Cal West MFG Tube Bending Rules 2025-04-10

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Tube Bending Rules to Know​

Distance of Bend from Coped End​

The distance from the deepest part of the cope or notch should be no less than 3 inches to the start of the bend. This goes for both ends of the tube. Anything less risks deformation or cracking before the bend is finished being formed.

No Features in a Bend​

There can be zero features or markings in the bend of the tube. This includes holes, keys, markings, and other features. These can cause the tube to deform or crack during bending. A good rule of thumb is to leave at least 0.75 inches from the feature to the edge of the bend.

Design with the Correct CLR​

It is critical that you design your parts in CAD to match the correct CLR (Center Line Radius) of the bend. If you do not, the part will not fit correctly and may not be able to be bent at all. We can fix them somewhat, but it's best to send files that match real-life outcomes.

Distance Between Bends​

Leave at least 4 inches of space between bends or rolls. If bends are too close, the clamp die could burr the edge of the tube or affect the previous bend. Check with us if closer spacing is needed.