Working with Neodymium Magnets
Which Magnet Shape Should I Choose?
Start with how the magnet mounts. Discs and blocks glue in, rings and countersunk magnets take screws, and pot magnets hold hardest.
Can the Heat From a 3D Printer Damage Neodymium Magnets?
Usually not for PLA and PETG prints. Beds above 80 °C, heated enclosures, annealing and direct nozzle contact are the real risks.
How Much Clearance Should I Leave for Magnets in a 3D Printed Hole or Pocket?
Add 0.1 to 0.15 mm to the diameter for a press fit, 0.2 to 0.3 mm for glue, and 0.1 to 0.2 mm to the depth. Resin needs less. Test first.
What Are the Best Magnets for 3D Printing Projects?
Small N52 discs in metric sizes are the go-to: 6 × 2 mm for Gridfinity and lids, 6 × 3 mm or 1/4 × 1/8 Inch for more hold, 10 × 2 mm for panels.
Is Magnet-to-Magnet Stronger Than Magnet-to-Steel?
Touching, they're about equal. Through a gap or on thin steel, a magnet pair holds far more. Steel plates win on cost and easy alignment.