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Tool Talk Discussion Forum

Clausing 12 x 36 lathe

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JC

06-11-2004 10:50:38




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I have been offered a lathe on trade for some tractor parts. I am thinking that it would come in handy in my shop for any number of things. I know very little about them and wondered if someone more knowledgable might give me some pointers on what to look for when I look at it this evening. Unfortunately, he has just a few tools to go with it. Don't know how expensive these are to pick or up what I might need. Thanks in advance.

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Davis In SC

06-13-2004 08:11:31




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 Re: Clausing 12 x 36 lathe in reply to JC, 06-11-2004 10:50:38  
JC, Do a search for Lathes There is a great site in UK that has pics,specs, & info on about every lathe ever built.... Regards, Davis



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Jack

06-11-2004 20:56:34




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 Re: Clausing 12 x 36 lathe in reply to JC, 06-11-2004 10:50:38  
Clean the oil/grease/gunk off the ways and check for wobble. In many cases the gibs can be adjusted to tighten it up, but not always. Also, as a previous writer suggested, check the lead screws for wear/slop. Make sure to clean the oil/grease off first because that can hide wear. Look to see if anything is mashed from hammering-a sign that it hasn't received the best of care.



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Davis In SC

06-11-2004 18:37:15




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 Re: Clausing 12 x 36 lathe in reply to JC, 06-11-2004 10:50:38  
One thing to check on the 12-inch Clausing is the variable-speed mechanism. If it is like the one we had, it has a handle that turns to set speed of spindle. It activates a plunger to force oil into a cylinder that moves the sheaves on a variable speed pulley. We had a lot of trouble with this system, & it was expensive to fix. Regards, Davis



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JC

06-11-2004 20:24:50




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 Re: Re: Clausing 12 x 36 lathe in reply to Davis In SC, 06-11-2004 18:37:15  
Turns out that this is a model 5300 Atlas by Clausing. It has a clutch lever and the clutch appears to work. Lathe is not wired currently as it is 220 vac 3 phase. He is going to put a 220 volt motor on it to try it out as he has never used it. The ways are tight and appear to be in good shape. All the gears I could look at looked to be in good shape as well. It has a quick change tool holder set-up on it. Also the headstock is such that you can pass stock through it up to a certain diameter. WOnder if this one has the troublesome feature you are referring to? He wants $1000 dollars for it. Thanks

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Davis In SC

06-12-2004 11:08:39




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 Re: Re: Re: Clausing 12 x 36 lathe in reply to JC, 06-11-2004 20:24:50  
JC, How do you change speeds on this lathe ??? I think it uses a belt that you change to different pulleys, plus a "back gear" function. If I am correct on this, it does not have the troublesome hydraulic pulleys that our Clausing did. Regards, Davis



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JC

06-12-2004 15:08:06




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 Re: Re: Re: Re: Clausing 12 x 36 lathe in reply to Davis In SC, 06-12-2004 11:08:39  
I am going back tomorrow to see it in operation. He spent today installing a 1 hp 110 vac motor and says everything works with the exception of the reversing switch. I am not sure that is much of a problem. As far as I understand, there is a lever in front that can be placed in one of eight or so slots to effect spindle speed. There are also a couple of pulleys in front of the motor that can be utilized. In addition, he explained there is a planetary that can be engaged that slows it even more. Is this sounding like a familiar lathe yet?

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Davis In SC

06-12-2004 16:53:29




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 Re: Re: Re: Re: Re: Clausing 12 x 36 lathe in reply to JC, 06-12-2004 15:08:06  
JC, sounds like this one does not have the troublesome system ours had. Ours was a regular Clausing. The planetary device you refered to is called the "Back Gear" that I had referred to. Regards, Davis



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TimV

06-11-2004 11:47:39




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 Re: Clausing 12 x 36 lathe in reply to JC, 06-11-2004 10:50:38  
JC: If he's got the basics, and if the lathe has a common taper or thread setup, then you can pick up tooling fairly reasonably. Common collet setups are R8 and 5C. Common tapers are most any of Morse or Jacobs tapers. Desireable tooling would include a steady rest, follow rest, collets, tool post (quick-change preferred), tool holders, (right-hand, left-hand, straight and parting) as well as a chuck setup for the "dead end" of the lathe. As far as tool bits, most machinists grind their own, but you can pick up ready-made carbide bits for a couple of bucks each.

