motor for KMG grinder

W

work765

Joined
Aug 25, 2013
Messages
23
hi,
I just purchased a KMG grinder and need to find a decent used motor to put in to it. I am looking for a 1.5hp 3 phase. I only have 110 available where I live right now. My question is, when I'm on ebay, I dont completely understand all the stats of the motors, and don't want to purcahse the wrong one. I spoke with someone at KMG and he told me where the RPM's should be, but i'm wondering about voltage and frame type.

for example will this one work? http://www.ebay.com/itm/Baldor-1-5-H...item20db2082c3

it doesn't mention anything about a Nema 56 frame, which is what i believe fits into the base of the KMG grinder. Also does the voltage indicate weather or not it can be wired to 110 and 220?

thanks for any help. Sorry this is confusing.. I know absolutely zero about electric motors.
 
work765 shoot me an email and I'll give you my source. Its a bit more expensive than ebay but they are new, warranted and free shipping. wood and steel . biz @ gmail . com
 
thanks for the resource. I really want to spend under 120 on a motor. Thats why im looking for a used one. I figure these motors are built to run years and years all day. I'm pretty much going to be just using it as a hobbyist. Can anyone explain the what type of volts I am looking for and anything that I need to look out for regarding the base?

thanks
 
Work, do you have access to 110 or 240? Are you going to be using a VFD or "pulleys?" What size motor are looking for? What RPMs do you have in mind?
 
Faron,

I will be using 110 standard outlet here in the US. My plan is to find a cheap VFD rated at 2HP to regulate the 1.5hp motor(i read that should work). I spoke with someone at KMG and he said the RPMs should be around 3500-4500.. So i figure once i get the motor I can buy the correct pulley to make this my medium speed. and the VFD will allow me to go up and down from this middle point. and the frame has to be NEMA 56 I believe to sit on the base plate..
 
work765 said:
hi,
I just purchased a KMG grinder and need to find a decent used motor to put in to it. I am looking for a 1.5hp 3 phase. I only have 110 available where I live right now.


I'm wondering about voltage and frame type.

for example will this one work? http://www.ebay.com/itm/Baldor-1-5-H...item20db2082c3

it doesn't mention anything about a Nema 56 frame, which is what i believe fits into the base of the KMG grinder. Also does the voltage indicate weather or not it can be wired to 110 and 220?

thanks for any help. Sorry this is confusing.. I know absolutely zero about electric motors.
Click to expand...

That link is broken

If you want a 1.5hp three phase motor, but you only have 110v ac single phase, then you must use a KBAC27D VFD converter
This will give you variable speed
I have seen others mention that other vfd's will work with 110.
I haven't found them.


A NEMA 56 frame will dictate the shaft size
5/8"
This means you can use most of the drive wheels for sale from KMG, USA knifemaker and others.

On the KMG you will want the motor to have a foot base, not all do - verify before you buy.

Don't worry about the spacing of the foot holes to fit the baseplate, just drill holes if you need to.



The VFD will output 3 phase 220 volts AC, make sure the motor does that.
There is no 110v, 3 phase
There are other higher voltages in 3 phase, some motors are multi voltage, some not.



The mention of pjt is good
http://www.ptjindustrial.com/Leeson_110917_p/110917.htm
http://www.ptjindustrial.com/Leeson_110918_p/110918.htm

hard to find a better deal on ebay





The specs and price on this look good, but becareful see the holes in the photo it's not totally enclosed
http://www.ebay.ca/itm/Magnetek-Cen...005?pt=LH_DefaultDomain_0&hash=item4acc1cafe5
http://i.ebayimg.com/00/s/MTIwMFgxNjAw/z/d2AAAOxyTjNSh83J/$_57.JPG
 
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work765 said:
12345678910,


Thank you very much!! some light at the end of the tunnel.. :D
Click to expand...


Work765, so you are aware, the VFD that The Count mentioned is about $400, not including the motor. The VFD is the drive unit that controls the speed of the motor and is required to run the 3phase motor you plan to buy, unless you plan to pick up a phase converter. I have the VFD (absolutely love it), and like most people that have one would highly recommend it, but with a 1.5hp motor the set up will run you about $600... Not the $120 you were planning to drop
 
I started with a 1 hp regular motor. Was not tefc. Ran it a year before i upgraded to the three phase/vfd. 110 is only good up to about 1.5 hp. Get a 110 motor and run it a while with pulleys then upgrade. Only way to stay anywhere close to your budget.
 
Bob Katilus said:
Work765, so you are aware, the VFD that The Count mentioned is about $400, not including the motor. The VFD is the drive unit that controls the speed of the motor and is required to run the 3phase motor you plan to buy, unless you plan to pick up a phase converter. I have the VFD (absolutely love it), and like most people that have one would highly recommend it, but with a 1.5hp motor the set up will run you about $600... Not the $120 you were planning to drop
Click to expand...

