Bend Radius For Sheet Metal Rule Of Thumb

If you re working with 304 stainless steel multiply its median percentage value 21 percent by the die opening.

Bend radius for sheet metal rule of thumb.

Distance from outside mold line to the bottom of the cutout should be equal to the minimum flange length prescribed by the air bend force chart. 4 0 5 2. Usually the preferred distance between holes and a bend is 1 5 times the sheet thickness plus the bend radius 1 5 t h. 0 972 0 16 the inside bend radius changes to 0 155.

The sheet metal design rule of thumb in this case is. If the material is 0 5 in. Choose a bend radius that matches your minimum bend. The inside bend radius should be equal to the thickness of the material that you re forming.

If the die opening is 0 972 in. In order to develop the flat pattern we add 457 to 1 625 and 2 625 to arrive at 4 707. In other words if you re bending 1 8 sheet use a tool with a 1 8 radius to form the inside of the bend. In our example below a part with flange lengths of 2 and 3 with an inside radius of 250 at 90 will have leg lengths of 1 625 and 2 625 respectively.

So if the metal plate is 75 thick you would multiply 4 x 75 3 so your minimum inside bend radius would be roughly 3 times the thickness of the material in this case or 2 25. Supplying 3d models without considering these factors increases the. For bends notches must be at least 3 times the material s thickness plus the bend radius. Now multiply that answer by the plate thickness.

Determine your minimum bend by measuring the distance from your closest feature i e. Minimum sheet metal bend radius depends on the selection of tool and the process. Here s a good rule of thumb for most materials. When we calculate the bend allowance we find that it equals 457.

If you re bending 0 020 thick material use a 0 020 radius. 5 1 4. 0 551 0 16 the inside bend radius changes to 0 088. The distance between the sheet metal bend line and edge of the hole should be two times or greater the thickness of the sheet metal.

If you have any questions or want to discuss your design contact us. Minimum sheet metal bending radius. Note that this is just a rule of thumb. Next subtract 1 from that answer.

A cutout or the edge of your flange to your bend. If the die opening is 0 551 in. So in this case the minimum inside bend radius is 2 times the material thickness. Tabs must be at least 0 04 inches 1 mm from one another or the material s thickness whichever is.