Minimum Sheet Metal Thickness For Countersink

2 2 the minimum distance between a counterbore to an edge should be four times the thickness of the metal sheet.

Minimum sheet metal thickness for countersink.

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. The two pieces of metal to be attached are 1x1x1 16 box tubing and 1x2x1 8 box tubing. The minimum distance from a counterbore to an edge is four times the material thickness. Keep in mind that the surface area for the head support is reduced and the strength calculation must be adjusted accordingly.

Typical countersinking dimensions for blind rivets are shown in table 22 3. Because sheet metal parts are manufactured from a single sheet of metal the part must maintain a uniform wall thickness. Bends specified as angles may be toleranced at plus or minus one half degree at a location adjacent to the bends. 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 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. 2 3 the minimum distance between a counterbore to a bend should four times the thickness of the metal sheet bend radius. The countersink will happen in the 1x2x1 8 box tubing. Do not remove edge of hole on blind side of joint.

That means that a 100 3 16 rivet or screw for example can t be countersunk into a top member that s less than about 0 100 thick. In this case h ln 500. Sheet metal parts with a minimum of 0 9mm to 20mm in thickness can be manufactured. Sheet thickness that can be machined for 100countersink rivets is given in table 22 4.

A bigger screw thread clearance hole is required as din or iso forces. 2 3 countersink penetration limitation into the top member and consequently none in the next. It s the most elegant solution so far yet brings up a question. One is to use countersunk bolts in 4 locations to alleviate the issue.

I forgot but i seem to recall a max. The minimum full thread tapping depth h for through and blind holes without a countersink is equal to the insert nominal length ln.