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Old 05-16-2019, 12:46 PM
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Wolfram Wolfram is offline
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Default Electric Motor Types and Overall Lengths?

Hey, all,

I need to replace the 1.5 hp motor on my Powermatic 64A contractor's table saw and I'm thinking of using a 2 hp motor. OEM motor is Type 56.

I found a Type 56 single phase 2 hp 3450 rpm TEFC motor but one thing that's critical is the overall length of the motor, because when you tilt the motor/trunnion to 45° the back of the motor (opposite shaft) gets close to interfering with passage of the wood over the table.

Can I safely assume that the overall length of one Type 56 motor will be the same as another Type 56 motor?

I've looked at diagrams showing all the dimensions for the various NEMA motor types, and verified that mine is a Type 56, but the one dimension that's missing from all the tables of dimensions I've found is "dimension C" below. I don't know why they even label it "C," since none of the tables show "C."

Can anyone advise me on this? I asked the vendor what the OAL is of the motor they're selling, but I guess they don't know how to use a rule...

Thanks for any help.
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Last edited by Wolfram; 05-16-2019 at 12:53 PM.
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Old 05-16-2019, 03:23 PM
BukitCase BukitCase is offline
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Randall, looks like you're gonna hafta get somebody off their ass and measure - from here

http://wiki.vintagemachinery.org/Mot...me%20Size.ashx

"Manufacturers use prefixes to specify variations within a frame size, such as the overall motor length. There is no standardization of prefixes and you must check with the manufacturer to learn the meaning of a prefix."

And from here

http://rockymountainbaldor.com/wp-co...frame-size.pdf

"Contact your local Baldor office for "C" dimensions"

Guess the "C" stands for "Classified" ...Steve
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Old 05-16-2019, 04:41 PM
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TEK TEK is offline
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Quote:
Originally Posted by BukitCase View Post

Guess the "C" stands for "Classified" ...Steve

Or crash, or contact, or crunch, or crinkle, or cash....any or all that may apply.....lol
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Old 05-16-2019, 04:48 PM
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Wolfram Wolfram is offline
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LOL, thanks guys.
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Old 05-20-2019, 06:57 AM
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NEMA (frame size #) C usually denotes a non NEMA standard shaft length or mounting dimension.

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Old 05-20-2019, 08:01 AM
Norcal Norcal is offline
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A NEMA 56C frame motor is C frame mounting, used for pumps and other directly mounted equipment.

A 2 HP motor on a contractors saw is a bit much, 1.5 HP is what they were made for, better to upgrade to a cabinet type saw, 3 HP will drop in a Unisaw with no problems.
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Old 05-23-2019, 10:51 AM
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Here is a list from Engineering Power Tools:
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Old 05-24-2019, 07:37 AM
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Quote:
Originally Posted by Norcal View Post
A NEMA 56C frame motor is C frame mounting, used for pumps and other directly mounted equipment.

You're right. I crossed wires in my head, and was thinking of when "Y" is in the framesize number. Sorry for my boo boo. I've been away from my motor stuff too long (can't believe I haven't worked there in almost 20 years)...



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