Precision Metal Turning

Core Advantages

Machining of Hardened Stock

The process covers workpiece hardness up to HRC 55. For a component specified in a hardened condition, the tool and machining route are selected around that condition, allowing the working geometry to be cut in the material condition required for the finished component.

Conductive Metal Bodies

Copper and copper alloys are available for turned terminals and contact bodies. Where current passes through a cylindrical connector, the specified conductive grade forms the electrical path through the machined body and between its designated contact surfaces.

Refined Surfaces for Repeated Contact

Secondary finishing reaches Ra 0.4 µm. On a metal sleeve that repeatedly slides against a mating surface, this refinement reduces prominent turning ridges at the contact zone while allowing other surfaces to retain the finish required by their own function.

Specifications and Parameters

Parameter Item	Technical Index
Metal Processing Diameter Range	φ2mm - φ180mm
Metal Processing Length Range	5mm - 450mm
Metal Processing Accuracy	±0.008mm - ±0.05mm
Metal Surface Roughness	Ra 0.8μm - Ra 6.3μm (can be processed to Ra 0.4μm subsequently)
Metal Material Hardness	Up to HRC 55
Processable Metal Materials	Aluminum alloy, stainless steel, carbon steel, brass, red copper, titanium alloy, magnesium alloy, etc.
Metal Surface Treatment	Anodizing, electroplating, electroless plating, blackening, phosphating, plastic spraying, polishing, wire drawing, etc.
Metal Processing Technology	CNC turning, milling, drilling, tapping, reaming, knurling, slotting, bending, etc.

Customization

Custom Precision Metal Turning

The released drawing defines the component, material condition and final acceptance requirements. We establish the turning route from the supplied stock and reserve the necessary secondary operations for features that cannot be completed by rotational cutting alone.

Customizable Items

• Outside diameter: 2–180 mm

• Overall length: 5–450 mm

• Stepped or tapered external profile

• Bore shape and reamed-hole requirements

• Internal and external thread specifications

• Radial holes, grooves and milled slots

• Anodized, plated, black-oxide, phosphated or brushed finish

Quality Control

Stock identity and hardness are checked before machining. This separates a material-condition issue from a cutting-process issue and keeps the job linked to the specified grade rather than to a generic description such as steel or brass.
First-piece and in-process measurements cover the dimensions affected by cutting-tool wear. Surface and edge checks also follow the cutting operation, identifying built-up material, scoring and burrs that a diameter reading alone would not reveal.
Final inspection is carried out on every part after the specified finishing route. Finished dimensions and visible surface condition are checked separately, and the lot record connects the accepted parts with the drawing revision and inspection results.