How To Drill A Hole In Thin Sheet Metal

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How to drill a hole in thin sheet metal.

Old machinist trick i use when i need to drill a big hole in some thin sheet metal. Since this is a small hole a normal drill bit will work well in the sheet metal without extra precautions. To take a piece of cloth rag and fold it to about four thickness s and place it under the drill in the hole and proceed to drill slowly. I saw this one about fifty years ago.

Advance the drill through the thin sheet metal it may be difficult to get the drill to start cutting but a gentle force should be used until the cloth has been pierced taking care not to distort the sheet metal the drill will then advance normally through the metal but the resulting hole will be both round and assuming drill geometry is not miles out the size will be spot on. Place the die over the draw stud before inserting the stud through the pilot hole. Simply sandwich the sheet metal between two pieces of wood and clamp everything down on a table or workbench. Now drill the final hole at the desired diameter with the corresponding twisted drill bit but put a cloth between the bit and the metal.

With the help of a piece of cloth and modulation of drill speed you can machine out perfectly round holes on metal. Amazon affiliate links listed below. To setup the punch first drill a pilot hole into a piece of sheet metal with a step drill bit. The punch is then.

Compare the two holes above in a piece of 050 thk. Make a dimple drill bits can be reluctant about metal. For clean precise holes in thin sheet metal make a wood sandwich. When drilling thin sheet metal clamp the metal over a piece of sacrificial plywood or other flat sheet good like mdf or particleboard to help prevent the bit from tearing up the hole.

The pilot hole will help you positioning the drill bit and than just drill. Just fold the cloth a few times and power on at low speed. For the cleanest hole clamp a second piece on top of the metal making a sacrificial sandwich. Have you ever had to drill through metal.

It works every time rasmus laursen. Drilling holes in thin sheetmetal have you ever tried to drill holes in thin sheet metal using standard drills and ending up with a ragged triangular shaped hole not anywhere near the diameter you wanted and perhaps requiring a trip the medicine cabinet for a band aid.