We ll cover the common groups.
Minimum sheet metal thickness tapping.
Thread forming thread cutting thread rolling and self drilling.
Minimum sheet metal thickness for tapping.
1 factors determining the minimum l bending.
For example if a 20 tap is required each thread pitch of a 20 thread per inch tap is 050.
Minimum sheet metal flange bend length is required to avoid cracks in the bending area.
Minimum sheet metal flange bend length 3 x sheet thickness bend radius.
The minimum distance between two counterbores is eight times the material thickness.
As the middle of the v groove is hollow when forming the edge fold must be longer than the hollow section and the specific landing edge size varies in the production of different companies the lower section of v groove is under use for a long time the r angle increases which makes the.
In this case h ln 500.
The minimum full thread tapping depth h for through and blind holes without a countersink is equal to the insert nominal length ln.
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.
The general rule of thumb is to have a wall thickness that is two times the pitch of the tap.
For example tapping standoff threads into a motherboard tray.
To get a good threaded tap how thick should aluminum sheet metal be.
It shall be equal to three times of sheet thickness plus bend radius.
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.
Avoid large sheet metal parts with small bent flanges.
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.
11 17 2009 11 35 am 2.
Determining wall thickness with metric taps is even more straight forward.
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.
If we multiply the 050 by 2 we arrive at a wall thickness of 100.
1 factors determining the minimum l bending.
And break off when they contact metal surface minimum metal thickness 0 06 to be drilled.
