[AT] Old shop lathe motor-- motor questions for you "experts"

[Cecil Bearden]

I should have noticed that!!!  Should have known that 1450 Rpm is not a 
typical RPM..

Oh well, can't be right all the time....

Cecil in OKla
----- Original Message ----- 
From: "Mark Greer" <greerfam at raex.com>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Wednesday, January 18, 2006 9:42 PM
Subject: Re: [AT] Old shop lathe motor-- motor questions for you "experts"


>
> The motor is single phase but it is not a 2 speed. It will run 1450 rpm on
> 50 cycle power as found elsewhere in the world and 1760 rpm on 60 cycle
> power like we have here in the US. There are 2 speed motors such as the
> 5hp/10hp on my Warner & Swasey No. 3 which will run 860 rpm at 5hp and 
> 1720
> rpm at 10hp but they are usually 3 phase.
> Mark
>
> ----- Original Message ----- 
> From: "Cecil Bearden" <crbearden at copper.net>
> To: "Antique tractor email discussion group" 
> <at at lists.antique-tractor.com>
> Sent: Wednesday, January 18, 2006 7:30 PM
> Subject: Re: [AT] Old shop lathe motor-- motor questions for you "experts"
>
>
>> That motor is single phase, and 2 speed.  It has extra windings, that is
> why
>> it is so heavy.  You do not want to part with that motor because it will
>> give you twice as many speeds on your headstock as a single speed one
> will.
>> You can better match your speed when cutting. Really good when youa re
>> facing a large piece and need to slow down the speed on the outer cut to
>> keep down chatter.  I have a 3 hp one in my Colchester lathe.  It burned
> out
>> about 2 weeks after I got the lathe, and it cost over $300 to have it
>> rewound since it is 2 speed.  However, it needs the 2 speed due to the 
>> way
>> the lathe is set up....
>>
>> If  the tag states it will run on 115volt it is NOT a 3 phase unless it 
>> is
>> an oddball military surplus unit.... 2 get 115 3 phase you have to
>> transformer down to 115 with a 3 phase transformer.  3 phase is 230/460
>> USUALLY..  there are other configurations....
>>
>> Cecil in OKla
>>
>>
>> ----- Original Message ----- 
>> From: "John Wilkens" <jwilkens at eoni.com>
>> To: <at at lists.antique-tractor.com>
>> Sent: Wednesday, January 18, 2006 2:31 PM
>> Subject: [AT] Old shop lathe motor-- motor questions for you "experts"
>>
>>
>> >
>> > I have a neat old motor out of an older 13" South Bend lathe that I
> bought
>> > for parts.  I'm wondering about the electric motor in it...what's it
> good
>> > for? ...whay is it so big for the rated 1 HP?  Etc.   The motor must
> weigh
>> > close to 100 lbs.  The info on the motor tag is:  "General Electric
>> > Reversible Repulsion Induction motor.  224 frame, SCA type.  50/60
> cycles,
>> > 1450/1760 RPM at full load.   115 Volt (16/12.4 amps)/230 Volt (8/6.2
>> > amps).  Enclosure code F.  1 H.P."     It's a neat motor because it
>> > reverses with the switch off the lathe.  How come it's more than twice
> as
>> > big as a "modern" 1 HP motor?   Any comments welcome.  I'm just
>> > interested.     John W.
>> >
>> >                    In the wide-open spaces of NE Oregon
>> >
>> >
>> > _______________________________________________
>> > AT mailing list
>> > Remembering Our Friend Cecil Monson 11-4-2005
>> > http://www.antique-tractor.com/mailman/listinfo/at
>>
>> _______________________________________________
>> AT mailing list
>> Remembering Our Friend Cecil Monson 11-4-2005
>> http://www.antique-tractor.com/mailman/listinfo/at
>>
>>
>>
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