Grinder in a Box Motor Questions?

flatgrinder said:
Thanks for the advice everyone.

Planning on building a Bader/ GIB clone that would accept all my KMG accessories, but using 1/8" steel, Delrin and aluminum. It should be possible. Figured a direct drive motor would cut down on weight ... would like the main chassis to weigh less than 45lbs with the motor attached. My KMG chassis (with no motor) weighs approx. 100lbs.
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My GIB probably weights the same as the KMG. Have you looked at the Wilmont little buddy. It's a simple design that you could easily clone that could be made of 1/8" steel/aluminum. It would also accept your your KMG accessories and it's direct direct drive. You could mill a bunch of round holes in both of the main side plates to really lighten it up and I think it would still be quite sturdy. Good luck with whatever you decide to go with!
 
NC Biker said:
My GIB probably weights the same as the KMG. Have you looked at the Wilmont little buddy. It's a simple design that you could easily clone that could be made of 1/8" steel/aluminum. It would also accept your your KMG accessories and it's direct direct drive. You could mill a bunch of round holes in both of the main side plates to really lighten it up and I think it would still be quite sturdy. Good luck with whatever you decide to go with!
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I was going to suggest the same. I can't imagine the frame weighs more than 50lbs without a motor, but I don't have one to verify. I imagine you could build something similar out of 6061 aluminum and save a few lbs yet.
 
Hello everyone,

I am planning on making a GIB 2.0, but like many new to the hobby, I am trying to keep the cost as low as possible.

One saving I am hoping to make is on the motor. I have seen several like this one: http://www.ebay.com.au/itm/171676599933?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT

For a fraction of the cost of any 56C Frame motor I can find. Would something like this be compatible at all? The Polar Bear Forge website doesn't show attaching of the motor to the GIB so it makes me think that as long as it has a base plate I should be ok? Am I crazy for thinking this?

Thanks for your help,

David.
 
Polar Bear Forge has or is working on a smaller, lighter grinder called the single intent grinder. I'll bet its lighter as the GIB is pretty hefty. I run a GIB off a 220v Baldor 1HP motor and it works just fine. I have yet to stall it, or really slow it down even when grinding initial bevels on CPM 154.

Be aware that the called for gas piston on the GIB is not the right length unless he's updated the instructions. It's about twice as long as it should be and the extra length will cause the tracking wheel to not work properly. Be prepared for some serious tapping as the plates are either purposely or accidentally surfaced hardened.
 
nomiakasu said:
Hello everyone,

I am planning on making a GIB 2.0, but like many new to the hobby, I am trying to keep the cost as low as possible.

One saving I am hoping to make is on the motor. I have seen several like this one: http://www.ebay.com.au/itm/171676599933?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT

For a fraction of the cost of any 56C Frame motor I can find. Would something like this be compatible at all? The Polar Bear Forge website doesn't show attaching of the motor to the GIB so it makes me think that as long as it has a base plate I should be ok? Am I crazy for thinking this?

Thanks for your help,

David.
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That motor won't work. It needs to to have a 56C frame which will allow you to slide the face plate of the motor into a ring on the GIB and then mount the face with four bolts. The motor is not just mounted to the base plate.
 
Justice4all said:
Be aware that the called for gas piston on the GIB is not the right length unless he's updated the instructions. It's about twice as long as it should be and the extra length will cause the tracking wheel to not work properly. Be prepared for some serious tapping as the plates are either purposely or accidentally surfaced hardened.
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Yes, these are two issues I had to deal with during my GIB V2 build.
 
nomiakasu said:
Hello everyone,

I am planning on making a GIB 2.0, but like many new to the hobby, I am trying to keep the cost as low as possible.

One saving I am hoping to make is on the motor. I have seen several like this one: http://www.ebay.com.au/itm/171676599933?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT

For a fraction of the cost of any 56C Frame motor I can find. Would something like this be compatible at all? The Polar Bear Forge website doesn't show attaching of the motor to the GIB so it makes me think that as long as it has a base plate I should be ok? Am I crazy for thinking this?

Thanks for your help,

David.
Click to expand...

I have not built a GIB, or even seen one in the flesh, but it looks like the motor used is a foot-and-face mount with both mountings employed.

You have not given your location, though the linked motor is in Oz. Assuming the difficulty you are facing is getting hold of NEMA-sized motors, "all" you need to do is re-engineer the GIB to take a foot-and-face mount IEC Metric motor.

This may or may not be a problem for you and is probably all down to the reason why you want a GIB.

If you want a GIB because you do not have the skills/equipment/inclination to build a grinder from scratch and you do not have the cash to buy an off-the-shelf grinder, you are unlikely to find re-engineering it easy.

However, if you have the skills/equipment/inclination, but are out in the middle of nowhere and want a one-box delivery to save shipping costs (for example) it should present no problem.

Take a look at the following link.

http://ecatalog.weg.net/files/wegnet/WEG-weg-technical-poster-ustechposter-brochure-english.pdf

If you looked at the motor dimensions in the link and immediately thought "No problem. I can make that work", go for it.

If you looked at the link and thought "what the...?", it's probably not for you.

If you do go for it then, personally, I'd build for a 90-frame motor rather than the 80-frame you linked to. Reason being if you decide to go for a VFD in the future, a 3-phase, 2 HP/1.5 kW, 4-pole motor is usually built in a 90-frame and will be a direct swap, as will a 3HP/2.2 kW 2-pole motor, also in a 90-frame.

I think the 1.5 HP motor in an 80-frame is a "compact" motor; built into the next frame size down from "standard". In single phase, it makes little difference, but in 3-phase, "Compact" motors do not seem to be recommended for use with VFDs, which I presume is down to cooling at low speed.
 
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