Minimum Sheet Metal Thickness Tapping

Determining wall thickness with metric taps is even more straight forward.

Minimum sheet metal thickness tapping.

11 17 2009 11 35 am 2. Tapping screws especially type a are referred to as sheet metal screws because one of their first applications was in ventilation ducts made of sheet metal. Point length winged drill reamer flute drilling capacity material thickness recommendations steel to steel thickness of material to be drilled in 0 500 2 point 3 point 4 point 5 point 0 500 0 400 0 300 0 200 0 210 0 220 0 250 0 250 0 250 0. The general rule of thumb is to have a wall thickness that is two times the pitch of the tap.

In this case h ln 500. Thread forming thread cutting thread rolling and self drilling. I m guessing 2mm but would 1 5mm suffice. And break off when they contact metal surface minimum metal thickness 0 06 to be drilled.

To get a good threaded tap how thick should aluminum sheet metal be. View profile view forum posts visit homepage. The minimum bend edge dimension l in the figure is the minimum bend edge dimension of one bend edge plus t t is the material thickness and the height h should be selected from commonly used plates such as 0 5 0 8 1 0 1 2 1 5 2 0. We ll cover the common groups.

Minimum sheet metal thickness for tapping. It shall be equal to three times of sheet thickness plus bend radius. Minimum sheet metal flange bend length 3 x sheet thickness bend radius. 1 factors determining the minimum l bending.

For limited material thickness you can decrease the drilling and tapping depths and do one or more of following and still accommodate the full insert length and set it below the. For example if a 20 tap is required each thread pitch of a 20 thread per inch tap is 050. 1 factors determining the minimum l bending. If we multiply the 050 by 2 we arrive at a wall thickness of 100.

The minimum full thread tapping depth h for through and blind holes without a countersink is equal to the insert nominal length ln. In low carbon steel sheet metal the minimum radius of a bend should be one half the material thickness or 0 80 mm 0 03 inch whichever is larger counterbores. For example tapping standoff threads into a motherboard tray. Minimum sheet metal flange bend length is required to avoid cracks in the bending area.

Over time though different types evolved.