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PTX 60 grit Grinding stone bit, Pack of 5
DiscontinuedUnfortunately, we no longer stock this item.
This PTX grinding stone bit set is for sharpening & grinding metaland.
Poorly made - out of alignment
NM2 - 10 months ago
Had hoped these were just what I was looking for, but having tried both the parallel cylinder stones, both are out of true and parallel alignment with their shafts. This results in an eccentric motion, which is just about usable in a drill, but terrying and dangerous when tried in my router at 26,000rpm! (though the router motor unit is designed for this purpose).
Rich63 - 4 years ago
I used the largest size stone to grind the edge down on a 3mm wide steel edge without applying excessive pressure and glue between the shaft and the stone failed within a few minutes of use.