Front Differential
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This page explains how Differential Case is classified within Motor Vehicle Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
The housing that encloses and protects the differential gears and components within a front differential assembly.
Technical details and manufacturing context for Differential Case
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Material | QT400-18 | Ductile iron grade for strength and toughnessGB/T 1348 |
| Tensile Strength | ≥400 MPa | Minimum for QT400-18GB/T 1348 |
| Yield Strength | ≥250 MPa | Minimum for QT400-18GB/T 1348 |
| Elongation | ≥18 % | Minimum for QT400-18GB/T 1348 |
| Hardness | 156–197 HBW | Typical for QT400-18GB/T 1348 |
| Operating Temperature | -40–120 °C | Exceeding range may degrade material properties |
| Bearing Bore Diameter | 80–120 mm | Typical range for front differential cases |
| Flange Diameter | 150–200 mm | Mounting flange size |
| Overall Length | 200–300 mm | Envelope dimension |
| Weight | 5–10 kg | Depends on size and wall thickness |
| Bearing Bore Tolerance | H7 | Ensures proper bearing fitISO 286-2 |
| Flange Face Flatness | 0.05 mm | Critical for sealingISO 1101 |
| Surface Finish | Ra 3.2 μm | On machined surfacesISO 1302 |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
| pressure: | 0 to 3 bar internal, 0 to 10 bar external (housing pressure rating) |
| other spec: | Max torque capacity: 500-5000 Nm (model dependent), Lubricant viscosity range: SAE 75W-90 to SAE 85W-140 |
| temperature: | -40°C to 150°C (operating), -50°C to 180°C (peak) |
Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.
Quoted from the published standard.
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The differential case encloses and protects the differential gears and pinions, provides mounting points for bearings, seals the lubricant, and transfers torque from the ring gear to the axle shafts while withstanding mechanical stresses and thermal loads.
Common materials include cast iron, aluminum alloy, and forged steel. The specific grade, such as ductile iron QT400-18, is selected based on strength, weight, and cost requirements.
Typical bearing bore diameter is 80–120 mm with H7 tolerance, flange diameter 150–200 mm, overall length 200–300 mm, and weight 5–10 kg. These are reference ranges; confirm exact values for your application.
Specifications such as material grade, tolerances, and surface finish must match the vehicle's requirements to ensure proper fit, function, and durability. The manufacturer or supplier can provide model-specific data and confirm compliance with relevant standards.
This component is essential for the following industrial systems and equipment:
Commonly used trade names and technical identifiers for Differential Case.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
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