# PEEK, PTFE & Engineering Plastic Parts — CNC Machined to Drawing

> Sinbo Precision (sinbo-machining.com) machines 27 engineering plastic parts to customer drawing in Dongguan, China — quotation within 48 hours, first prototypes in 7–15 days, from 1 piece. IATF 16949 & ISO 9001:2015 certified.

Machined plastics need different cutting, clamping and cooling thinking than metals — and Sinbo runs both under one roof. We machine PEEK, PTFE, POM/Delrin, nylon, PC, PVDF and UHMWPE from rod and billet to ±0.01 mm, with annealing protocols that keep tolerances stable after machining, from 1-piece specials to volume.

## 27 PEEK, PTFE & Engineering Plastic Parts We Machine

- **PEEK valve seat** — virgin or glass/bearing-filled, ±0.01 mm.
- **PEEK bushing** — annealed for dimensional stability, ID ground.
- **PEEK insulator** — high-temperature service, 260 °C continuous.
- **PEEK seal ring** — turned thin-section, back-up ring sets.
- **PEEK wear pad** — bearing-grade, low-stick-slip finish.
- **PEEK gear** — milled/hobbed, module 0.3+.
- **PEEK roller** — balanced, ID/OD concentric ≤0.01 mm.
- **PEEK fitting (analytical)** — HPLC-style geometry, leak-tested.
- **PEEK nut** — high-temp thread, stress-relieved.
- **PEEK standoff** — insulating hardware, M2.5/M3.
- **PTFE seat** — soft-sealing, ±0.02 mm machined.
- **PTFE bushing** — low-friction, anti-creep designs.
- **PTFE insulator** — dielectric hardware, RF-friendly geometry.
- **PTFE ball, turned and polished** — sphericity ≤0.01 mm.
- **POM gear** — milled, quiet-mesh profiles.
- **POM bushing** — dimension-stable, press-fit OD.
- **POM roller** — light-load conveyor duty.
- **POM slider** — low-friction guide elements.
- **Nylon roller** — MC-cast or extruded stock machined.
- **Nylon spacer** — insulating, length-controlled.
- **Polycarbonate sight disc** — machined + edge-polished, crack-free.
- **UHMWPE wear strip** — profile milled, low-wear faces.
- **PVDF fitting** — chemical service, halogen-compatible.
- **PPS insulator bushing** — high-temp electrical hardware.
- **Turned plastic washer** — any thermoplastic, burr-free faces.
- **Special plastic screw** — insulating fasteners, custom heads.
- **Milled plastic impeller** — PP/PE/POM, blade geometry to CAD.

## Typical Materials & Tolerances

| Parameter | Value |
|---|---|
| Metals | Stainless 303/304/316/316L/416/17-4 PH · brass CW617N, DZR CW602N, CuZn39Pb3 · aluminum 6061/7075/6082 · steel 1018/1045/42CrMo4/16MnCr5 |
| Plastics | PEEK · PTFE · POM (Delrin) · nylon · PVDF · polycarbonate |
| Tolerances | ±0.005 mm on critical diameters · DIN ISO 2768-mK general · ground features ±0.002 mm |
| Surface | Ra 0.8 standard machined finish · Ra 0.4 / Ra 0.2 ground · Ra 0.1 lapped |
| Finishes | nickel / zinc / hard chrome / black oxide / anodizing / PVD via audited partners |
| Documentation | EN 10204 3.1 material certificates · FAI · PPAP Level 3 (automotive) · full dimensional report |
| Order range | 1-piece prototypes · batch 100–20,000+ · 2.6 million parts/month capacity |
| Lead time | quotation within 48 hours · first prototypes 7–15 days |

## Related Pages

- [Plastic parts capabilities](https://www.sinbo-machining.com/products/materials/plastic/)
- [Semiconductor vacuum parts](https://www.sinbo-machining.com/case/semiconductor-vacuum-parts/)
- [Coffee machine parts](https://www.sinbo-machining.com/case/coffee-machine-parts/)

**Request a quote:** send your drawing to leo.pan@sinbo-machining.com — quotation within 48 hours, no minimum order for prototypes.

Last updated: 2026-09-27