DC Motor Mount (for a disc grinder)

J

John Frankl

Joined
Oct 16, 2001
Messages
1,917
Hello All,

I recently purchased the following motor:

http://surpluscenter.com/item.asp?UID=2006022211043968&item=10-2213&catname=electric

I also have a Leeson Speedmaster controller with Forward, Reverse, and Brake. I am going to make a vertical disc sander out of this combo using one of Rob Frink's beveled discs.

The big question is how to mount the motor. I have thought of getting a base over here in Korea and welding it to the motor. I have had similar thoughts about getting a "proper" base from Leeson next time I am in the States. Finally, I have thought about using a couple of pieces of angle iron.

Any thoughts on all of this, including the best way to weld so as not to warp my motor housing, etc., would be very appreciated.

Thanks,

John
 
John, I have a vertical mount for a 56C motor:

56C-vert.jpg


Bolt this to the face or your motor, then hang the motor over the edge of your bench with the motor shaft pointing vertical. It is 1/2" aluminum plate.

DO NOT weld on the motor. The magnets are bonded to the inside of the motor case...and welding will damage the adhesive. I used to have a bunch of those Leeson mounts...but I've tossed them out as junk. And now I no longer sell DC motors. DANG! I knew I should have held on to one or two of them.

Does this help any...?
 
Welding supply shops carry cast aluminum brackets which are designed to strap to high pressure cylinders, and then be secured with a belt to a suitable vertical structural element to keep them from tipping over.

I have used these in the past as motor mounts. Weld or bolt the brackte to a base plate then sStrap the bracket to your motor with two stainless steel hose clamps ( yea, large ones!) this works suprisingly well. I used one on my first grinder for three yeats and it never worked loose.

Jim A.
 
Thanks Rob,

That would be perfect for my other grinder! I guess I was unclear, what I meant was the the disc itself would be vertical, with the motor mounted horizontally--just like the disc grinder package you sell.

I must say, however, that your mounting plate is perfect for anyone who wants a disc grinder that runs horizontally with the motor mounted vertically. I have one and it is very, very useful for flattening wood and small non-magnetic pieces that can be a bear to apply to a vertical disc. With this type of setup you have gravity working for you not against you and it makes things alot easier.

Thanks again,

John
 
John , a cheapo mount might be made from two pieces of angle iron, a wee bit of grinding, and two large hose clamps.....

Just a thought.
 
Rob's 'C' face mount could be cut below the bottom level of your motor and welded at 90 degrees to give you the mount you are looking for.

Just a thought........

-Mike-
 
Thanks for all the replies so far.

Rob and Mike, I was thinking just that. If I used the C Face Mount vertically to hold the motor horizontally, do you think I would only need to support the back end of the motor, or would I need to strap it down somehow?

Thanks,

John
 
rfrink said:
John, I have a vertical mount for a 56C motor:

56C-vert.jpg


Bolt this to the face or your motor, then hang the motor over the edge of your bench with the motor shaft pointing vertical. It is 1/2" aluminum plate.

DO NOT weld on the motor. The magnets are bonded to the inside of the motor case...and welding will damage the adhesive. I used to have a bunch of those Leeson mounts...but I've tossed them out as junk. And now I no longer sell DC motors. DANG! I knew I should have held on to one or two of them.

Does this help any...?
Click to expand...
That mount is bad to the bone.
I see talk of " angle iron" and the like.. NOOP.
You want to eliminate ALL vibration..
Nice mount there, fella.
 
John,

A 'C' face motor, mounted at the face, does not need to be supported at the back. The motor is designed to be supported only at/by the face.

-Mike-
 
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