Grizzly Grinder Mod belt speed

[dan adams1953]

while i was in the process of putting the variable speed mod on my grinder i realized that there was an easier way to slow down my belt , wich is all i was really looking for.


the principle is very simple , smaller pulley = slower belt (you already knew that ..)
the only problem i ran unto was the length of the neck .. just loosen the bolt and slide it up .. just put one bolt back in .. save the other for later





this is how my grinder turned out.

[markd]

Looks like one of those clown bikes with the small wheels. How much slower can you go??

[Mike Routen]

Dan, can you tell me where you got that smaller wheel?!? I've been struggling with my Grizzly being too fast and that is an outstanding solution!

Thanks in advance,

- Mike

[dan adams1953]

Originally Posted by Mike Routen

Dan, can you tell me where you got that smaller wheel?!? I've been struggling with my Grizzly being too fast and that is an outstanding solution!

Thanks in advance,

- Mike

the wheel is two 1x4" wheels from a machine they tore up at my last job. I used a lathe and cut out a recess for the washers. I had to use bushings on the bore.

[dan adams1953]

Originally Posted by markd

Looks like one of those clown bikes with the small wheels. How much slower can you go??

I don't know how that comes out in fps, but it cut dive speed down to 875 rpm. I guess
a 2" wheel might have to be custom made. however there might be casters that would work.

[Ray Rogers]

If the original wheel was 8" and the new wheel is 4" then the belt speed has been cut in half. The rpm however has not changed.

MSC has a good selection of 2" wide rubber coated wheels that are used on heavy dollies. Almost any axle size is available and they are cheap but some modification may be needed to attach them solidly to the motor shaft since these wheels are designed to rotate freely on bearings....

[gb6491]

Nice work Dan! Would it be ok if I put the photos of your modification in an album here?
Regards,
Greg

[dan adams1953]

Originally Posted by gb6491

Nice work Dan! Would it be ok if I put the photos of your modification in an album here?
Regards,
Greg

yes thats ok
that's a great group

[gb6491]

Thanks Boss!
Regards,
Greg

[gb6491]

Dan,
By the way; what do you have attached on the upright (where the platen would be) in the first photo? Sorry I didn't notice that sooner
Regards,
Greg

[Matt Walker]

Hey guys. Be careful when running an unknown wheel for the first time. My grinder uses a 10" wheel from Tractor Supply. Luckily, we tested it on a big lathe with a brake.
It ran great up to somewhere just above 1200 rpm. At that point the tire expanded and tried to leave the wheel. If the lathe hadn't been shut down fast, the heavy tire would have been loose at something over 1200 rpm in a small block building with me and a friend. It works great as a shop grinder as long as I don't run it too fast. Picture here
http://elliscustomknifeworks.com/ in the forge gallery. The wheel certianly isn't as goood as a real contact wheel but it was only $15.00.

Matt.....

[dan adams1953]

Originally Posted by gb6491

Dan,
By the way; what do you have attached on the upright (where the platen would be) in the first photo? Sorry I didn't notice that sooner
Regards,
Greg

just trying to make a diamond g style platten.