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Magnet cups increase a magnet’s attraction, usually by a factor of four. These zinc-plated steel cups are counterbored to fit the rare-earth magnets we sell. The cup for the 1/4" magnet has a ridged outer surface for a press fit into a 3/8" × 1/4" deep hole. The larger cups can be screwed directly to the face of the workpiece or flush mounted in a counterbored hole. The 1/2" and 5/8" cups are 1/4" thick and countersunk for a #4 flat-head screw; the 7/8" and 1 1/8" cups are 9/32" thick and countersunk for a #10 screw (to restrain the larger magnets' greater attraction). No glue is needed; once set in the cup, the magnet has little chance of popping out. To allow future removal of the magnet or cup, first file a slot in the side walls for an access point to pry out the magnet. Sizes stated are the outside diameter.
Sold individually. Made in Canada.
Use the table below to work with fractional inches