Purchasing requirements for gantry crane and bridge crane wheels

When purchasing gantry crane and bridge crane wheels, it is necessary to comprehensively consider material properties, load-bearing capacity, working condition adaptability and compliance. The following is a point-by-point explanation of key procurement requirements:
1. Materials and manufacturing standards
Material requirements:
Preferably use alloy forged steel (such as 42CrMo, 65Mn), or ZG340-640 cast steel to ensure high hardness (HB≥300) and fatigue resistance.
For high temperature or corrosive environment, stainless steel (such as 304/316) or surface coating treatment (galvanized, nickel-chromium) can be selected.
Process standards:
Comply with ISO 4306, DIN 15046 or GB/T 10183 (Chinese national standard), forgings need ultrasonic flaw detection (UT) to detect internal defects.
2. Wheel design and load-bearing capacity
Wheel diameter and tread width:
Calculated according to the maximum wheel pressure (crane lifting weight, span, wheelbase and other parameters need to be provided), ensure that the contact stress is ≤ the material allowable value.
Wheel flange design:
Single wheel flange (suitable for good track guidance), double wheel flange (anti-derailment, recommended for large span or open-air working conditions).
Bearing matching:
Select spherical roller bearings (such as SKF 223 series) to compensate for track installation deviation.
3. Working condition adaptability
Temperature range:
Normal temperature type (-20℃~+120℃); low temperature type (-40℃) requires impact toughness test (AKV≥27J).
Wear resistance and corrosion resistance:
Harsh environments such as mines and ports require surface quenching (hardness HRC50-55) or surfacing wear-resistant layer (such as tungsten carbide).
Insulation requirements:
Insulated wheels (nylon coating or ceramic coating) are required for electrolytic aluminum and other occasions.
4. Dimensions and tolerances
Processing accuracy:
Wheel diameter tolerance ±0.5mm, tread cylindricality ≤0.1mm, roughness Ra≤1.6μm.
Track matching:
The wheel tread width must be 20%~30% greater than the track head width (e.g. QU80 track with tread of more than 100mm). 5. Certification and documents
Compliance certification:
CE (EU), GB/T (China) or OSHA (USA) certification is required.
Test report:
Contains material chemical composition, mechanical properties (tensile strength ≥650MPa), hardness distribution diagram and NDT report.
6. Supplier and after-sales service
Supplier qualifications:
Preferentially select manufacturers with crane manufacturing license (such as TSG certification).
Warranty requirements:
Warranty period ≥1 year, provide maintenance-free bearings or lubrication cycle ≥6 months design.
As one of the core components of a well-known Chinese crane manufacturer (Weihua Group), Weihua crane wheels have significant advantages in performance, reliability and adaptability. Weihua crane wheels have core advantages in material technology, adaptability to working conditions and service guarantee, and are particularly suitable for heavy-duty industrial scenarios with high reliability requirements. When purchasing, it is necessary to clarify the working condition parameters (such as load, track type, environment) to match the best model.