Crane Wheel Set

Product Overview

The crane wheel set is a critical load-bearing and travel component for cranes. Mounted on rails, it rolls to support both the crane’s self-weight and the lifted load. These wheel sets are suitable for QD series electric double-girder bridge cranes and gantry cranes, and are also applicable to metallurgical, mining, port, and energy industry travel mechanisms. Standard wheel diameters range from Ø200 to Ø500 mm (custom sizes available on request).

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Key Features

  • High strength and wear resistance: Manufactured from premium materials (recommended 65Mn; also available CL60, ZG340-640, ZG50SiMn, 42CrMo) and supplied after appropriate heat treatment (quenching + tempering) to deliver improved mechanical properties, wear life and service life.

  • Optimized chemistry: 65Mn contains manganese, nickel and copper. Manganese increases hardenability, reduces surface decarburization tendency, and—by forming substitutional solid solution in ferrite—strengthens the matrix after heat treatment.

  • Proven bearing-housing designs: Available in both angle-box and 45° split bearing-housing configurations to simplify installation, maintenance and wheel alignment, minimizing wheel–rail wear (flanging/“chewing”).

  • High machining and assembly accuracy: Forging followed by CNC precision machining ensures tight tolerances and stable running behavior.

  • Multiple sizes & customization: Standard diameters in stock and full customization of material, heat treatment and dimensions to meet special service conditions.

Materials & Heat Treatment

  • Standard material (recommended): 65Mn.

  • Alternative materials: ZG340-640, ZG50SiMn, 42CrMo, CL60 (available per customer request).

  • Heat treatment: Normally supplied after quenching + tempering. Other treatments such as normalizing or quench-and-temper (quench + temper), or austempering can be performed per customer requirements.

  • Selection guideline: Material and wheel diameter selection should be based on worst-case support load calculations to ensure no individual wheel becomes overloaded.

Applications

  • QD5 — QD500T electric double-girder bridge cranes and gantry cranes;

  • Metallurgy, mining, ports, steelworks, energy and other heavy-industrial travel mechanisms;

  • Diameter range: Ø200 — Ø1000 mm (other non-standard sizes available).

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Structural Design

Bearing Housing Types

  • Angle-box design: The angle-box is bolted to the trolley frame or main girder flange and allows wheel attitude adjustments during maintenance to correct horizontal and vertical misalignment and prevent rail damage. This is a widely adopted, mature solution among domestic crane designs.

  • 45° split bearing-housing: The bearing-seat half-ring is welded to the trolley frame or end beam, then the mating surface between the half-ring and the bearing box ring is finish-machined as an assembly. This guarantees assembly accuracy and wheel alignment, simplifies installation/disassembly, and is a modern approach often used in recent Chinese crane designs.

Wheel Diameter & Matching Principles

Wheel diameter and material selection must be verified by worst-case support-load calculations so all wheels share loading evenly and no single wheel is overloaded during operation.

Single flange Crane Wheel Sets Typical Model Dimensions

Single flange crane wheels Set model chart

Notes: For specific strength, load and bearing selection, please provide crane capacity (tonnage), rail gauge, service class, maximum support load and operating conditions (e.g., impact, ambient temperature, corrosive environment). As a professional crane wheel supplier and crane wheel manufacturer, we can provide calculations and recommended designs.

Manufacturing Process

  1. Raw material procurement: Select steel ingots or billets of the correct grade and size per customer drawings.

  2. Chemical composition re-check: Verify raw material chemistry before production.

  3. Marking & cutting: Cut billets to suitable size and weight for downstream processing.

  4. Heating (including soaking): Preheat to required temperatures and hold for forging.

  5. Forging: Forg by press or hammer according to forging ratio; monitor dimensions in real time and control temperature with infrared thermometry.

  6. Forging inspection: Initial inspection of blanks for surface defects and dimensional allowance compliance.

  7. Post-forge soaking & normalizing: Refine grain structure, homogenize microstructure and relieve stresses prior to final heat treatment.

  8. Rough machining: Machine to near-net shape, leaving finishing allowance.

  9. Heat treatment: Carry out normalizing, quench-and-temper or other specified heat treatments; choose air/oil/water quench method per material requirements.

  10. Finish machining: CNC precision machining to final dimensions and surface finish.

  11. Appearance & NDT inspection: Visual inspection, ultrasonic testing (UT), magnetic particle testing (MT), hardness checks and carburization depth measurement (if applicable).

  12. Mechanical testing: Tensile, yield, impact (Charpy), metallographic analysis and other tests as required; produce test reports.

  13. Surface treatment & packaging: Anti-rust painting or other surface finish, crate or pallet packaging and storage for shipment.

Customization & Service Commitment

  • Customization: We support production to customer drawings, special materials, heat treatment, surface treatments and designs for severe service conditions.

  • Technical support: Material selection guidance, load/strength calculations, and bearing/drive pairing recommendations.

  • After-sales: Technical consultation, installation guidance and quality follow-up.

  • Warranty: Product quality assurance and warranty terms per contract.

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