Cupped Magnet Sets - Lee Valley Tools

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Description

This design of rare-earth cupped magnet is strong, easy to install and comes as a three-piece set of integral magnet with cup, countersunk washer (for use as a door strike), and high-friction disc.

The magnet can be used as a door catch with a strike or as a magnetic base alone with high-friction film cover but without the strike. The countersunk screw hole in the center of the magnet makes it particularly easy to install or remove. The cups are about 0.005" smaller than their nominal diameters so they fit snugly in a counterbored hole. For many shop uses, they can be attached directly to walls, beams or equipment without any counterbore.

The magnet strengths listed are rated as the average pounds of force required in a straight pull to disengage them from 3/8" thick steel or their companion washers. Recommended sizes of flat-head wood screws (not included) are listed.

  • The 12mm (1/2”) diameter magnet has a cup diameter of 5/8” and a 3/8” plate force of 12 lb/washer force of 9 lb; #4, #5 or #6 screws recommended
  • The 14mm (9/16”) diameter magnet has a cup diameter of 3/4" and a 3/8” plate force of 16 1/2 lb/washer force of 15 lb; #6 screws recommended
  • The 18mm (11/16”) diameter magnet has a cup diameter of 1” and a 3/8” plate force of 35 lb/washer force of 32 lb; #8 screws recommended
  • The 24mm (15/16”) diameter magnet has a cup diameter of 1 1/4” and a 3/8” plate force of 69 lb/washer force of 56 lb; #10 screws recommended

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