9 Mill Safety

Along with lathes, milling machines are one of the most indispensable tools in a machine shop. Milling machines operate by feeding a rotating cutter into a workpiece. However, they can pose a severe risk if not handled with care and expertise. To ensure a safe and secure working environment, follow these rules adapted from the Canadian Center for Occupational Health and Safety (2018).

1. Wear proper PPE around milling machines. This PPE can include CSA-approved safety glasses, steel toe boots, ear protection, and face shields.
2. Only trained and authorized personnel should operate the milling machine. Ensure all operators have received proper training and certification for lathe operation and safety.
3. Remove entanglement hazards (e.g., loose clothing, jewelry, etc.). Tie back and confine long hair. Never wear gloves!
4. Keep the floor free from obstructions or slip hazards.
5. Keep a clear workspace. Keep hands, brushes, and rags away from the rotating milling cutter.
6. Hands away. Keep your hands well clear of revolving cutters.
7. Ensure that the correct cutting speeds and feeds are being utilized.
8. Always double-check to ensure your machine setup securely holds the work.
9. Ensure tooling and supporting components are firmly tightened.
10. Cleanup after milling. Use a vacuum, brush, or rag to clear cuttings only after the cutter has stopped moving. Never use compressed air.

A safety signoff can be found here.

Below is an 8-minute video discussing general mill safety, mill operation, and emergency shutdown procedures. Be aware that all mills are different and may have unique features. Always consult the operations manual provided by the manufacturer for detailed guidelines.

Below is a short 5 question quiz test your knowledge on milling machine safety.

References

Canadian Center for Occupational Health and Safety. (2018). Metalworking machines lathes. https://www.ccohs.ca/oshanswers/safety_haz/metalworking/lathes.html