CNC Machining

CNC Wheel Spacer Adapter — Custom Bolt Pattern Conversion

Q: Do you make custom wheel adapters in any bolt pattern?

Yes, we manufacture adapters in any bolt pattern configuration (4×100, 5×112, 5×114.3, 5×120, 5×130, and others). Each adapter is individually designed based on the client's hub and wheel specifications.

Q: What material do you use for wheel adapters?

We typically use 40HM (chromium-molybdenum) steel for superior fatigue resistance. On request, we also produce adapters from 7075-T6 aerospace aluminum — lighter but equally strong.

Q: What is the minimum safe adapter thickness?

The minimum safe thickness is 12 mm for steel and 15 mm for aluminum. Optimal thickness depends on the bolt pattern and intended load — we determine this individually for each order.

Precision CNC-turned and milled steel adapter for wheel bolt pattern conversion. Mounting holes machined with ±0.02 mm positional tolerance.

CNC Wheel Spacer Adapter — Custom Bolt Pattern Conversion

Technical Specifications

Material: 40HM (Cr-Mo) steel
Thickness: 15 mm
Input pattern: 5×114.3 mm
Output pattern: 5×120 mm
Concentricity: < 0.01 mm
Hole positional tolerance: ±0.02 mm
Surface flatness: 0.005 mm
Machining: CNC turning + milling + grinding

Challenge

A motorsport client needed an adapter to mount 5×120 wheels on a 5×114.3 hub. The adapter had to maintain full concentricity, withstand dynamic loads at track speeds, and have minimal thickness to preserve suspension geometry.

TMT Solution

We designed the adapter from a single piece of 40HM (chromium-molybdenum) steel at 15 mm thickness. CNC turning achieved centering ring concentricity below 0.01 mm. Mounting holes were milled with positional tolerance ±0.02 mm. Mating surfaces were ground to 0.005 mm flatness.

Result

The adapter passed dynamometer testing at speeds equivalent to 280 km/h with no axial runout. The client ordered a complete set of 4 plus an additional batch with a different pattern (5×112 → 5×120) for a second vehicle.

Related service: CNC Machining →

Frequently Asked Questions

Do you make custom wheel adapters in any bolt pattern?

Yes, we manufacture adapters in any bolt pattern configuration (4×100, 5×112, 5×114.3, 5×120, 5×130, and others). Each adapter is individually designed based on the client's hub and wheel specifications.

What material do you use for wheel adapters?

We typically use 40HM (chromium-molybdenum) steel for superior fatigue resistance. On request, we also produce adapters from 7075-T6 aerospace aluminum — lighter but equally strong.

What is the minimum safe adapter thickness?

The minimum safe thickness is 12 mm for steel and 15 mm for aluminum. Optimal thickness depends on the bolt pattern and intended load — we determine this individually for each order.

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