They have finishing washers you could use for your purpose instead of having to countersink the thin metal sheet unless you want the screw head flat level with the surface.
Countersink thin sheet metal.
And in doing so your screw joint may be weakened.
Rocaris 3 piece 1 4 hex 12 16 19mm countersink bore set for wood metal quick change bit pack in metal box.
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Mar 2 2005 5 038 1 0.
Punch the hole drill the sink deburr.
You may want to leave the head a bit above the surface of the sheet metal.
The old way to make a countersink was a three step process.
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It eliminates the labor intensive drill and deburr operations.
Here is a web address for a chart that will help with variables such as.
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If you must have the screws flush or a bit below then the depth stop is critical as you will need to stop the cs cutter when the screw head seats just a few thousanths below the surface.
The die shown at the left allows the punch and die to bottom the countersink shape into the workpiece at the bottom of the stroke due to the nature of this style material will deform and a burr will occur.
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.
Three step processes like this cost unnecessary time and money.
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.
Apr 14 2005 13.
Sheet metal countersink chart choose from a variety of standard countersink options which can either be formed or machined into sheet part parts.
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No c sink needed no metal removed from the sheet metal and more strength at the area of the screw head.
The machined type of countersink is used in a or b series standard units for countersinking up to 10 gage material.
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.
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Hardware diameter countersink angle through hole diameter sheet.
