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Thread: making a gasket washer concentric

  1. #1
    Join Date
    Sep 2016
    Location
    Modesto, CA, USA
    Posts
    1,708

    making a gasket washer concentric

    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

  2. #2
    Join Date
    Aug 2012
    Location
    Missouri
    Posts
    1,178
    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.
    Jim

  3. #3
    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?

  4. #4
    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.

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