Best Way To Punch Holes In Sheet Metal

How to punch a hole in metal 1.

Best way to punch holes in sheet metal. The wooden bread layers of the sandwich keep the sheet metal flat and prevent the drill bit from wandering as it bores through the sheet metal. Twist drills are great for small diameter holes. It punches first with the smaller punch say 9 8 mm in diameter and then follows it with a larger postpunch like with a 10 mm diameter tool. Special drill bits suitable for sheet metal exist but are difficult to find.

We ll start by marking precisely where the punch hole will be in the metal. Punching holes is an easy and effective method but one has to have a punch for every required diameter and shape and punches are expensive. How to work with sheet metal. This punch is the best all around sheet metal punch we offer but it does still require some labor effort to punch holes.

Alternatively if a sheet has symmetrical hole patterns you may be able to punch half the sheet flip it over then punch the other half. Pneumatic metal hole punch if you need a quick way to make punches in metal close to the edge than a pneumatic punch flange tool is the quickest and easiest we offer. With some punches it s difficult to. When hole shaving the machine uses the same die size but two different punch sizes for the same hole.

The usually have a rake angle close to 90 and a point angle figure below also around 90 instead of the classic 118. This strategy also can mar the sheet though so it may not be practical if the punched part is cosmetic. Using a step drill bit. Ares 10005 metal hole punch set 3 32 inch to 9 32 inch punches and dies included for aluminum brass and steel sheet metal and more 4 7 out of 5 stars 19 27 42 27.

This tends to equalize the sheet stretching of both halves. You can then use a. Always use a clamp or three. Make a dimple dent to guide your punch or drill.

Your first step should always be to locate the centers of all the holes you will need to make. Why make this little dent. Measure and mark your metal.