XCMG QY50B / QY50K / QY70K Wheel Hub Assembly – 10-Stud 275mm PCD Crane Axle Component

WHEEL ASSEMBLY HUB XCMG TRUCK CRANE QY50B QY50K QY70K

This wheel assembly hub is engineered specifically for the XCMG QY50B, QY50K, and QY70K mobile truck cranes. Designed to withstand heavy radial and axial loads, this hub ensures reliable wheel mounting, smooth rotation, and long service life under demanding lifting and transport conditions.

Key Product Highlights

• Direct replacement for XCMG original part numbers

• Manufactured from high-strength ductile iron (QT450-10)

• Precision CNC-machined bearing bores and mounting faces

• Corrosion-resistant coating for extended outdoor durability

• Dynamic and static load tested to exceed OEM specifications

• Bolt-on fit – no additional modification required

Material & Treatment

• Material: Ductile cast iron QT450-10 (tensile strength ≥ 450 MPa)

• Surface finish: Phosphate-coated + anti-rust oil film

• Hardness range: HB 170–210

• Machining tolerance: ISO 7g class for bearing seats

Load Ratings

• Static radial load capacity: 48,000 kg

• Dynamic radial load capacity: 32,000 kg

• Max permissible wheel speed: 85 km/h (matching crane transport speed)

Compatibility Notes

This hub is a direct fit for the front and rear steer axles of XCMG QY50B, QY50K, and QY70K cranes. It accepts standard 10‑stud wheels with 22 mm studs. Always verify your existing hub's bolt pattern and pilot diameter before ordering. For axle-specific variants, please reference your crane’s axle serial number.

Recommended Supporting Components

To complete your wheel-end assembly, we recommend pairing this hub with:

• Genuine XCMG wheel studs and nuts

• Tapered roller bearings (inner and outer)

• Wheel hub oil seal with dust lip

• Brake drum (if replacing as a set)

Installation Guidelines

• Clean all mating surfaces before installation

• Apply anti-seize compound to stud threads (recommended torque: 550–600 Nm)

• Pack bearings with high-temperature lithium grease (NLGI #2)

• After installation, check hub end-play (0.05–0.15 mm) using a dial gauge

• Retorque wheel nuts after first 100 km of operation

Why Choose This Hub for Your XCMG Crane

The wheel assembly hub is a critical safety component. Using an inferior or incorrectly sized hub can lead to bearing seizure, wheel detachment, or axle damage. This hub is manufactured under strict ISO 9001 controls, with 100% dimensional inspection and magnetic particle crack detection on every unit. It is backed by a 12‑month warranty against manufacturing defects.