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I need a little advice with my PM swing away. Please (Read 108 times)
 
Don R Davis
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Jet 12-21 lathe. I now have a Powermatic 3520 as of 9/12/20.
I need a little advice with my PM swing away. Please
Sep 15th, 2020 at 10:49am
 
This mourning I started adjusting the swing away on my PM 3520. My problem is vertical adjusting. The  SA "swing away" needs to come up about a 16th of an inch. Something else I don't understand is the clamp on the tailstock is all the way forward, toward the headstock.
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Ralph Fahringer
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Re: I need a little advice with my PM swing away. Please
Reply #1 - Sep 15th, 2020 at 12:06pm
 
You need another person to help you make those final adjustments.
One to hold it and the other to tighten.

That's how I finally got mine set right. I set the tailstock to hang over the end a bit so the SA will sit right up against it as someone else tightened the bolts.


Yeah.... the arm to tighten the tailstock is supposed to be at the back end of the tailstock.

Did you get this used or new and it came that way?
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Don R Davis
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Murfreesboro, Tennessee, USA
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Jet 12-21 lathe. I now have a Powermatic 3520 as of 9/12/20.
Re: I need a little advice with my PM swing away. Please
Reply #2 - Sep 15th, 2020 at 8:24pm
 
Ralph, I bought it used.
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Glenn Jacobs
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Re: I need a little advice with my PM swing away. Please
Reply #3 - Sep 16th, 2020 at 10:16am
 
Ralph, the CLAMP is in front, the arm is in back on a PM. Kiss

Glenn J.
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robo_hippy
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Re: I need a little advice with my PM swing away. Please
Reply #4 - Sep 16th, 2020 at 11:23am
 
I have never been able to get the tilt away on my Robust to line up perfectly. I did try loosening it up, then have the tailstock about 3/5 on the main bed, and 2/5 on the tilt away, and clamp that down tight, then tighten the screws on the tilting mechanism. Still didn't work. I am thinking that these are not designed for keeping the tailstock on when turning. The only one that is, is the Vic 240, which has the pivoting headstock, and maybe their other lathes. There is a machined metal bar that is horizontal on the swing part and a recess on the end of the bed. This lines it up perfectly every time. I really can't see any other way of doing it.

robo hippy
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Ralph Fahringer
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Re: I need a little advice with my PM swing away. Please
Reply #5 - Sep 16th, 2020 at 11:49am
 
Glenn Jacobs wrote on Sep 16th, 2020 at 10:16am:
Ralph, the CLAMP is in front, the arm is in back on a PM. Kiss

Glenn J.



Sorry, I merged the whole thing into one..figuring the arm is where the clamp is. Roll Eyes
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Don R Davis
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Re: I need a little advice with my PM swing away. Please
Reply #6 - Sep 17th, 2020 at 9:01pm
 
I finally got my swing away adjusted. I worked on it for quite a long time. I hope it doesn't get out of adjustment any time soon. Thanks for all of your comments.
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Glenn Jacobs
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Re: I need a little advice with my PM swing away. Please
Reply #7 - Sep 18th, 2020 at 9:52am
 
Ralph, no problem. I thought it strange that the Clamp is at the front of the tailstock rather than in the middle. But thinking it through a bit, it makes sense to have clamp on front end to keep head and tail in closer alignment.

Glenn J.
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Ed Weber
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Re: I need a little advice with my PM swing away. Please
Reply #8 - Sep 18th, 2020 at 10:03am
 
Glenn Jacobs wrote on Sep 18th, 2020 at 9:52am:
it makes sense to have clamp on front end to keep head and tail in closer alignment


If clamped towards the rear, the front end can lift under pressure
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