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Tool Post Grinder

YYCHM said:
Did you used the measure between pins technique to bracket the dovetail width?
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Somehow or another I missed this question Craig. My apologies.

Yes, but I didn't go crazy. I used two pieces of stainless dowel that are about 0.2" in diameter. Nowhere near precision rod, but I reasoned that precision was not as important as consistency. I also only used a caliper to measure the gap. But again, I figured a caliper was more than enough for this job.

Last but not least, I used my DRO to make sure I was taking off roughly the same amount on both sides. For some reason that I never took the time to figure out, I reasoned that equal amounts on both sides was important. I still don't know if that is true but my gut tells me that it is. Stupid Gut..... LOL!
 
I believe I ordered some 1/4" shaft mounted stones from kbc that were acceptable. The typical die grinder stones in Princess Auto are pure garbage and I've had some that were called 1/4" shaft but in fact were 6mm (not useable in a 1/4" collet)
 
DPittman said:
I believe I ordered some 1/4" shaft mounted stones from kbc that were acceptable. The typical die grinder stones in Princess Auto are pure garbage and I've had some that were called 1/4" shaft but in fact were 6mm (not useable in a 1/4" collet)
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Thank you. I thought I looked there but lemme look again to see what I can find there.
 
I got some nice mounted stones from a supplier in Cambridge a few years ago. Can’t remember which one though, maybe Abrasive Supply & Service? I just walked in one afternoon, looked through their catalogue of shapes and left with a 20 or so and a wheel dressing stone for my bench grinder.
 
Rauce said:
I got some nice mounted stones from a supplier in Cambridge a few years ago. Can’t remember which one though, maybe Abrasive Supply & Service? I just walked in one afternoon, looked through their catalogue of shapes and left with a 20 or so and a wheel dressing stone for my bench grinder.
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If you can remember, it would be appreciated. I get there every so often and that would be nice fruitful adventure!
 
Susquatch said:
If you can remember, it would be appreciated. I get there every so often and that would be nice fruitful adventure!
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Since I walked in I don’t have any emails to reference but I’m pretty sure it was Abrasive Supply and Service.
 
Rauce said:
Since I walked in I don’t have any emails to reference but I’m pretty sure it was Abrasive Supply and Service.
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OK, I'll look them up. I will need a small supply of quality stones. If not for this tool, then for my air die grinder or my Dewalt 20V Rechargeable Die Grinder (which is an awesome piece of equipment).
 
Rauce said:
Since I walked in I don’t have any emails to reference but I’m pretty sure it was Abrasive Supply and Service.
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Is this it? Across the street from a Toyota Dealer?


Screenshot_20220407-154533_Chrome.jpg
 
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Grinding stones another option.
 
Mac tools stopped by and had some small grinding stones on sale so I bought some.

Still looking for 3 to 4 inch wheels for outside grinding. I can make my own arbour for them.

Spin up the motor for the first time yesterday. Smooth as silk and "feels like" it will do the job!

Need to finish the motor holder and also make a chuck jaw expander so I can use the grinder to true up my 3jaw chuck. I'll be doing before and after comparisons when I do.
 
Susquatch said:
Mac tools stopped by and had some small grinding stones on sale so I bought some.

Still looking for 3 to 4 inch wheels for outside grinding. I can make my own arbour for them.

Spin up the motor for the first time yesterday. Smooth as silk and "feels like" it will do the job!

Need to finish the motor holder and also make a chuck jaw expander so I can use the grinder to true up my 3jaw chuck. I'll be doing before and after comparisons when I do.
Click to expand...
I've kind of been bumping around looking for what's available in 3 and 4 inch grinding wheels also and haven't found much. Most of the ones I come across are made for either angle grinder or a hand drill.
Have you figured out that your motor will be adequately able to turn a 4" wheel without exceeding the rpm limit of the wheel?
 
Pretty sure I've seen wheels ~3" range (metric) on Ali or Ebay in various grits & compositions. You'd have to make your own arbor to suite but that's probably preferable.
I ran into this same issue. N-Am wheels are out there but not as prevalent to Canucks, meaning grit/material/thickness. The other thing to start thinking about f you haven already is a reliable/safe/clean way to dress stones in-situ because that has to occur regardless. I know I've posted my setup if you're looking for ideas.
 
DPittman said:
I've kind of been bumping around looking for what's available in 3 and 4 inch grinding wheels also and haven't found much. Most of the ones I come across are made for either angle grinder or a hand drill.
Have you figured out that your motor will be adequately able to turn a 4" wheel without exceeding the rpm limit of the wheel?
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Not really. But it is variable speed, seems to work quite smoothly, and I can reliably measure the speed.

I'm much more concerned about vibration explosion.

At any rate, I'll pay close attention to what the maker says, I won't be buying junk wheels, and I won't be standing in line with them. As I said elsewhere, I've seen what can happen and I'd prefer to stay on the other side of the planet from that!
 
PeterT said:
Pretty sure I've seen wheels ~3" range (metric) on Ali or Ebay in various grits & compositions. You'd have to make your own arbor to suite but that's probably preferable.
I ran into this same issue. N-Am wheels are out there but not as prevalent to Canucks, meaning grit/material/thickness. The other thing to start thinking about f you haven already is a reliable/safe/clean way to dress stones in-situ because that has to occur regardless. I know I've posted my setup if you're looking for ideas.
Click to expand...

The problem with Ali and ebay is quality. I'd prefer to buy a wheel like that from an outfit at risk of being sued. Not that the Ali stuff is really any worse, just I feel safer with something from an outfit with a reputation.

I am quite happy to make my own arbour.

Good point on dressing. Hadn't crossed that bridge just yet. I will try and find your post on that.

I could always make an external dressing rig.
 
Susquatch said:
Not really. But it is variable speed, seems to work quite smoothly, and I can reliably measure the speed.

I'm much more concerned about vibration explosion.

At any rate, I'll pay close attention to what the maker says, I won't be buying junk wheels, and I won't be standing in line with them. As I said elsewhere, I've seen what can happen and I'd prefer to stay on the other side of the planet from that!
Click to expand...
Ya I'm just playing around with numbers dreaming up how I'm going to do my next tool post grinder and sfm, motor torque and safe wheel rpm seem to get all questionable once I get to the "larger" 3-4" wheels. I'm just getting my head around it all now so could be mistaken about everything
 
DPittman said:
Ya I'm just playing around with numbers dreaming up how I'm going to do my next tool post grinder and sfm, motor torque and safe wheel rpm seem to get all questionable once I get to the "larger" 3-4" wheels. I'm just getting my head around it all now so could be mistaken about everything
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I suppose that's yet another reason to buy from a well known outfit. But in any event, I assume you know that rpm normally goes down as diameter goes up.
 
Susquatch said:
I suppose that's yet another reason to buy from a well known outfit. But in any event, I assume you know that rpm normally goes down as diameter goes up.
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Yes rpm goes down with an increase in diameter but power requirement goes up. A motor than can spin a little 1" stone at 30000rpm may not be able to turn a 4" wheel at 7500 rpm. (And/or said wheel may not be safe at 7500rpm)
 
DPittman said:
Yes rpm goes down with an increase in diameter but power requirement goes up. A motor than can spin a little 1" stone at 30000rpm may not be able to turn a 4" wheel at 7500 rpm. (And/or said wheel may not be safe at 7500rpm)
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Agreed. I have no idea about the power or speed at power yet.

About all I can say is that it's one hell of a fast response torquie little motor. We shall see.
 
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