After some struggling with adapting my LV grinding rest to work with my Kalamazoo belt grinder, I decided for a different approach. Nothing wrong with the LV grinding rest...just not the appropriate application for it. It's meant for a grinding wheel, not a flat belt.
While watching a few knife making videos, something occurred to me. Instead of an angled guide that has to meet the belt, why not a FLAT surface that sits next to the belt? Hmmm.
You see, the problem with a guide that has to angle up to the belt is that knife blades are ground at much lower angles than say, a plane iron. It's difficult to get a more traditional style grinding rest to such a low angle (like...10 degrees or maybe less) against a flat belt. You end up with a guide that has to extend out to the point that it gets really flexy.
A quick call to the local metal supply place, and $30(ish) later, I'm off to the races. Let's just hope it works.
|Here we go. I purchased some 1.5" by 1.5" aluminum angle at 3/16" thick and two pieces of 6" wide aluminum flat: one at 1/4" thick, the other at 3/8". I cut the angle into 6" long chunks, and the flats were cut to 6.5".|
|A quick mock up to get the idea. There will be two rests, one on each side of the grinder.|
|My favorite color, Dykem blue. I need to lay out 4 holes on each angle. Two of them will have 1/4-20 threads on one face and 10-24 threads on the other. The other two angles will have 1/4-20 threads on one face and 1/4" mounting holes.|
|Using my height gage and granite plate, I struck a line on each angle at 3/4".|
|A line was then crossed at 1" from the edge and center punched.|
|The reason a Starrett automatic center punch has such a fine point is to allow it to work with a caliper. (or divider...if we're going to get into semantics)|
|Now we can center punch at that intersection. Easy peasy.|
|I'll admit to a boo-boo. Since I didn't draw out these parts first, and I was just winging it, I forgot that I wanted a couple 10-24 tapped holes in two of the four angle parts. No problem...just move the holes over a bit.|
|The 1/4" plate is for the vertical pieces. Each one requires 4 holes drilled to 9/32".|
|Again with the dividers to set hole spacing.|
|Like I said above, the fine point of the center punch is intended to work with the divider.|
|One rest assembled. The screws through the top are 10-24. The screws through the side plate are 1/4-20. I'll be using #12 wood screw to mount the rest to the grinding bench.|
|Both fixtures together. The idea is to keep them on the same plane. It's been a long day, and I'm happy that I got as far as I did on this project. I'll be mounting them to the grinding table tomorrow and finishing up.|