I just ran into this situation - at the risk of sounding like i get a
kickback from Oneway - thier Wolverine Grinding system with the
vari-grind attachment thing is totally cool. My Kelton Hollower was
also losing it's bite and I also used a diamond hone...eh....then when
I got the new grinding rig set up I deceided to give it a try on "ol'
Kelton...without the vari-grind, I held the flat side of the tool
tangent to the surface of the wheel and just touched it to create a
burr -then very carfully used the diamond hone across the end of the
tip and the thing cut like new....
just don't take too big a cut on the grinding wheel and it really does
need to be a slow speed wheel. I'm pretty sure that if you had a 6"
rather than the more popular 8" whell, the grind on the edge or face of
the hollower would be perfect...I just haven't gotten that 6" wheel