User guide

C-3 l Appendix
All about Cutter Bushings
Cutter bushing shear surface quality
Similar to a dull pair of scissors, if the cutter bushing shear surface is not sharp the
tube or profile is not supported to the side of the blade and the cut will not be
clean. In some cases, the entrance of the downstream cutter bushing is slightly
radiused to minimize jamming. While this practice helps accommodate bushing
bores that are not quite aligned, it has a negative effect on cut quality.
• The shear surface of both the upstream and downstream cutter bushings
should be sharp and bored to the same size. NOTE: In high speed cutting
applications, the downstream bushing is sometimes bored 0.005” larger
than the upstream bushing to minimize jamming. Deburr the edge after the
boring operation, but be careful to remove only the burr and not the edge.
• Leave a minimum land of 1/8 - 1/4 inches on the face of the cutter bushing
beyond the bore. Angle the rest of the bushing face with a 10-15 degree
lead-in.
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