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Any ideas on finding a replacement electric motor?
Posted by: Racer X
Date: June 25, 2017 05:26PM
Piece of lapidary equipment. Basic looking motor though.

Doerr brand 110 A/C 1520 rpm, 1/15hp. 2.33 amps. part# S0416D1343

I could have it rebuilt, but would prefer a new one, and might buy a spare or two, to be honest.

mounts on the front face with 3 (probably)10x32 studs. Not fully fried. Will start spinning if you give it a manual spin.

Honestly, the piece of equipment is obsolete, but the newer version is about $1400. Worth the time and money. There are a bunch of these scattered around the country that need motors, so if I can come up with a decent solution, lots more can get put back into service.
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Re: Any ideas on finding a replacement electric motor?
Posted by: JoeH
Date: June 25, 2017 06:42PM
Unless they used a custom motor, just about any supplier of electrical motors should be able to provide a replacement. Just searching for 1/15 HP motor on Amazon shows quite a few possibles - [www.amazon.com].

In days past this is the kind of thing you could look locally by just using the yellow pages. Just about every large town had at least one supplier of electrical motors. They would either be in stock, or could be ordered after taking down a few specs.
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Re: Any ideas on finding a replacement electric motor?
Posted by: Filliam H. Muffman
Date: June 25, 2017 06:47PM
There are dozens of places to look but it would help if you knew how to accurately spec it out. Does the motor have a nameplate with a NEMA frame number?

The numbers don't really match up. 2.33 A at 110 V is 1/3 hp (256 W).

The first place I thought to look, McMaster-Carr, charges plumbing parts markup (5x what a licensed plumber would pay) on retail motors, a 1/3 hp, 1700 rpm motor is $354. Somewhat strangely, a 1/12 hp motor is $1,000. smiley-shocked003



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Re: Any ideas on finding a replacement electric motor?
Posted by: JoeH
Date: June 25, 2017 06:53PM
Also, grainger.com has a motor selector available that is useful if you do have the full nameplate specs to enter in. Prices are not as bad as McMaster, but still in the $100-150 range.
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Re: Any ideas on finding a replacement electric motor?
Posted by: Racer X
Date: June 25, 2017 06:56PM
Quote
JoeH
Unless they used a custom motor, just about any supplier of electrical motors should be able to provide a replacement. Just searching for 1/15 HP motor on Amazon shows quite a few possibles - [www.amazon.com].

In days past this is the kind of thing you could look locally by just using the yellow pages. Just about every large town had at least one supplier of electrical motors. They would either be in stock, or could be ordered after taking down a few specs.

That is the motor style. It really looks like a HVAC exhaust fan. I might just bring it in.

FYI, Doerr brand was a family business. "It began over 80 years ago with Emil Doerr at St. Louis Electrical Works, later renamed Baldor Electric, with Emil as co-founder. In 1939, Emil's son Lee and two of his brothers founded Doerr Electric. Finally, in 1972, Lee's sons formed LEESON Electric Corporation
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Re: Any ideas on finding a replacement electric motor?
Posted by: Racer X
Date: June 25, 2017 07:08PM
Quote
Filliam H. Muffman
There are dozens of places to look but it would help if you knew how to accurately spec it out. Does the motor have a nameplate with a NEMA frame number?

The numbers don't really match up. 2.33 A at 110 V is 1/3 hp (256 W).

The first place I thought to look, McMaster-Carr, charges plumbing parts markup (5x what a licensed plumber would pay) on retail motors, a 1/3 hp, 1700 rpm motor is $354. Somewhat strangely, a 1/12 hp motor is $1,000. smiley-shocked003

Those numbers ARE off the tag. The disparity between hp and current is probably because it is incredibly inefficient.

I have wholesale accounts with Grainger and McMaster Carr, but here in Seattle there are a number of motor rebuilders and independant warehouses.

Most new small motors like this use a sleeve bearing. This thing has a ball bearing sealed bearing in the snout. Probably why it lasted 40+ years.



Edited 1 time(s). Last edit at 06/25/2017 07:18PM by Racer X.
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Re: Any ideas on finding a replacement electric motor?
Posted by: JoeH
Date: June 25, 2017 08:27PM
The 2.33 A figure may also be a max or starting current figure as compared to the run current.
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Re: Any ideas on finding a replacement electric motor?
Posted by: tenders
Date: June 25, 2017 11:22PM
What do you have to do to get a wholesale McMaster account, and what does it get you?

Asking for a friend.
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Re: Any ideas on finding a replacement electric motor?
Posted by: Filliam H. Muffman
Date: June 27, 2017 11:14PM
Quote
tenders
What do you have to do to get a wholesale McMaster account, and what does it get you?

Asking for a friend.

Typically you need a current business license for a registered business (and likely pay taxes) that installs items they sell. Something like a general contractor that deals with electrical construction, or a mechanical/electrical/hvac repair service. You could contact them and ask...



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