Rare Earth Magnets

Select the grade (e.g., N35–N52) based on required magnetic strength — higher numbers mean stronger magnets; then choose shape and dimensions to fit mounting space and hold/load requirements, checking pull force or flux density specifications for compatibility

Keep magnets away from electronics, credit cards, and magnetic storage; wear gloves and eye protection to prevent pinching or chipping; handle strong magnets one at a time and store with spacers or in separate compartments to avoid sudden attraction

Common coatings (nickel, zinc, epoxy) provide corrosion resistance and surface protection; some coatings slightly increase thickness and may reduce magnetic contact, so choose a coating appropriate for the environment (e.g., epoxy for humid conditions)

Use countersunk or through-hole magnets for screw mounting, threaded housings for replaceable inserts, or adhesive bonding with epoxy for low-load applications; ensure the mounting material and hardware are rated for the magnet's pull force to prevent failure

Store magnets separated by non-magnetic spacers or in wooden/plastic boxes to prevent collision and chipping, keep them dry and away from extreme heat, and avoid stacking high-strength magnets directly together without demagnetizing spacers

Surface contact area, gap distance, mating material (mild steel increases force), orientation, temperature, and coatings all reduce measured pull force compared with lab values; expect real-world holding power to be lower than idealized specifications

Prices vary by grade, size, and coating; small hobby magnets start at low prices while larger high-grade or coated industrial magnets commonly range from tens to hundreds of dollars, so compare grade, pull force, and corrosion protection to assess value