Overview of ZOKECRANE Crane Wheel Assemblies
Manufactured by Henan Zoke Crane Co., Ltd., ZOKECRANE crane wheel sets are forged or cast from premium alloy steel (such as 65Mn, 42CrMo, 45# steel, and ZG55). Engineered in strict accordance with DIN, FEM, and ISO standards, our wheel assemblies feature deep induction-hardened tread surfaces, heavy-duty spherical roller bearings, precision-machined steel axles, and rugged bearing pedestals or modular wheel block housings (such as DRS wheel systems) for wheel loads ranging from 5 tons to over 100 tons per wheel.
Key Technical Specifications & Parameters
| Technical Parameter | Crane Wheel Assembly Specification |
|---|---|
| Product Type | Double Flange / Single Flange / Flangeless Wheel Assembly, DRS Modular Wheel Block |
| Wheel Diameter (Tread D) | Ø200 mm, Ø250 mm, Ø315 mm, Ø400 mm, Ø500 mm, Ø630 mm, Ø710 mm, Ø800+ mm |
| Maximum Allowable Wheel Load | 5 Tons to 100+ Tons per wheel (Custom heavy-duty ratings available) |
| Manufacturing Material | Forged alloy steel: 65Mn, 42CrMo, 35CrMo; Cast steel: ZG55, ZG340-640 |
| Tread Surface Hardness | Medium-frequency induction quenching: HB 300–380 / HRC 40–55 (Hardened depth: 15–20mm) |
| Matching Rail Profiles | QU70, QU80, QU100, QU120, A45 to A150, P38, P43, P50, CR104, Square rails |
| Bearing Integration | SKF / FAG / NSK / Heavy-duty domestic spherical roller bearings with grease seals |
| Drive Connection Options | Splined shaft, keyed shaft, geared rim / internal gear rim, shrink-disc mounting |
| Certifications & Standards | ISO 9001 Quality System, CE Certified, SGS Verified, DIN 15070 / FEM Compliant |
Core Product Advantages & Engineering Features
- Deep Induction Hardened Treads: Precision heat treatment creates a tough, wear-resistant outer tread layer (HRC 40–55) with a ductile core, preventing surface spalling and flange fracture.
- Eliminates Rail Gnawing & Friction: Precision CNC lathe turning and bored bearing seats guarantee exact axis parallelism, eliminating side-flange friction and extending rail runway life.
- Heavy Spherical Roller Bearings: Outfitted with high-capacity self-aligning roller bearings that absorb structural deflections and heavy axial shock loads.
- Turn-Key Modular Assembly: Pre-assembled and lubricated with wheel hubs, bearings, seals, axles, and mounting pedestals ready for direct bolting onto crane end carriages or trolleys.
Industrial Applications of Crane Wheel Assemblies
ZOKECRANE heavy-duty wheel sets and modular wheel blocks are essential travel mechanism components utilized across diverse lifting machinery worldwide:
1. Single & Double Girder Overhead Cranes
Serves as bridge travel wheel sets on top-running end carriages and trolley travel wheel blocks on double girder winches.
2. Gantry & Semi-Gantry Outdoor Cranes
Heavy double-flange forged wheel assemblies engineered for ground tracks on shipyard Goliath cranes, container gantries (RMG), and yard cranes.
3. Metallurgical & Foundry Steel Mill Cranes
Heat-resistant 42CrMo forged wheel sets operating in high-temperature melt shops, ladle cranes, and scrap handling equipment.
4. Rail Transfer Carts & Port Equipment
Heavy wheel assemblies used on heavy-duty cross-bay rail transfer cars, portal slewing cranes, and ship-to-shore quay cranes.
Frequently Asked Questions (Product FAQs)
What is the difference between Forged Steel Wheels and Cast Steel Wheels?
Forged Steel Wheels (e.g., 65Mn, 42CrMo) undergo intense forging pressure, eliminating internal porosity, blowholes, and structural defects. They offer significantly higher fatigue strength and impact resistance, making them essential for heavy-duty cranes. Cast Steel Wheels are economical for light-to-medium duty cranes with lower operating cycles.
How deep is the heat treatment layer on ZOKECRANE wheel treads?
We utilize medium-frequency induction quenching on the wheel tread and inner flange surfaces. The hardened layer reaches a depth of 15 mm to 20 mm with a surface hardness of HB 300–380 (HRC 40–55), maintaining a ductile interior matrix to absorb heavy dynamic impacts.
When should a crane wheel assembly be replaced?
A wheel assembly must be replaced if: the wheel flange thickness is worn by 50% or more, tread thickness wear exceeds 15% of original diameter, tread surface pitting/spalling occurs, or visible fatigue cracks are detected during NDT inspections.
Can ZOKECRANE manufacture custom wheel assemblies according to customer drawings?
Yes. We specialize in custom-machining wheel assemblies, geared wheels, and replacement wheel sets matching your original CAD drawings, shaft dimensions, bearing preferences, or OEM part numbers.
Export & Logistics FAQs for International Buyers
Which international markets does ZOKECRANE export crane wheel assemblies to?
ZOKECRANE crane accessories and structural travel mechanisms are supplied globally, serving crane builders, gear motor integrators, and industrial plants in Russia, Uzbekistan, the Philippines, Bangladesh, Australia, Qatar, Tanzania, Singapore, Saudi Arabia, Brazil, Nigeria, and many other global markets.
How are crane wheel assemblies packaged to prevent rust and impact damage during sea freight?
Machined treads, flanges, axle journals, and keyways receive thick anti-rust grease and protective rubber/plastic wraps. Complete wheel assemblies are vacuum-sealed in moisture-proof plastic film and packed in heavy-duty export-standard fumigated wooden cases with internal wooden bracing.
What quality test reports and certifications accompany ZOKECRANE wheel shipments?
Every shipment is accompanied by complete quality documentation, including ISO 9001 compliance, European CE certificates, EN 10204 3.1 Material Test Reports (MTR) for steel forgings, ultrasonic testing reports (UT), hardness test sheets, and SGS verification upon request.
What shipping terms and manufacturing lead times do you offer?
We support standard international commercial terms including FOB, CIF, CFR, DDU, and DDP. Standard forged wheel blanks (Ø250mm to Ø500mm) are kept in stock with fast machining lead times of 10 to 15 business days; custom heavy-tonnage or special alloy wheel assemblies take 20 to 30 business days.
Does ZOKECRANE supply gear-driven wheel assemblies complete with reducers?
Yes. We provide complete integrated wheel drive systems, including external geared rim wheels, internal splined wheels, or direct three-in-one gear motor drive packages ready for instant mounting onto your crane trolley or end carriage frame.