The part
A worm is a threaded shaft that drives a worm gear. This one is small, with a Ø2 mm bore. It is made for a customer who is not named here.
The requirement
The thread must be cut cleanly on a very small diameter. The Ø2 mm bore must stay within 0.01 mm. At this size, both depend on a careful setup and careful measurement.
Illustration model, not the customer’s part
Illustration model of the part
- Process
- CNC turning
- Material
- Finish
Arrow keys turn the part. Home resets the view. Number keys select a feature.
The process
The worm is turned in house, with the thread and the bore made on the same part. A first-article report comes before production. Each lot is released through outgoing inspection, sampled to GB/T 2828.1-2012 and measured with a micrometer and a profile projector. Where the part needs plating or another finish, partner suppliers do it.
What the customer receives
The parts and the outgoing inspection report for the lot.
Result
The Ø2 mm bore can be held to 0.01 mm.