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Lubrication (Read 562 times)
 
Len Layman
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Grand Cayman, Cayman Islands
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PM 3520b
Jet 1220
Lubrication
Mar 10th, 2018 at 9:21am
 
I have to replace the tailstock quill on my PM 3520b.  I have taken out and cleaned the Lead screw.  What do you recommend I lubricate it with when putting it back together?   I have 3 in 1 oil and also red grease.  Which would be better or is there a better option?

Thanks
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Jeff Vanden Boogart
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Rural Green Bay, Wisconsin, USA
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PM 3520
Re: Lubrication
Reply #1 - Mar 10th, 2018 at 10:14am
 
I use grease in low speed but high pressure applications like the screw, and a little oil on the O.D. of the quill.
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Ed Weber
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Re: Lubrication
Reply #2 - Mar 10th, 2018 at 11:17am
 
Jeff Vanden Boogart wrote on Mar 10th, 2018 at 10:14am:
I use grease in low speed but high pressure applications like the screw, and a little oil on the O.D. of the quill.


+1
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Ron Sardo
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Re: Lubrication
Reply #3 - Mar 11th, 2018 at 6:09pm
 
Graphite.

Any type of oil attracts and retains wood dust then becomes an abrasive.
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Ed Weber
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Wilton, California, USA
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Re: Lubrication
Reply #4 - Mar 11th, 2018 at 6:55pm
 
Ron Sardo wrote on Mar 11th, 2018 at 6:09pm:
Any type of oil attracts and retains wood dust then becomes an abrasive.


Very true, I was going by what he said he had on hand.
I have never had issues greasing the internal screw. I usually use T-9 on the exposed portion of the quill.
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Len Layman
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Grand Cayman, Cayman Islands
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PM 3520b
Jet 1220
Re: Lubrication
Reply #5 - Mar 13th, 2018 at 3:38pm
 
I took Jeff's advice and lightly greased the screw, and a real light wipe down with oil on the O.D.  Installed the new quill, and it is as good as new now.

Thanks for the input, folks.
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« Last Edit: Mar 13th, 2018 at 3:39pm by Len Layman »  

Len

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Glenn Jacobs
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Re: Lubrication
Reply #6 - Mar 14th, 2018 at 12:01pm
 
Len, what happened to cause the need to replace quill?

Glenn J.
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Len Layman
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Grand Cayman, Cayman Islands
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PM 3520b
Jet 1220
Re: Lubrication
Reply #7 - Mar 14th, 2018 at 12:14pm
 
Glen,  I am not sure.  It just got tough to turn.  I googled it, and after trying to clean it up and trying other suggestions I purchased a new one, put it in, and all is now well.  There is some speculation that the torque from drilling with it can cause the quill to bend.  I find it hard to believe because that is one massive hunk of metal.  Another theory is that the slot for the key that keeps it from spinning get worn on the edges.  I tried cleaning it up with a file with no luck.

What caused it I still do not know, but the good news is it is now solved.  I just don't know what to avoid doing. Cheesy  I have had the lathe about four years.
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Len

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robert baccus
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Re: Lubrication
Reply #8 - Mar 15th, 2018 at 12:41am
 
The advice about the torque and key is correct--been there and seen it several times.  I finally putin a new screw and shaped it into a "brick" shape so that it wouldn't dig into the quill, cleaned up the quill with a file and corrected it.  I do a lot of drilling with a foster bit as did my friends. Wink
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Jeff Vanden Boogart
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Rural Green Bay, Wisconsin, USA
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PM 3520
Re: Lubrication
Reply #9 - Mar 15th, 2018 at 9:17pm
 
I modified the stock set-up also, which IMHO, is merely simple and cheap to make for the manufacturer, but has no redeeming value to the user.  Not too hard to do and with an actual KEY riding in the KEYWAY, I doubt it's gonna wear out for a looong time.
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Ed Weber
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Wilton, California, USA
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Re: Lubrication
Reply #10 - Mar 16th, 2018 at 8:36am
 
Jeff Vanden Boogart wrote on Mar 15th, 2018 at 9:17pm:
an actual KEY riding in the KEYWAY


I don't know where you come up with these crazy ideas   Roll Eyes Wink
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