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Machine Shop and Tool Talk

Atlas 12'' 36'' lathe


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  #1  
Old 10-13-2015, 08:50:57 PM
Jerry B Jerry B is offline
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Default Atlas 12'' 36'' lathe

I am going to ask a dum question on my lathe it has a quick change gear box , I want to do some treading the lever on the right I understand but the lever on the left side of the gear box what dose it do, I will be cutting 18 treads per inch
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Old 10-13-2015, 09:10:14 PM
Thaumaturge Thaumaturge is offline
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Default Re: Atlas 12'' 36'' lathe

You can download a manual here: http://www.lathes.co.uk/atlas/index.html
Doc

(As I recall the handle you refer to is feed direction. )
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Last edited by Thaumaturge; 10-13-2015 at 09:22:00 PM.
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Old 10-13-2015, 11:20:13 PM
ronm ronm is offline
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Default Re: Atlas 12'' 36'' lathe

You mean the ABCDE lever? The letter refers to the line the thread you want to cut is on. For 18 you need line B, 18 is in the second row of the right--hand lever. The sliding gear, which is in the gear train inside the cover, has to be "OUT".
The wizard is right, you need a manual...
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Old 10-14-2015, 05:47:23 AM
wmusta wmusta is offline
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Default Re: Atlas 12'' 36'' lathe

I would recommend putting the lathe into back gears. I assume you have the compound rest set around 29.5 degrees. Somebody can chime in on thread dial use. I'm sure its in the book. Good luck.
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Old 10-14-2015, 06:37:36 PM
Jerry B Jerry B is offline
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Default Re: Atlas 12'' 36'' lathe

I now I am dum but what do you mean the sliding gear in the cover needs to be out
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Old 10-14-2015, 08:51:10 PM
wmusta wmusta is offline
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Default Re: Atlas 12'' 36'' lathe

Flip open left side cover, starting on top is the forward reverse gearing. Below that are a large and small diameter gear right next to each other. Only one of the gears mesh with the quick change gear box gear. Its either the "IN" inside or "OUT" outside gear driving the gear box. Depending on the pitch requirement you may have to check or change the arrangement.
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Old 10-14-2015, 09:54:29 PM
JoeCB JoeCB is offline
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Default Re: Atlas 12'' 36'' lathe

jerry, I highly recommend the Atlas book "Manual of Lathe Operation", 250 pages, normally spiral bound with a black cover. it covers all lathe operations and is more comprehensive than the South Bend "how to run a lathe" book.
Find it on e-bay

Joe B
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Old 10-15-2015, 12:36:05 AM
dalmatiangirl61 dalmatiangirl61 is offline
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Default Re: Atlas 12'' 36'' lathe

Jerry, you need to find a book for this machine, or take a class at the local community college. At the very least find someone that can spend a day or 2 walking you through how the machine works, and how you should work it, even if you have to pay it will be cheaper than replacing broken parts.

Engaging back gear, open cover, pull the pin on the large gear, on front of machine find knob to engage back gear, pull knob out and push it back in. I can say how to do it, but without showing you, you probably won't get it
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Old 10-15-2015, 01:01:32 AM
dkamp dkamp is offline
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Default Re: Atlas 12'' 36'' lathe

And be advised, the Atlas gearboxes have absolutely NO tolerance for shifting while the machine is in ANY motion... bring it to an absolute positive stop, with power off, prior to shifting, especially leadscrew direction...
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Old 10-15-2015, 02:03:16 PM
Jim Tremble Jim Tremble is offline
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Default Re: Atlas 12'' 36'' lathe

Jerry

Contact these people for info or a manual for your lathe.

Phone: (800) 323-0972
Fax: (269) 342-7888
email: info@clausingsc.com

The gal on the phone is very helpful.

Jim
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Old 10-15-2015, 05:05:50 PM
schor schor is offline
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Default Re: Atlas 12'' 36'' lathe

There is a copy of south bend "how to rrun a lathe" on Vintagemachinery.org. It's not the same as your atlas but it would be a good read to get started.

http://vintagemachinery.org/pubs/1617/3789.pdf
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