I posted my surface grinder attachment that I built for my 2x72 belt grinder a few months back. It had a couple of problems that I wanted to address, so I decided this past weekend to make some modifications. Here's what the attachment looks like now.
I took the time to grind down the table so that it would be parallel with the contact wheel. I then put it through its paces. I grabbed a scrap piece of steel, purposefully ground it all out of shape and gave it a run on the newly modified attachment. It worked absolutely perfect! After proving that it would work on the scrap piece of metal, I grabbed the hardened blade that I had on my bench for the Guardian folder that I started some time ago and mounted it up. I took the surface finish up to 600 grit and took the blade over to my bench to test the thickness. From tip to tang, there was only about a 0.5 thou variation. I'm not sure the kind of tolerances are built into a standard surface grinder since I've never used one, but I can certainly live with 0.0005. This should help me to significantly raise the bar on the fit and finish of my future knives. I look forward to using it more.
I hope this inspires other knife makers to try something similar in their shops. Thanks for stopping by the Robinson Edge.
- Brandant Robinson