Auxiliary material
Magnet Bonding Adhesive
✓ Expert reviewed All content on this page has been reviewed by a senior motor engineer.
Process flow
Upstream manufacturing of this bought-in item is not covered yet; see the incoming inspection and approval tests.
Incoming inspection & approval tests
- Shear strength (room / high temperature)ISO 4587
- Residual strength after heat ageinge.g. 150 °C × 1000 h
- Strength after thermal shockAgreed per duty
Buyer FAQ
- Anaerobic, epoxy or acrylic adhesive?
- Anaerobic adhesives cure fast between close-fitting metal parts and are common with an activator. One-component heat-cured epoxies give the highest strength and temperature resistance. Two-part acrylics cure at room temperature and tolerate oily or plated surfaces.
- What strength do I need?
- Enough to hold the magnets against centrifugal force and torque at maximum speed and temperature, with a safety factor. Check shear strength at the maximum operating temperature, not only at room temperature, and consider a retaining sleeve for high-speed rotors.
- Does the magnet coating affect bonding?
- Yes. Nickel, zinc and epoxy coatings bond differently; validate the adhesive on the actual coated magnet and rotor surface, and keep surfaces free of oil and dust.