For those who like to design and make special hollowing tools, the bits are drilled to take M5 screws.
SHARPENING
We find that the flat cutters are best ground at 10° to 15° to give the best cut.
For shear scraping, the burr created is a vital edge and can be restored by rubbing the edge firmly with a Crown Burnisher or similar hard steel.
After doing this three or four times is best to take the tool back to the grinder to restore the clean burr.
Cutters 6 and 7 are used for hollowing or detail work and are best held in the Cutter Holder and sharpened to 10° to 15°.
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