Precision CNC Machining of NISSAN TB48 Oil Pump Gear | HKAA

1. The Role of Oil Pump Gears in Automotive Engines

In modern engines, the oil pump gear plays a crucial role in maintaining proper lubrication and preventing wear between moving parts. For the NISSAN TB48 engine, which powers high-performance vehicles, a precision-machined oil pump gear ensures consistent oil pressure, smooth operation, and extended service life.

Unlike traditional cast gears, CNC machined oil pump gears deliver higher dimensional accuracy, improved concentricity, and excellent mechanical balance — critical for high-speed engine performance.

2. CNC Machining Process for the TB48 Oil Pump Gear

At HKAA, we utilize multi-axis CNC machining to produce oil pump gears from 4140 and 4340 alloy steel. These materials are known for their high strength, fatigue resistance, and excellent heat treatment response.

CNC machining process steps include:

• CNC turning to shape the gear blank

• CNC milling and hobbing to cut precise gear teeth

• Heat treatment to increase hardness and wear resistance

• Precision grinding to achieve a smooth surface finish (Ra ≤ 0.8μm)

• Final inspection using CMM and gear measuring equipment

Through this process, every gear meets tolerance levels within ±0.01mm, ensuring a perfect fit and high reliability during operation.

3. Material Advantages: 4140 & 4340 Alloy Steel

Both 4140 and 4340 steel are widely used in high-stress automotive parts due to their outstanding mechanical properties:

By using these materials in combination with CNC precision machining, HKAA ensures each gear can handle extreme loads and high RPM conditions without deformation or failure.

4. Case Study: Custom CNC Oil Pump Gear for Racing Application

Client: Australian racing modification company
Material: 4340 Alloy Steel
Process: CNC machining + heat treatment + grinding + nitriding
Challenge: Oil pressure fluctuation at high RPM
Solution: HKAA redesigned and machined a high-precision oil pump gear with optimized tooth geometry.

Result:

• Oil pressure stability improved by 15%

• Reduced wear and heat generation

• Client reported enhanced reliability during long-distance races

Client Feedback:

“HKAA’s CNC machining quality and surface precision exceeded our expectations. The gear performed flawlessly even under racing conditions.”

5. Why Choose HKAA for CNC Machining of Automotive Parts

• Advanced Equipment: 3-, 4-, and 5-axis CNC machining centers.

• Material Expertise: Steel, aluminum, titanium, and stainless steel.

• Strict Quality Control: ISO9001:2015 standard with 100% inspection.

• Customization: Support for OEM/ODM and small-batch prototype runs.

• Global Supply: Reliable shipping to the USA, Europe, and Australia.

Our CNC machining services not only deliver precision but also reduce production costs through optimized tooling and process design.

6. Conclusion

The NISSAN TB48 CNC machined oil pump gear is more than just a component—it’s the heart of the engine’s lubrication system.
At HKAA, we combine advanced CNC machining technology with high-performance alloy steel to deliver components that meet global automotive standards.

If you are looking for a reliable CNC machining manufacturer for automotive engine components, contact HKAA today for custom solutions.

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