Minimum Bend Radius For Sheet Metal Parts

When designing sheet metal parts and enclosures it is helpful to use these values as the basis for your design.

Minimum bend radius for sheet metal parts.

Bend radii minimum bend sizes. Sheet metal parts with a minimum of 0 9mm to 20mm in thickness can be manufactured. Supplying 3d models without considering these factors increases the chance. Layout method sheet metal stretches when it bends is an oversimplification.

Each and every bend in a piece of sheet metal has a certain minimum internal radius that needs to be taken into account when planning the design of a sheet metal form. Usually the preferred distance between holes and a bend is 1 5 times the sheet thickness plus the bend radius 1 5t h. We recommend a minimum bend radius of 1t for all sheet metal parts. For example if the thickness of the sheet is 1 mm the minimum bend radius should be 1 mm.

Bend radii minimum bend sizes. Bends in sheet metal are manufactured using sheet metal brakes. Crca inside bend radius equal to 0 65 times of sheet thickness is also enough. For bent sheet metal variation in the raw material thickness increases the recommended precision to 0 010 in.

If a piece of material is bent too tightly problems can occur. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. Below is xometry s minimum bend radius reference table which is based on. The problem with bending too tightly.

A 1 degree tolerance on all bend angles. Minimum bend radius for sheet metal parts. Recommended inside bend radius for sheet metal parts should be equal to material thickness. Height of arc 2 material thickness 2 inside radius 0 201 2 0 01562 inside bend radius 0 201 0 031 0 170 in.

Posted by product design engineer on november 23 2009 at 1 55pm in mechanical engineering. Upon close examination of the bends we find that the sheet metal stretches on the outer surface and that the inside surface seems to shrink. Now we take the height of arc value for our new bend angle and we plug it into the following formula. Use this document to choose values that are both manufacturable and meet your needs.

But for harder materials e g. Thus the smallest radius of any bend in a sheet should be at least equal to the thickness of the sheet. I ve seen a few things online suggesting 1 5 x material thickness. When designing parts for laser cutting one should not make holes smaller than the thickness of the material.