The wrench flats milled onto a mandrel body which facilitate screwing the mandrel assembly onto the mandrel rod of the tube-bending machine. These flats are typically on the end of the mandrel body opposite of the nose, although they occasionally appear in the middle of the body. The specification for wrench flats usually varies with the threading of the mandrel body to ensure that the cross-section between a flat and the major diameter of the thread is as thick as possible.
FREE Tube-Bending Guide Download:
A complete guide to the principles of the 4-Step set-up for tube-bending tools
This is a printable handbook showing how to implement in four standardized steps the “forward mandrel” set-up for rotary-draw tube-bending machines and establish process control over the so-called black art. The procedure is based upon the guiding principle that the tools make the bend and takes advantage of the inserted design of modern mandrel tooling.