Grinder in a box! DIY grinder kit

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With the VFD you are going to get that motor would work great. You would want the 1700rpm motor if you are going single phase.
 
Wloch248,

Does it have the proper shaft diameter and is it set up to mount (key?) the drive wheel? I cannot tell from the picture or the specs.

Thanks for the help!
 
That motor will work nicely. It's a 56c frame, so everything will line up properly.

With single speed motors, I would still go 3450 rpm instead of 1725.

Jamie
 
exd3686 said:
... and how does the drive wheel mount to the shaft?
Click to expand...

If you use the same drive wheel that PolarBearForge links to from his website, it is listed as:
bored for a 5/8" shaft and 3/16" keyway
Click to expand...

so the 5/8" diameter shaft on the motor needs to look something like this (picture ripped from the internet) to keep the drive wheel fixed to the shaft:
keyway.jpg


The keyway is a lot harder to see in this picture of the actual drive wheel from usaknifemaker (which is the site polarbearforge links to for the wheels):
power-wheel-450.jpg
 
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CanFire,

Thanks for the clarification. When looking at motors on-line the specs usually don't mention the 5/8" shaft or 3/16" keyway. Is there a way to find this via the specs or should I just resort to e-mail and phone calls?

Thank you!
 
It wasn't clear to me either so I just got finished talking to a millwright friend of mine. You can order custom industrial motors and if you're buying used then you need to watch out, but custom motors are rare and the majority are built to industry standards: a standard 56C motor will have a 5/8" shaft and any standard motor with a 5/8" shaft will have a 3/16" keyway. This is why the online retailers probably don't bother listing those details - they assume we already know about these standards. :D
 
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Is it possible to only buy the mulitplaten? There is a metals company that might be able to cut some steel to the blueprints from the Blindhogg website, but I don't see blueprints of a platen on his site.
 
My GIB is now ordered and paid for. I'm also waiting on delivery of the motor, it's a Dayton TEFC 1.5 HP/ 3450 rpm/ NEMA 56C with a 5/8" shaft.

My question: my motor has a shaft length of 1-7/8". Is that long enough?
 
Yes that was me strahd71
But I still don't see it here lol

that's OK looks like it'll be fine
 
I am a little confused on the whole frame size thing. I know that the grinder is designed around a 56C frame, but can it be modified to fit other motor frames? The reason I am asking is because the motor I was looking at getting, Baldor M3554T, is a 145TC frame, I have found a 1.5hp 56C framed motor but I am not sure if it is a 3 phase yet. I want to run a VFD so I will need a 3 phase to the best of my limited knowledge.

So the second motor was a single phase, so the search for a 3 phase cheap motor continues.
 
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According the information I found, you should be able to use it without modifications. It's face mount, and the bolt circle is the same.

Wayne Coe is selling motors and vfd's now.

Jamie
 
Thanks for the info, I am still chasing down motor leads. I would really like to get everything together for the new year when I can start making knives again
 
So I picked up a barely used Leeson 1.5hp 3 phase on the weekend for $50, score. Now like Tippet, I am wondering about the shaft length. The shaft on my motor is 1.9" long, with a .5" plate to pass through and leaving a .25" gap between the drive wheel and the plate there is only 1.15" of shaft to engage the drive wheel. Are the set screws on the drive wheels offset and is that enough engagement between the shaft and the wheel?
 
You should be fine. It all depends on the drive wheel you choose.

Worst case, if the set screw is dead center, you'd have .15 of the set screw contacting the shaft. Slide it in a bit (about .1) and you'd have a full quarter inch (assuming the set screw is a quarter). Everything will still play nicely this way.

If the set screw is off center, then it's even better. The shaft doesn't need to go all the way through the drive wheel.

Jamie
 
Emphasiski said:
What the heck!?! $50? I can't find any motors worth owning for less than $100!
Click to expand...
I was just browsing Kijiji and stumbled on to it
DSC01817.jpg

DSC01815.jpg

Saved my self a few dollars:D

polarbearforge said:
You should be fine. It all depends on the drive wheel you choose.

Worst case, if the set screw is dead center, you'd have .15 of the set screw contacting the shaft. Slide it in a bit (about .1) and you'd have a full quarter inch (assuming the set screw is a quarter). Everything will still play nicely this way.

If the set screw is off center, then it's even better. The shaft doesn't need to go all the way through the drive wheel.

Jamie
Click to expand...

Thanks, I was just going to order the ones you link to so I can't tell where he set screw is located on them.
 
Thought I would show off my recently finished GIB kit. Finally got it all together and did alittle grinding with it today. Real happy with it and the second tooling arm slot sure comes in handy with a separate toolrest.
Chris
 

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