Crane Wheel Block Assembly

L block crane wheel assembly

Applicable Scenarios

The double flange L‑block crane wheel assembly is primarily used in:

Gantry cranes

Running mechanisms of double girder bridge cranes

Casting cranes

Electric flat cars

Trolley groups

Ship unloaders

Shipyards

Port machinery

Coal unloaders

Stacker reclaimers

Shore bridges (ship‑to‑shore cranes)

And similar heavy‑duty applications

Composition

The angular box‑type crane wheel assembly mainly consists of four components:

Wheel axle

Wheel disc

Angular bearing box

Bearings

Features

Convenient adjustment for derailment or rail biting:

When crane wheel derailment or biting occurs, the angular box‑type structure offers the most convenient adjustment.

The angular box‑type bearing seat uses horizontal and vertical key plates welded to the frame for wheel positioning.

When derailment or biting occurs, the welds can be cut on‑site to adjust the wheel and key plates before re‑welding them to the frame – without cutting the end beam.

Ease of maintenance:

Compared to European‑style crane wheel assemblies, the disassembly and assembly of the angular box wheel are more convenient during wheel replacement.

Crane Wheel Materials

The crane wheel is often made of high manganese alloy or cast steel.

Cast steel wheel assemblies include:

Cast 55

Cast 50SiMn

Cast 42CrMo

Forged steel wheel assemblies include:

Forged 60

Forged 42Cr

Size Parameters:

45°Split Bearing Box Crane Wheel Assembly

Composition

The 45° split bearing box crane wheel assembly mainly consists of four components:

Wheel axle

Wheel disc

45° split bearing box

Bearings

Features

Advantages:

Most convenient structure for disassembly and assembly – Facilitates easy maintenance and replacement of crane wheels.

Designed for heavy lifting equipment under high wheel pressure conditions, equipped with self‑aligning bearings.

Emphasis on installation at the ends of the web plate of the end beam, effectively protecting installation bolts from high‑stress areas.

The web plate is welded to the support ring – a method that is more reliable under heavy loads and vibration than side shear bolts. Although the support ring material differs from the end beam web plate, modern welding techniques have overcome this issue.

Disadvantages:

In the event of crane wheel biting or derailment, this structure is not suitable for adjustment.

The straightness and parallelism control of this wheel type is not as precise as that of wheels mounted on the side of the web plate, requiring the use of spherical outer bearings to correct the running posture of the wheel.

Wheel Assembly Materials

The crane wheel is often made of high manganese alloy or cast steel.

Cast steel wheel assemblies include:

Cast 55

Cast 50SiMn

Cast 42CrMo

Forged steel wheel assemblies include:

Forged 60

Forged 42CrMo

Forged 65Mn

European crane wheel assembly

Applicable Scenarios

Mainly used in modern, more advanced European‑style cranes.

Composition

European‑style crane wheel assemblies mainly consist of four components:

Wheel axle

Wheel disc

Bearing box

Bearings

Features

Advantages:

Superior material performance allows for smaller wheel diameters under the same load conditions.

More compact structure and sleek design, thanks to integral boring and milling processes and modern electric heat treatment.

Lighter weight and smaller size compared to traditional designs.

Disadvantages / Considerations:

Must directly match with a three‑in‑one reducer without connecting through a coupling, requiring very high assembly precision.

The bearing box is directly bolted to the end beam web plate, making it difficult to adjust when wheel biting occurs and harder to disassemble compared to the angular bearing box structure.

Smaller wheel diameter leads to:

Increased curvature

Smaller contact area with the track

Higher wheel‑rail contact stress under the same wheel pressure

Ensuring the same running speed with a smaller diameter increases rotational speed and tread wear.

Under minor changes in wheel pressure, input torque is significantly reduced.

The difference between the wheel axle bearing the load and the wheel axle transmitting the torque results in excessive space between axles, leading to waste in raw materials and labor.

Comparison – Square vs. Round Bearing Box:

The square bearing box wheel assembly has a positioning pin during installation, providing higher positioning accuracy than the round bearing box type.

However, the square bearing box type is less convenient to disassemble.

Material

Extensively uses forged chromium alloy materials.

Specifications (Diameter)

Main specifications include:

ø160 mm

ø200 mm

ø250 mm

ø315 mm

ø400 mm

ø450 mm

ø500 mm

DWB wheel blocks

Applicable Scenarios

Mainly used in:

Stackers

Shield machines

Equipment supporting applications

Metallurgical trolleys

And other related industries

Features

Very easy to assemble – Simple wheel change process.

Fully enclosed design – Lifetime maintenance‑free operation.

Ball‑milled cast iron travel wheel – Self‑lubricating function and excellent wear resistance; design service life up to ten years.

High load capacity – Big bearing capacity with light traveling sound.

Spline hub design (driving wheel) – Connects directly with reducer spline for compact structure and rational design.

Five finishing surfaces – Convenient connection with structures, ensuring accurate installation. Options include:

Top connection

Side connection

Pin connection

End connection

Modular standard design – Complete walking solutions and components, significantly reducing design costs and time for crane traveling mechanisms.

Crane Wheel Material

Spheroidal graphite cast iron (ductile iron)

Technical Parameters

 

 

Parameter	Details
Wheel load range	2.75 – 40 tons
Series classification	Scientific series division: DWB112 – DWB500

Type	A (mm)	B (mm)	H (mm)	K (mm)	H1 (mm)	H2 (mm)	H3 (mm)	H4 (mm)	B1 (mm)	B2 (mm)	B3 (mm)	B4 (mm)
DWB112	190	96	131	55	47	30	40	80	40	30	/	24
DWB125	220	98	147.5	55	53.5	20	40	100	50	37	/	37.5
DWB160	275	110	187	60	70	25	55	100	54	47.5	/	20
DWB200	340	130	238	60	90	35	75	100	62	64	56	40
DWB250	385	150	281	75	89	50	80	100	/	/	/	/
DWB315	470	180	349.5	90	114	70	80	100	/	/	/	30
DWB400	580	210	440	—	144	95	130	100	/	/	/	30
DWB500	700	240	566	—	183	110	160	100	/	/	/	30

Type	A1 (mm)	A2 (mm)	A3 (mm)	A4 (mm)	A5 (mm)	D1	D2 (mm)	D3 (mm)	D4	D5	Weight (kg)	Max. Load (kN)
DWB112	145	145	145	/	45	4×M12	10.5	18.5	4×M12	2×M12	10	27.5
DWB125	175	175	170	/	55	4×M12	13	21	4×M12	2×M12	15	50
DWB160	220	220	220	/	55	4×M16	17	30	4×M16	2×M12	26	70
DWB200	275	275	275	/	65	4×M16	20	35	8×M16	2×M12	41	100
DWB250	310	310	290	140	80	8×M16	34F8	40	2×M12	/	70	160
DWB315	370	370	360	180	100	8×M16	40F8	50	2×M12	2×M20	130	220
DWB400	450	450	440	210	120	8×M20	31H13	65	2×M12	2×M20	220	300
DWB500	580	580	620	480	125	8×M20	31H13	70	2×M12	2×M20	380	400