Dimensions for motor on KMG mounting plate

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Im trying to find out if there is enough room for my 182T motor to be mounted on the KMG mounting plate (SUBP) in the standard location. I will be mounting a KB vfd on the KMG vfd bracket and will also be getting the KMG tool tree. The width of the motor is slightly greater than 12". I know the predrilled motor mounting holes in the plate will not line up with my 182t frame motor mounting holes. I just need to know if there is enough room for my motor and I would then have the appropriate holes drilled or slots milled.

I have emailed this question to Rob and he did not feel comfortable saying if it would fit without having this 182T motor in front of him. So I am left to trying to get this info here. I'm hoping you guys can be helpful with this.

Thanks in advance.
 
12345678910 said:
Motor frame sizes are standardized

You can compare sizes here
http://www.electricmotorwarehouse.com/PDF/NEMA.pdf

Even if you have to drill 4 new holes, - no big deal ?
Click to expand...

No problem drilling holes. Rob made it sound like the 182t frame motor was huge and might not fit between the vfd bracket and the tool arm tree. So that is what I am asking, is there enough room for this motor. If there is room, I'll make it work. I hope there is since it would save a bunch of time. I know the 182 is bigger than the 56 motor but need to know if there is enough room.

Thanks for the help with the various other threads that you have chimed into.
 
Measure the motor width,length, and shaft height from the mounting plate - and give these dimensions to Rob. He should have a better answer with all the info. Clear photos with a reference ruler placed against the motor will help,too. You need top, side, front, and back shots.

From the charts, it looks like the 182T motor stands about an inch higher at the shaft, and is 2.5" bigger in diameter than a 56. The foot pattern is the smallest problem.
 
bladsmth said:
Measure the motor width,length, and shaft height from the mounting plate - and give these dimensions to Rob. He should have a better answer with all the info. Clear photos with a reference ruler placed against the motor will help,too. You need top, side, front, and back shots.

From the charts, it looks like the 182T motor stands about an inch higher at the shaft, and is 2.5" bigger in diameter than a 56. The foot pattern is the smallest problem.
Click to expand...

Looking at the nema chart I figured the following: (((p/2)-ab)+p=motor diameter with the junction box on the front. For the 56 frame motor, this is 8.95 and for the 182 frame this is 9.81. I am going to go out on a limb and say there must be 1" of extra room between the vfd bracket and tool tree arm.

I sent rob a nema type diagram of the motor when I initially asked him.

http://www.baldor.com/DMS/documents...905EBE10000002047AF7F%26compId%3d36LYG271.pdf

Thanks for the help.
 
Last edited:
While a NEMA chart is good, nothing replaces real world physical measurements.

I tell everyone who asks a custom ring mounting to be made for their stones ( which they don't have with them) that if they give me the measurements they think it is, I will make it only if they agree to pay for a new one if it is wrong. However, if I actually measure the stones, and there is a problem, I take care of it. I am sure Rob uses the same caveat.
 
Motor comes by end of next week, so I'll have exact measurements. I am comfortable that the Baldor drawings are accurate since whole systems are designed around dimensions of motors that need to be orderd. Since the plate needs to be shipped separately anyway, I'll likely get everything but the plate and then see how the measurements work out on a mocked up Beaumont mounting plate. Ill post the results here so that others can benefit from this information since 182t frame motors and quie common in 3 phase.
 
What keeps most others from using motors other than 56 frame is the shaft size.

If you're buying wheels from Beaumont, you need to stay with 5/8 or 3/4 shaft diameter.


The Baldor chart I posted lists 1.125" diameter shaft for that motor.
If it was a direct drive grinder like the GIB, you would need to make a custom drive wheel.

since the KMG has a jack-shaft and you're using a VFD, you only need a generic V belt pulley that fits that shaft, but you may not find it in your local hardware store.

a step pulley on the shaft size is either unavailable, or expensive


You can find generic pulleys from http://www.mcmaster.com/#v-belt-pulleys/=h0dv1l
 
12345678910 said:
What keeps most others from using motors other than 56 frame is the shaft size.

If you're buying wheels from Beaumont, you need to stay with 5/8 or 3/4 shaft diameter.


The Baldor chart I posted lists 1.125" diameter shaft for that motor.
If it was a direct drive grinder like the GIB, you would need to make a custom drive wheel.

since the KMG has a jack-shaft and you're using a VFD, you only need a generic V belt pulley that fits that shaft, but you may not find it in your local hardware store.

a step pulley on the shaft size is either unavailable, or expensive


You can find generic pulleys from http://www.mcmaster.com/#v-belt-pulleys/=h0dv1l
Click to expand...

Ill be doing exactly that, a pulley with a detachable bushing:

Pulley:
http://www.zorotools.com/g/00062151/k-G2993977/

Bushing:
http://www.zorotools.com/g/00062153/k-QT118/

Total cost will be $20.15. Can't beat that. If later I ever change motors i can reuse the pulley and get another $6 busing. While trying to get this 182T frame motor to work was initially a bit difficult, there are so many pulley options when going the vfd route that almost any motor should be able run the KMG.

Thanks again for chiming in. Threads with good detail are a great resource. I have read most of the KMG threads using the search function on this forum and have learned quite a bit.
 
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