Bob's right, maybe I didnt stress that engouh.
http://www.electricmotorwholesale.com/9520-KBAC-27D/


You could get a motor for $120 if you're not in a hurry, but but that's not including a controller.

Your restriction to 110 will mean you have to use a more expensive but good controller, I've searched for a hundred dollard vfd that takes 110 input and haven't found it.

Maybe there is one you can ebay direct from China, but you're on your own hooking it up, programming it or with warranty service.



Starting with pulleys and changing later means you have that expense of the motor again later, that may take you half way there on VS, it's up to you to decide what you want
 
work765 said:
thanks for the resource. I really want to spend under 120 on a motor. Thats why im looking for a used one. I figure these motors are built to run years and years all day. I'm pretty much going to be just using it as a hobbyist. Can anyone explain the what type of volts I am looking for and anything that I need to look out for regarding the base?

thanks
Click to expand...

These two things don't usually match each other. Not that spending $120 on something is bad, just realize that it isn't high end equipment and may not out live you
 
ok.. thanks for the clarification. My plans were to buy a used Motor.. around 120 and then find a used or inexpensive VFD.. I had no idea; for it to be able to run 110 it would have to be an expensive one. I've seen some on ebay for pretty cheap, but I had no real idea what i was looking at. I just spent a lot of money on the grinder and my idea was to find a used inexpensive motor to just get grinding on. I have been grinding at bit at a friends house and finally decided i needed one of my own. But its a huge investment. and thats why i went Grinder without motor option. Maybe i'll just do a super cheap 110 with pulleys to start off with, and then a year down the road, get the vfd and a new quality motor... Sounds good right? three speeds is better than one for sure..
 
work765 said:
Maybe i'll just do a super cheap 110 with pulleys to start off with, and then a year down the road, get the vfd and a new quality motor... Sounds good right? three speeds is better than one for sure..
Click to expand...

That's what I did.
 
work765 said:
ok.. thanks for the clarification. My plans were to buy a used Motor.. around 120 and then find a used or inexpensive VFD.. I had no idea; for it to be able to run 110 it would have to be an expensive one. I've seen some on ebay for pretty cheap, but I had no real idea what i was looking at. I just spent a lot of money on the grinder and my idea was to find a used inexpensive motor to just get grinding on. I have been grinding at bit at a friends house and finally decided i needed one of my own. But its a huge investment. and thats why i went Grinder without motor option. Maybe i'll just do a super cheap 110 with pulleys to start off with, and then a year down the road, get the vfd and a new quality motor... Sounds good right? three speeds is better than one for sure..
Click to expand...


There you go.. Decision made, Most of us had to start where you are. Get the pulleys and start playing around with it. It does suck when you come to the conclusion there is no real "cheap" way to get a Quality VFD unless a good friend happens to give you one. Good luck
 
work765 said:
ok.. thanks for the clarification. My plans were to buy a used Motor.. around 120 and then find a used or inexpensive VFD.. I had no idea; for it to be able to run 110 it would have to be an expensive one. I've seen some on ebay for pretty cheap, but I had no real idea what i was looking at. I just spent a lot of money on the grinder and my idea was to find a used inexpensive motor to just get grinding on. I have been grinding at bit at a friends house and finally decided i needed one of my own. But its a huge investment. and thats why i went Grinder without motor option. Maybe i'll just do a super cheap 110 with pulleys to start off with, and then a year down the road, get the vfd and a new quality motor... Sounds good right? three speeds is better than one for sure..
Click to expand...


Sounds simple, Let show you how I look at it and muddy that decision for you.

You need a motor, whether you do a single phase or three phase one now, basically the same price.


So you are looking at the price difference between step pulleys and the controller

If you go super cheap, the pulleys are about 60 for the pair and will never balance very well. You will go to the better step pulleys later.
If you go with the good Maska pulleys KMG sells - That's already half the price of the KBAC27D controller without having the controller


If you upgrade at a later date, the upgrade costs more because you also need a motor.


So in my mind, the difference between pulleys and a controller is about $150 or 175
If you can scratch up some Christmas money, overtime, or sell a few knives you don't love as much anymore - I'd do the controller.



Or more options

If we change the parameters from what you asked for in your first post, you can use a cheap controller and a cheap motor

Go with a 1 HP motor and controller like a TECO FM 50
http://www.tecowestinghouse.com/products/Drives/fm50.html
http://www.factorymation.com/Products/FM50_115V/FM50-101-C.html


Go NEMA 4 - it's sealed and gives you a twisty knob

Staying at the 1 HP limit means you can use it with a 110v input.
 
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The Count... you're messing with my head.. now, im confused again.. ughhh.. cause my buddie has a 1hp grinder and it works fine..
 
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