Weight of the machine in working condition	95.2 t.
Structural mass	54.8 t.
Engine power (total)	123.6 kW
Load lowering depth	5000 mm
Rotation speed KB-408	0.65 revolutions/min.
Lifting speed of the heaviest loads	36 m/min
Maximum lifting speed	67 m/min
Optimal speed of smooth lowering of the load	4.8 m/min
Platform movement speed	7–30 m/min
Travel speed	18 m/min
Base	6000 mm
Track	6000 mm
Optimal internal radius of curvature of paths	1200 cm

Machine design

The design of the KB-408 crane is quite simple, which ensures its reliable operation and the absence of difficulties in operation.

Rotating mechanism and platform design

The KB-408 rotary platform is equipped with a portal and shooting and cargo winches attached to it. At its rear there is a counterweight consisting of ten massive reinforced concrete blocks. It prevents the KB-408 tower crane from swinging while moving loads, which ensures a high level of safety.

The rotating mechanism has the form of a roller circle with a diameter of 250 cm. The platform also contains blocks and electrical equipment for controlling the operation of the cargo trolley.

Running frame

Fixation of cargo trolleys is ensured by special rotary weather vanes (two pieces). The design of the running frame implies the presence of a switch. The position of the weather vanes can be adjusted. They can be moved to a working or transport position.

The KB408 crane is equipped with four transport trolleys. Two of them operate due to the presence of an electric drive. The rail mechanism of this model can be rounded or straight.

Tower sections

The KB-408 tower crane is equipped with several inventory tower sections, which depends on the model version. Their number ranges from 2 to 6.

Description of the tower

The design of the KB408 crane tower is in many ways similar to another model - KB-160. It differs only in the features of the head equipment and the ability to install a larger number of inventory sections.

Cabin description

The KB-408 tower crane has a comfortable cabin, which is installed at a height of twenty meters or more. It features a carefully selected design. The cabin provides comfortable visibility from a considerable height. It is insulated and equipped with heating panels, which ensures operator comfort in any weather.

Boom design

The boom of the KB408 crane is a structure consisting of steel pipes in the form of a lattice. The sections are connected to each other using flange fastenings. A loading platform equipped with a hook clip moves along the boom. To increase or decrease the reach, the angle of inclination of the boom mechanism changes.