Mar 2 2005 5 038 1 0.
Countersink thin sheet metal.
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Get it as soon as thu sep 3.
After drilling a hole in the table for the screw you will be using and the matching hole in the sheet metal use this punch to make a depression in the sheet metal so the screw head sits below the surface of the sheet metal.
Illustration on this page.
Apr 14 2005 13.
When countersinking metal sheet you may enlarge the through hole on the bottom of the sheet too much before you get the hole on the top of the sheet large enough for the screw head to sit flush.
A forming countersink tool works best on thinner materials as it bends the material into the hole to create the sink like coining countersink tools these are available to form down with interchangeable punch tip inserts for cost savings and flexibility and in the self stripping form up style.
And in doing so your screw joint may be weakened.
Machined countersinks are created with a drill press and formed countersinks are made with punch press tooling the best option depends on your project and part geometry.
3 7 out of 5 stars 82.
Rocaris 3 piece 1 4 hex 12 16 19mm countersink bore set for wood metal quick change bit pack in metal box.