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Don-Wi

06-13-2004 08:45:39




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 Re: Re: Clausing 12 x 36 lathe in reply to TimV, 06-11-2004 11:47:39  
I work in a machine shop and have yet to see a lathe with R8 and 5C tapers, those are for small mills. Lathes have the Morse taper. I wouldn't recomend buying a collet set for a lathe.
Donovan from Wisconsin



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TimV

06-13-2004 21:43:21




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 Re: Re: Re: Clausing 12 x 36 lathe in reply to Don-Wi, 06-13-2004 08:45:39  
Don: The machine shop where I work has 5C collet chucks on every lathe (4) and they are used every day. A collet set for a lathe, particularly a small one, is one of the best investments you can make, especially if you're doing repetitive setups of the same size stock, as we often are. We've also got 3 and 4 jaw chucks, of course, as well as various other ways of holding stock, but the collet chucks are what is on the lathe most of the time.

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Don-Wi

06-14-2004 20:11:43




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 Re: Re: Re: Re: Clausing 12 x 36 lathe in reply to TimV, 06-13-2004 21:43:21  
I guess you learn something new every day. The shop I work at doesn't do much turning of small stuff, or even shafts. We have 2 older clausings (70's I think), a leblonde that's about 70 years old, and one big one that dates back to 1903. We work mostly with sprockets, so we have different sets of soft-jaws that we cut out to size on a 3-jaw. We have 1 4-jaw we use between the 2 clausings, but almost everything on our manual lathes are sprockets & gears.
Donovan from Wisconsin

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TimV

06-16-2004 08:29:30




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 Re: Re: Re: Re: Re: Clausing 12 x 36 lathe in reply to Don-Wi, 06-14-2004 20:11:43  
Yup--someone famous once said that if you didn't learn something new each day, then you wasted the day. Our machine shop mainly supports our "real" work, which is making gaskets. As such, they make many of the dies for making the gaskets. When a gasket has a large number of holes that are the same size, the collet setup really shines. You may have to chuck up, turn down and cut off a couple hundred pieces of stock roughly 2" long to make the punches. With a collet chuck, you can stick a 3' length of stock throught the headstock, turn it down, cut it off, and repeat the operation quickly with minimal setup and excellent repeatability.

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Davis In SC

06-13-2004 09:30:06




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 Re: Re: Re: Clausing 12 x 36 lathe in reply to Don-Wi, 06-13-2004 08:45:39  
R-8 collets are used to hold milling cutters in a milling machine, such as a Bridgeport. C- seies collets, such as a 5-C are used to hold stock or workpiece in a lathe. I have a full set of 5-C collets for my Hardinge toolroom lathe. They work great, work is held rigid since there is no overhang like there is with a chuck. Also there is very little runout... If you buy collets, brands like Hardinge, Buck, or Royal are much better than the China-made ones....

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Art in NY

06-11-2004 11:45:01




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 Re: Clausing 12 x 36 lathe in reply to JC, 06-11-2004 10:50:38  
Go to www.practicalmachinist.com and ask this question.



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Giles

06-11-2004 11:28:46




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 Re: Clausing 12 x 36 lathe in reply to JC, 06-11-2004 10:50:38  
I would look for excessice slack in "lead threads". These are the threads that move the cutting tool in and out. This can be checked by turning the dial in until the compound moves and then reverse the direction. The more slack the more used it has had. Also check for "chuck" bearing wear. Check for wear on the "ways". These are the, somewhat, dove tail shaped tracks that the various components, such as the compound, slide on. Hope this Helps.

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