A draw nut is tightened, which expands the mandrel blocks up a ramp and against the ID surface for positive mounting, self centered and squared to the bore. As the tool bit is fed into the material from the end, a bevel is produced which conforms to the angle predetermined by the angle ground into the bit. Bits are available for practically any material or beveling angle required, and bits can be custom made for any form tooling operation. The clamping method shown uses collets which are drawn into an outer ring with a tapered bore, providing positive, full contact grip. Tube Squaring Tube Squaring produces burr-fee ends, critical for orbital welding.
Feed is parallel to the centerline of the tube.
Saddle style clamping uses two opposing saddles for precise positioning and to prevent tube distortion. This allows a wide range of bevel angle combinations for any compound weld profile, including counterbores. Flange Facing Flange Facing is accomplished by refacing the surface of the flange to perfectly flat and square. By changing bit feed and speed, a wide range of surface finishes is possible, to properly match flange sealing materials. As pipe cutting profiles become larger in size or include complex compound bevel angles and counterbores, time and cost saving benefits of precision machined end preps increase dramatically.