It is very easy to reverse a three phase motor by switching to change phases.  But you can use a drum switch on a single phase motor. I have a couple of reversing single phase motors here on lathes ect.  Any motor that is internally reversable can be reversed by using the proper drum switch.
Bear

Live every day of your life like a three year old.  Get down in the dirt with it, roll in it and smile a lot.  Bear


--- Richard Fink Sr <nancydick@pennswoods.net> wrote:

From: Richard Fink Sr <nancydick@pennswoods.net>
Date: Fri, 30 Dec 2005 06:14:18 -0800
To: Antique tractor email discussion group <at@lists.antique-tractor.com>
Subject: Re: [AT] Northern Tool Sale - Left Hand drills

Carl why would it not be possible to put a motor on a drill press that 
would reverse. I have a wood shaper in my wood shop that had a 3/4 horse 
motor that would reverse. It died operator err pushed to hard left all the 
smoke out. Replaced with a 2 horse no reversing.Both of my drill presses 
just have a plate where the motor mounts. 
????????????????????????????????????????
R Fink
PA


>carl gogol wrote:
>
>>I am surprised that more list members have not extracted broken bolts 
>>with left twist drills.  I have successfully removed two broken off 
>>manifold bolts, one on each of my D-14s.  These are the two bolts that 
>>the vertical muffler brace attach to.  There is only one reason for these 
>>to break off, they have rusted over time and adhered to the 
>>manifold.  Actually, the first one was first heated with an oxy-acetylene 
>>torch.  It backed out with the left twist drill almost too easy.  Being 
>>fortified with success, I decided to try the other without 
>>heat.  Although I had to drill a second pass with a larger size, it too 
>>came without a lot of persuasion.  I only wish that I had a drill press 
>>that would reverse so as to drill a bit more securely for some other 
>>situations.  Maybe I'll get an old Bridgeport mill someday. YMMV.
>>Carl Gogol
>>Manlius, NY
>>AC 170D
>>(2) AC D-14, AC 914H
>>Simplicity 3112 & 7116
>>Kubota F-2400
>
>_______________________________________________
>AT mailing list
>Remembering Our Friend Cecil Monson 11-4-2005
>http://www.antique-tractor.com/mailman/listinfo/at



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