A different QC Toolpost

[olderdan]

Turning hardened steel.
It is possible to turn sintered and Hss steel up to 65 Rockwell accurately with the right tool.
The tool tip required is a CBN (Cubic boron nitride), not cheap but they last a very long time with careful use. If you have an irreplaceable part to refurbish it can be an alternative to grinding with a comparable finish.
Case hardening on old motorcycle parts is usually around .010 thou deep and it is possible to skim off .002 Dia with this method.



Mid range speed and finest feed no coolant.


Make new bushes to suit and good as new.
It is usual to sharpen the top face only on these tips with a diamond wheel (I have only needed to do that once in a dozen usage).