WIP: Grinder Build

[JasonSCarter]

Holy Smokes!!! I'm building the same thing RIGHT NOW TOO! I glued up and screwed my plywood together Got to order the axle shaft tomarrow. I'm gonna run a 3/4 hp TEFC 1725 rpm but I'm running a 23" contact! Going to use a shop roll abrasive to wrap it with, Gotta cut a small slit a 1" deep and drill a 1/2" hole at the end of the slit, use a peg to keep the roll tight. I'm going to run about 180 - 200RPM (about 1000 SFPM) Should give HUGE hollow grinds also going to set up a jig to keep the blade straight.

Jason

 

[69_knives]

Holy Smokes!!! I'm building the same thing RIGHT NOW TOO! I glued up and screwed my plywood together Got to order the axle shaft tomarrow. I'm gonna run a 3/4 hp TEFC 1725 rpm but I'm running a 23" contact! Going to use a shop roll abrasive to wrap it with, Gotta cut a small slit a 1" deep and drill a 1/2" hole at the end of the slit, use a peg to keep the roll tight. I'm going to run about 180 - 200RPM (about 1000 SFPM) Should give HUGE hollow grinds also going to set up a jig to keep the blade straight.

Jason

Sounds like that will be a cool machine.

How wide will the wheel be; 2"?

If you make the wheel 22" diameter you can use standard 2x72" belts... just cut the belt at the seem and proceed as you were.

 

[69_knives]

Very cool machine, I'm very impressed with your results.:thumbup:

Thanks! Now that the wheels are trued up, it works quite well. I added another layer of the Ultra Black silicone to the large wheel tonight and I think I may do another layer yet which should give me about a 3/16" layer total and I believe I should be happy with that.

 

[drewfacehotm]

It can actually be ground fairly well if you're setup for it. But cutting it? Long strings that get wound around everything and nothing ever ends up flat straight or square. I hate it. I actually hate it. There are three things I actually hate in this world. Funding sackers with entitlement issues, being dictated what to do by the state on frivolous maters, and machining rubber. There... I said it.

we aren't set up with any kind of grinder good for this stuff, i cut some parts to length on the bench grinder though, then did the rest of whatever i could do on the lathe. the viton 80 duro cuts fine but hrbm 80 or whatever is almost not feesable, one time the co. wanted us to make a part with a long 15degx15deg undercut in a 1"bore out of 50 duro! couldn't do it, was not happening at all.