Crane Wheels & Trolley Wheels

Wheel diameter, tread width, maximum load per wheel, rail size and type, operating environment (temperature, corrosion exposure), required standards, and quantity needed.

Forged wheels have 30-50% higher fatigue strength, no internal defects, and 2-3x longer service life. Cast wheels are more economical for light-to-medium duty applications.

Wheel diameter depends on load capacity and rail size. General rule: larger diameters handle heavier loads and last longer. Common sizes range from 150mm for light duty to 900mm+ for heavy port cranes.

• Light duty (≤5t): ZG340-640 cast steel or 45# forged steel
• Medium duty (5-20t): 42CrMo alloy steel
• Heavy duty (20t+): 34CrNiMo6 premium alloy or 65Mn spring steel
• Corrosive environments: Stainless steel 304/316

Tread surface: 300-380 HB for forged, 180-220 HB for cast. Core hardness should be 20-30 HB lower to maintain toughness.

Wheels are machined to match specific rail profiles. Using mismatched rails causes premature wear and potential derailment. Always specify your exact rail size.

Divide total crane weight (crane + rated load) by the number of wheels, then apply a safety factor (1.25-2.0 depending on duty class).

Single flange for indoor cranes with precise rail alignment. Double flange for outdoor gantries, uneven tracks, or high wind load areas.

LD blocks integrate the drive gear—compact for single-girder cranes. Round bearing housings use separate bearings, easier to maintain, suitable for heavier double-girder cranes.

FEM 1.001, ISO 4301, DIN 15070, CMAA 70/74, JIS B 8801, and GB/T standards. CE marking and material certificates available.

Yes. All wheels come with material test certificates (MTC) showing chemical composition and mechanical properties. Third-party inspection (SGS, TÜV, BV) available on request.

Ex d = flameproof enclosure, IIC = gas group (hydrogen), T4 = max surface temperature 135°C. Required for refineries, chemical plants, and hazardous areas.

Visual inspection monthly. Detailed measurement (diameter, flange wear, crack detection) every 6-12 months depending on duty cycle.

Tread wear exceeding 10% of diameter, flange wear reducing thickness by 25%, visible cracks, or bearing seizure.

Yes. Reconditioning restores tread diameter and hardness at 40-60% of replacement cost. Suitable for wheels with minor to moderate wear.

Bearing grease every 3-6 months depending on usage. Tread surface should remain dry—lubrication causes slip and reduces control.

For noise reduction (10-15dB), floor protection, vibration damping, or electrical insulation. Not for extreme heat or heavy abrasive loads.

80-90 Shore A for general crane applications. Softer (65-75) for quiet operation. Harder (90-95) for heavy loads.

Not always. Standard wheels with marine-grade coatings work for most outdoor applications. Stainless is needed for corrosive chemicals or food/pharma environments.