Views: 0 Author: Site Editor Publish Time: 2026-01-13 Origin: Site
1. Check Magnetic Strength
Use a pull force tester to measure the attraction force; high-quality magnets offer stable, strong pull force matching the labeled grade.
2. Inspect Surface & Coating
Premium magnets have smooth surfaces without scratches, chips or rust. The coating (Ni-Cu-Ni, epoxy, etc.) should be uniform and tightly bonded.
3. Verify Dimensional Accuracy
Measure size with a caliper. Qualified magnets strictly follow design specs, with minimal deviations that won’t affect assembly.
4. Test Temperature Resistance
Expose the magnet to its rated temperature range. High-grade magnets retain magnetism without obvious attenuation after cooling.
5. Assess Consistency
For bulk purchases, sample-check several units. Consistent performance across samples indicates reliable quality.
