When using a dovetail fixture after machining the workpiece, is it normal for the material on the dovetail protrusion to sometimes distorted from the clamps?
Yes – it does occur when you machine softer materials, such as Aluminum.
See the two photos below of an aluminum body that display some clamp distortion in two places from the clamps. If it looks like this then you do not have to be concerned (it is normal). When you run harder materials, such as heat treated 17-4, there is no distortion from the clamps.
Be sure that you do not over-tighten the clamps. If you over-tighten the clamps you can crack or damage your workpiece and/or the fixture. The proper torque information is available on our Web Site.
NOTE: Clamps must be tightened between 120 and 175 inch pounds of torque.
DO NOT EXCEED 200 Inch Pounds.