Technical Information Troubleshooting Thread Mills vibration marks major crest wear edge chipping cone-shaped thread entry marks cutting speed check reduce — — — feed per tooth check increase reduce — — workpiece clamping improve improve improve — improve machine tool stability improve improve improve — improve cantilever arm shorten shorten — — shorten helix angle increase reduce — — — radial runout check check — — — coating — improve improve — — milling operation — climb mill climb mill climb mill — line feed/entry ramp check check — — improve coolant pressure — check check(>20 bar, 290 psi)(>20 bar, 290 psi)— — widia.com Y107 Technical Information