Wheel Blocks & End Carriages

Wheel blocks and end carriages are the travel mechanism of an overhead crane. They carry the weight of the bridge, the hoist and the load, and drive the crane along the runway rails. End carriages An end carriage is a steel box-section beam fitted at each end of the bridge and bolted to the bridge girders. It houses the travel wheels and drive motors. The wheel seats are machined to keep the wheels accurately aligned and stop the bridge from skewing on the rails. Rubber or hydraulic buffers are fitted at the ends. End carriages are available for top running cranes, which travel on top of the rails, and for underslung cranes, which run on the lower flange of the runway beams. Wheel blocks A wheel block is a self-contained unit with a housing, wheel and lifetime-lubricated bearings. It can be fitted inside an end carriage or bolted directly to a steel structure, and the modular design lets a worn unit be replaced without dismantling the whole end carriage. Wheels come in several profiles: double flanged, single flanged, flangeless with lateral guide rollers, or polyurethane tyred for quiet floor travel. Ductile cast iron wheels reduce friction and rail wear. Selection data When selecting wheels and end carriages, determine the maximum wheel load, meaning the force on a single wheel with the hoist loaded and positioned at the end of the bridge. Determine the travel speed and control method as well; inverter drives give soft acceleration and braking, reducing load swing and gearbox wear. The wheelbase of the end carriage also needs to suit the bridge span, so the crane does not jam or skew on the rails. The model table lists the wheel load, wheel diameter, matching rail profile and drive data for each model.

When to choose this

High durability under heavy loads
Compatible with a range of rail profiles
Electric drive with speed control
Simple, accessible maintenance

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Technical specification

Technical specification: Wheel Blocks & End Carriages
Item	Value
קיבולת	עד 80 טון
תאימות	קורות I ו-Box
חומר גלגלים	פלדה יצוקה
מערכת הנעה	חשמלית / ידנית
רוחב מסילה	100 – 600 מ"מ

Standards

EN 13001

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Other categories

EOT Cranes (Electric Overhead Travelling Cranes)

An overhead travelling crane is installed at the top of the building and travels along a fixed runway, covering the whole hall while leaving the floor clear. The bridge travels the length of the hall, the hoist travels across the bridge and the hook raises and lowers, so the load can reach any point under the crane. Overhead cranes are used in manufacturing plants, warehouses, workshops and maintenance halls. Overhead cranes differ in two main ways: Runway mounting Top running crane: the bridge travels on rails mounted on top of the runway beams, which are supported on the building columns or on concrete corbels. This configuration suits heavy loads and wide spans. Underslung crane: the bridge hangs from the roof structure and runs on the lower flange of the runway beams. This configuration suits buildings with no room for columns, and lets the hook get closer to the side walls. Number of girders Single girder: one girder with the hoist running on its lower flange. Lighter construction and quicker to install, suited to light and medium loads. Double girder: two parallel girders with a hoist trolley running on top of them. The hook rises up between the girders, giving more lifting height, and the structure suits heavy loads and intensive duty. The right crane depends on lifting capacity, hall width, available headroom and the existing structure. The model pages list the technical data for each type. The crane moves along three axes, down the length of the building, across the bridge and vertically, and covers the entire floor area without forklifts and without temporary rigging. The first decision is the mounting method. A top running crane travels on rails carried by columns and uses almost the full height of the building, which suits heavy loads and wide spans. An underslung crane hangs from the roof structure, and suits cases where columns cannot be added or where the production floor has to stay clear, at the cost of a shorter span. The second decision is the number of girders. A single girder is lighter, less expensive and puts less load into the structure. A double girder carries far heavier loads and also gives more hook height in the same building, because the hook rises between the girders rather than below them. The third decision is the operating environment. A bridge crane is built around its hoist unit and electrical system, so it can be specified for the environment it will work in. Alongside the standard industrial build we supply versions for ATEX classified areas, for marine and coastal installations, for dusty and high humidity conditions and for aggressive chemical environments. The specification is fixed at the design stage rather than retrofitted, so the environment should be defined in your first enquiry. We supply 129 configurations across three series: single girder from 2 to 12.5 tonnes over spans of 10.5 to 31.5 metres, double girder from 5 to 50 tonnes over spans of 13.5 to 31.5 metres, and underslung from 2 to 10 tonnes over spans of 6 to 20 metres. Standard lifting height is 9 metres and the duty rating is A5 to FEM 2M. Every crane is engineered to your building dimensions, your loads and your operating environment rather than selected from a catalogue. We carry out the site survey, the design, the installation and the commissioning, and stay with the crane through routine maintenance for its working life.

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Jib Cranes

Jib cranes for workstations and machine tending, from the BRIMA catalogue. Six series: four with manual slew from 80 to 1,000 kg on arms of 3 to 7 m, and two with powered slew from 1,000 to 6,300 kg on arms of 5 to 10 m. Each mounts on its own column or on a wall, and slew runs from 180 to 360 degrees depending on the model. The 95 configurations the catalogue offers are set out in each series table, which gives, for every rating, the arm lengths it is sold in.

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Wire Rope Hoists

A wire rope hoist is an electric hoist in which a steel wire rope winds onto a drum, driven by an electric motor to raise and lower the load. Wire rope hoists suit heavier loads, greater lifting heights and more intensive duty than chain hoists, which makes them the usual choice for overhead cranes, gantry cranes and lifting systems that work full shifts. The hoist is mounted to suit the crane: on a trolley running on the lower flange of the beam in a single girder crane, on a crab running on rails above the two girders in a double girder crane, or fixed on a base. For buildings with limited headroom there are low headroom versions, where the hoist sits tight against the beam and leaves more height under the hook. Most hoists have two lifting speeds or inverter speed control, for fast travel between points and gentle placing of the load. Upper and lower limit switches restrict hook travel, and overload protection stops the lift when the load exceeds the rated capacity. Each hoist's duty classification sets the operating hours and starts it is designed for, and should be chosen to match the work in the plant. The model pages list the lifting capacity, lifting height, working speeds and duty classification of each hoist.

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