How to CNC-Machine UHMWPE Star Wheels

Overview

This guide covers the practical steps to cnc-machine uhmwpe star wheels. JSLT Engineering Plastics produces engineering plastic components in UHMWPE, HDPE, PA, POM and PTFE — full-process fabrication from raw sheet to CNC-machined parts.

Step-by-step procedure

1. Use sharp carbide tooling. Carbide insert with positive rake; avoid HSS — too soft.
2. High RPM, moderate feed. Surface speed 300–500 m/min; feed 0.1–0.3 mm/tooth.
3. Air-mist cooling preferred. Avoid flood coolant — UHMWPE swells slightly with water.
4. Climb mill final passes. Climb milling gives smoother surface finish on PE.
5. Stress relieve if needed. Heavy machining: post-anneal at 80°C/4hr to relieve stress.

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