A C101 copper coupling is used where conductivity, corrosion resistance and a clean machined finish matter without heat treatment. This page covers C101 copper coupling produced for hydraulics: high speed turning and milling of free-cutting brass and copper. Every unit is supplied to drawing rather than to a catalogue description, and M12 threaded body is the starting point rather than the limit.
In practice the difficulty is rarely the nominal size. ±0.02 mm is held on the features that locate the part in the assembly, and the process is set up so that the first piece and the five hundredth measure the same way.
Specification
| Process | High speed turning and milling of free-cutting brass and copper |
|---|---|
| Material / configuration | C101 copper |
| Size / capacity | M12 threaded body |
| Tolerance | ±0.02 mm |
| Surface finish | as machined, polished or plated |
| Application | coupling for hydraulics |
| Inspection | Dimensional report, material certificate, first article report on request |
| Lead time | 7–15 working days for samples, 3–4 weeks for production |
| Minimum order | 1 piece for prototypes, from 50 pieces for production pricing |
Manufacturing process
Production begins with a drawing and material review. Stock is certified, the operation sequence is fixed, and high speed turning and milling of free-cutting brass and copper is carried out on equipment maintained to hold ±0.02 mm over a full shift, not just on a first piece.
Material is purchased against a certificate and checked on receipt, so the composition is known before any cutting starts. Work in progress is identified by part number and operation, and the finished parts are deburred, cleaned and protected before they leave the machine area.
Typical applications
Most of the work supplied in this category falls into the following examples.
- Plumbing and pneumatic fittings.
- Electrical terminals and contacts.
- Valve and pump components.
- Instrument and gauge bodies.
- Heat exchanger connectors.
Quality control and documentation
Inspection is not a final formality. Dimensions are checked during the cycle and again at the end, so drift is corrected while there is still stock to remove.
Material certificates to EN 10204 3.1, dimensional reports and first article inspection reports are issued with the shipment where the application requires them. Calibration dates and measurement uncertainty are recorded alongside every result.
Ordering, lead time and packaging
Orders start from a single piece. Samples are quoted from the 3D model, and production pricing follows once quantity, finishing and inspection are agreed.
Frequently asked questions
Why is brass preferred for fittings?
It machines freely, holds pressure tight faces and threads, resists dezincification in the right grade and needs no protective coating in normal service.
Can copper be machined to close tolerances?
Yes, but it demands sharp tooling, generous coolant and controlled speeds because it is soft and tends to smear rather than cut cleanly.
Can you supply material and inspection certificates?
Yes. Material certificates to EN 10204 3.1, full dimensional reports, first article inspection reports and, where required, PPAP or AS9102 documentation are issued with the shipment.
Send the drawing or the 3D model for a quotation. Include material, quantity, tolerance and finish, and a detailed quote with lead time is returned within one working day.
