JohnMartin
Hot Rolled
- Joined
- Jul 8, 2006
- Location
- Cumberland, Maine
I've always sent woodworking jointer and planer knives out for sharpening. But, now with a surface grinder, I'm wondering if I can't do it myself. Couple of questions, though.
1. I'd be grinding without coolant. Knives are HSS, .125" thick. Can I get away with dry grinding (light passes, freshly dressed wheel) without burning the edges?
2. Any recommendations as to best wheel grade to use?
3. Better to hold the blade flat and use a wheel dressed at the proper angle, or make up a jig to hold the blade at an angle and use a square dressed wheel? 12" knives would be too long for a sine plate, so I was thinking about making up a jig with a long pivoted bar to which I would clamp the knife. Pivoted at the ends, or maybe resting on dowel pins as with a sine plate. Set screws as jacks to adjust angle, and top face milled back to support and locate the heel of the blade. Any other ideas?
Thanks, John
1. I'd be grinding without coolant. Knives are HSS, .125" thick. Can I get away with dry grinding (light passes, freshly dressed wheel) without burning the edges?
2. Any recommendations as to best wheel grade to use?
3. Better to hold the blade flat and use a wheel dressed at the proper angle, or make up a jig to hold the blade at an angle and use a square dressed wheel? 12" knives would be too long for a sine plate, so I was thinking about making up a jig with a long pivoted bar to which I would clamp the knife. Pivoted at the ends, or maybe resting on dowel pins as with a sine plate. Set screws as jacks to adjust angle, and top face milled back to support and locate the heel of the blade. Any other ideas?
Thanks, John