The default engineering plastic for bushings, gears, wear strips, and general-purpose machine components — Nylon 6/6 offers good strength, wear resistance, and machinability at moderate cost. The critical caveat is moisture absorption: nylon absorbs up to 2.5% water, which dimensions significantly. For tight-tolerance parts in humid service, specify oil-filled or glass-filled grades.
Self-lubricating against steel shafts — standard material for light-duty bushings replacing bronze.
Impact strength significantly higher than Delrin (POM). Preferred for shock-loaded parts.
Ubiquitous in every major stock distributor. Typically 60% the cost of POM and 10% the cost of PEEK.
| Element | Content |
|---|---|
| Nylon 6/6 (PA 6/6) | 100% |
| Common grades | MDS-filled (gray, oil-filled), Nylatron GSM (MoS₂), glass-filled (33% GF) |
Composition per ASTM D4066. Specific mill test reports (MTR) available on request for production orders.
Nylon 6/6 grows ~0.5–1% in humid environments. For tight-tolerance parts, pre-condition to service moisture level before final inspection, or use PEEK/POM.
Cast nylon (e.g., Nylatron MC901) has better dimensional stability and stress resistance than extruded nylon. Cost is slightly higher.
Heavy machining introduces residual stress. Anneal at 140 °C for 4 hours for parts that will see elevated temperature or be close-fit assembled.
Full DFM review by a mechanical engineer. No automated bot rejection. FOB Ningbo or DDP to your door.