- Joined
- Dec 5, 2013
- Messages
- 1,180
I had another thread on my thoughts and exploits leading up to and acquiring my surface grinder. It can be viewed here if you're interested.
http://www.bladeforums.com/forums/showthread.php/1168232-Surface-grinder-options-Wuertz-attachment-or-modify-a-dedicated-grinder
I ended up buying a exceptionally clean, low mileage Boyar-Schultz 612 manual grinder. It was my intention, from the beginning, to modify the grinder for use with 2x72 belts. After getting the grinder home and setting it up, I used it for a while with grinding wheels to evaluate the machine and develop some grinding knowledge. Since others expressed interest in how I was going to do the belt conversion and because there was not a lot of info available for me to draw from, I agreed to do this work in progress on the conversion. My original plan was to complete the conversion before beginning the WIP thread. I've made a fair amount of progress thus far but have not completed the build. When my contact wheel showed up the other day, I decided that I would start the WIP so those who are interested don't have to wait for me to finish to see where I'm going with the build.
Here's the grinder in the back of my truck when I got it home.
Boyar-Schultz 612 by Ranger_Bob, on Flickr
This is the technical drawing Sunray sent me after I specified what I wanted. You will notice that the wheel is only 1.125" wide. I decided that since my grinder is only 3/4hp, I would split my belts to reduce the contact area and put less stress on the spindle bearings.
6 x 1.125 Contact Wheel by Ranger_Bob, on Flickr
This is a model I did in AlibreCAD. This arm will clamp to the machined portion of the spindle housing where the wheel guard normally resides. The entire arm and contact wheel can be removed, thus returning the grinder to original configuration. I will post the technical drawings for each part as I get to it.
SURFACE GRINDER BELT CONVERSION by Ranger_Bob, on Flickr
These are the components I had to order for this build; an adjustment knob (yes, I could have made this too), a shoulder bolt for the idler wheel, and a high tension spring. The springs don't look like much but will exert right at 80lbs with one inch of compression. They only came in packs of six.
Untitled by Ranger_Bob, on Flickr
One more component I had to order. Took four weeks from order to ship. Sunray has a selection of colors. I liked orange!
Sunray contact wheel by Ranger_Bob, on Flickr
To be continued...
Bob
http://www.bladeforums.com/forums/showthread.php/1168232-Surface-grinder-options-Wuertz-attachment-or-modify-a-dedicated-grinder
I ended up buying a exceptionally clean, low mileage Boyar-Schultz 612 manual grinder. It was my intention, from the beginning, to modify the grinder for use with 2x72 belts. After getting the grinder home and setting it up, I used it for a while with grinding wheels to evaluate the machine and develop some grinding knowledge. Since others expressed interest in how I was going to do the belt conversion and because there was not a lot of info available for me to draw from, I agreed to do this work in progress on the conversion. My original plan was to complete the conversion before beginning the WIP thread. I've made a fair amount of progress thus far but have not completed the build. When my contact wheel showed up the other day, I decided that I would start the WIP so those who are interested don't have to wait for me to finish to see where I'm going with the build.
Here's the grinder in the back of my truck when I got it home.

This is the technical drawing Sunray sent me after I specified what I wanted. You will notice that the wheel is only 1.125" wide. I decided that since my grinder is only 3/4hp, I would split my belts to reduce the contact area and put less stress on the spindle bearings.

This is a model I did in AlibreCAD. This arm will clamp to the machined portion of the spindle housing where the wheel guard normally resides. The entire arm and contact wheel can be removed, thus returning the grinder to original configuration. I will post the technical drawings for each part as I get to it.

These are the components I had to order for this build; an adjustment knob (yes, I could have made this too), a shoulder bolt for the idler wheel, and a high tension spring. The springs don't look like much but will exert right at 80lbs with one inch of compression. They only came in packs of six.

One more component I had to order. Took four weeks from order to ship. Sunray has a selection of colors. I liked orange!

To be continued...
Bob