Strange Lapping Results
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Welcome! / Forums / General Woodworking Discussions / Tools and Tool Maintenance/Restoration / Strange Lapping Results
Hi, I was flattening the back of an old 1″ Marples chisel. I first did it on 80 grit sand paper on thick glass. After about an hour it was done. Then onto 120 sand paper. But when I moved to EZE lap 240 stone, it seemed like it was abraiding the belly only, as if though I haven’t already flattened it. I decided to get back to using sand paper on glass. I had some wet and dry 360 and 600 at hand and the results were great, it just polished the already flattened chisel. But now I tried using the 1200 EZE lap and the same thing happened. It was abraiding the belly only.
I checked the stones then and none of them were actually flat. I checked with 0.003 filler gauge, I didn’t bother further. I checked the glass just in case and it was flat. What should I do? I thought EZE laps should do the job. By the way, I only had them for a few months and I haven’t used them heavily.
What methods did you use to determine the glass is flat and the stones aren’t?