View Full Version : making a gasket washer concentric

Bill Dufour
05-17-2018, 12:09 PM
I have a set of round gasket punches. When I need to make a washer I punch it with two different sizes and try to center them as best I can. Is there some better way to get them concentric?
Bill D

James Pallas
05-17-2018, 12:15 PM
If you have a set of transfer punches. Put the appropriate size transfer punch inside your gasket punches to center things up. Do the outside first so you don't loose your center mark.

Doug Garson
05-17-2018, 12:35 PM
Do you have a set of forstner bits that closely match the 2 different size punches? Use the center spur to center them, mark the OD of each of the circles around the forstner bits with a pen or pencil and use the circles as a guide to locate the punches. This assumes the washers are too small to use a compass the draw the circles. Once you have one good washer, how about using it as a guide to center the inner punch on the rest?

Frank Pratt
05-17-2018, 2:08 PM
Would the punches fit in a drill press? If so, then clamp the gasket stock stationary & use the press (drill not running) to punch out the center first, then the outside.