The off-highway truck final drive housing from Ningbo Ruican is a critical powertrain component for rigid haul trucks, articulated dumpers, and heavy-duty mining equipment operating in quarries, mines, and large-scale earthmoving projects. This housing encloses the final drive gear set that transmits torque from the differential to the wheels, and must withstand enormous torsional loads, shock impacts from rock-strewn haul roads, and continuous vibration in 24/7 mining operations.
Manufactured via Sand Casting in QT700-2 ductile iron, this housing combines high tensile strength with excellent vibration damping characteristics. Ningbo Ruican’s precision casting process ensures uniform wall thickness and optimized material flow, eliminating the porosity and shrinkage defects that compromise cast housings made with inferior processes. Post-cast heat treatment achieves the specified mechanical properties, and full CNC MACHINING delivers gear bearing bores, seal surfaces, and mounting interfaces ready for final assembly.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | Off-Highway Truck Final Drive Housing |
| Material | QT700-2 Ductile Iron (ASTM A536 100-70-03 equivalent) |
| Manufacturing Process | Sand Casting (Lost Wax) |
| Weight Range | 50–200 kg |
| Tensile Strength | ≥ 700 MPa |
| Yield Strength | ≥ 420 MPa |
| Elongation | ≥ 2% |
| Hardness | 220–300 HB |
| Dimensional Tolerance | ISO 8062 CT6–CT7 |
| Gear Bearing Bore Tolerance | IT6–IT7 |
| Heat Treatment | Normalizing + Tempering |
| Surface Treatment | Shot blasting + epoxy primer |
Key Features
- Extreme Load Capacity: QT700-2 delivers 700 MPa tensile strength for severe mining duty cycles
- Vibration Damping: Ductile iron’s inherent damping reduces noise and fatigue cracking vs. welded fabrications
- Uniform Wall Sections: Sand casting eliminates hot spots and stress concentrations
- Machined to Assembly-Ready State: Bearing bores, seal grooves, and bolt patterns fully CNC machined
Quality Assurance
- UT (ultrasonic testing) for internal soundness
- Magnetic particle inspection of critical zones
- Tensile and hardness testing per heat lot
- CMM full dimensional inspection of machined features
- IATF 16949 quality system with full PPAP capability
Applications
Rigid haul trucks (40–400 ton class), articulated dump trucks, wheel dozers, underground mining trucks, and heavy industrial vehicles.
Why Choose Ningbo Ruican?
- Proven expertise in heavy castings up to 200 kg
- Single-source casting and machining eliminate multi-vendor coordination
- Material certifications (EN 10204 3.1) provided with every shipment
- Responsive engineering support for design optimization (DFM feedback)
