How to Choose and Use a Demagnetizer Effectively
What is a Demagnetizer
A demagnetizer removes unwanted magnetic fields from metal parts after machining operations. It uses electromagnetic coils to neutralize residual magnetism in workpieces.
Available Types
- Table-type: Best for small parts on a workbench
- Frame-type: Best for continuous production lines
- Handheld: Best for large items and field use
Choosing the Right Type
For small precision parts, use a table-type demagnetizer. For medium-sized production parts, a frame-type works best. For very large pieces or on-site work, choose a handheld device.
Material Guidelines
Soft Materials
- Low-carbon steel
- Cast iron
- Use lower power setting
Hard Materials
- High-carbon steel
- Alloy steel
- Heat-treated parts
- Use higher power setting
Production Line Integration
- Install frame-type unit on conveyor belt
- Use plastic trays for material handling
- Keep adequate space after the demagnetizer
- Process each part in 5-6 seconds
Results Verification
- Test treated parts with magnetic field meter
- Aim for minimal residual field on precision parts
- Keep records of test results
Safety Tips
- Keep unit away from other electronic devices
- Check grounding connection regularly
- Allow the unit to cool between long runs
