Engineering Plastic Machined Parts
POM, PEEK, PTFE and nylon parts machined to ±0.02 mm, insulated and non-marking.
Plastics machined where metal would conduct, corrode or scratch. They move with temperature far more than metals, so we machine to the condition and note the expansion.
How we make it: Precision CNC machining service →
2–4 weeks
25 pieces
ISO 9001:2015 · FDA-compliant grades
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Linear tolerance | ±0.02 | mm |
| Thermal expansion | High - see material | note |
| Max envelope | 600 × 400 × 200 | mm |
| Surface roughness | Ra 1.6 | µm |
| Coolant | Dry or mist where possible | - |
| Moisture conditioning | On request (nylon) | - |
Available Materials
- POM (Delrin)
- PEEK
- PTFE
- Nylon PA6 / PA66
- UHMW-PE
- PPS
Typical Applications
- Insulators and spacers
- Food contact parts
- Wear pads and guides
- Bushings and rollers
- Seals and gaskets
Surface Finishes
- As-machined
- Annealed (stress relief)
- Tumble deburr
- Flame treated (bonding)
- Ultrasonic clean
Industries Served
- Food Processing
- Semiconductor
- Medical
- Chemical Processing
- Consumer Electronics
What drives the price of this part
Derived from the callouts on this page. Where a driver is not on the drawing, it is not on this list.
- Tolerance
- Linear tolerance at ±0.02 mm is the tightest callout this family carries. Tightening a callout is a process decision, not a machining decision: below the standard ±0.005 mm the work moves to grinding or jig boring, and the price moves with it.
- Surface finish
- Surface roughness at Ra 1.6 µm. Every step below the ordinary as-machined Ra 1.6 µm adds a finishing pass; a callout on a face nobody touches is the most common over-specification we quote.
- Order size
- Minimum order is 25 pieces, where setup and tooling are amortised across the batch and per-part cost settles around cycle time and material. Below that quantity the same part costs more per piece, not less.
See how cycle time is calculated in the machining time calculator and what else moves a price in the cost driver reference.
How these parts are inspected
Matched to the callouts above and the instruments actually on the floor.
- Coordinate measuring machine (Zeiss CONTURA G2, two machines, GR&R 8.4% on the critical feature)
- Dimensional report against the drawing, with a 100% check on critical features rather than a sample
- Certificate of conformance and the mill certificate with every shipment
- Surface roughness tester (Mitutoyo) against the Ra callout
The full equipment list, with counts, is on the capability page; the inspection sequence is on quality and inspection.
Questions buyers ask
- Why does a plastic part measure differently after a week?
- Because it is still taking up or losing moisture, and because it grows with temperature. Note the condition you will measure in and machine to that, not to the drawing at 20 °C.
Related part families
Composite & PTFE Bushings
Dry-running composite bushings for dirty, washdown or unlubricated service.
Plastic Gears
POM, nylon and PEEK gears cut or moulded, running quiet and needing no lubrication.
CNC Machined Bushings
Machined bushings, sleeves and spacers with bored IDs held to H7, flanged on request.