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Craftsman 12X36 101.28990
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I've owned a Grizzly mini mill for several years and used it to make all manner of hobby pieces.
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I found myself in need of a lathe and I made the normal rookie mistake. I bought the first used lathe I found: a Atlas Clausing 6". It came with some tooling and a 3 jaw and NIB 4 jaw chuck. I was super excited to get it home and start turning. The fact that it only weighs 95 pounds and easily fit into the back of my SUV was a selling point.
Unfortunately, I discovered the spindle was bent. The drive pulley had such a wobble that it would have walked off the work bench if not bolted down. Caveat emptor, right? I could not even be mad at the seller, he was a really cool older gentleman with a '65 Dart, '70 Chevelle, and a '32 International in his shop.
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He had inherited the lathe and had never actually run it. When I told him about the bent spindle he immediately offered to take it back which was quite a stand-up thing to do. Then he went one step further.
It is set-up and ready to run so I can inspect it thoroughly before purchase. It has the QC gear box but that's about all I can discern from the picture he sent. See attached.
Last edited: Nov 14, H-M Platinum Supporter. Joined Dec 25, Messages 7, CBR please sign all posts , First, it's a 12x Atlas never made a longer machine. The In dollars. I've had one for 34 years and wouldn't trade it for anything unless for some reason I had to have something larger like a 20" or 24" swing machine which ain't going to happen.
First thing that you should probably do if you buy it is to replace the lantern style tool post with a steel AXA size Quick Change Tool Post. On the 6", I don't think I ever recall anyone reporting a bent spindle on an Atlas built Craftsman 6" lathe of which there were three models, not counting the But Sears sold 6" lathes that weren't made by Atlas and some of those have a history of bent spindles.
What model number is it? Robert D. Sorry, had that one mixed up.
It's an Atlas Clausing , serial number As for the Craftsman, all the info I have is the picture and the model number and he said it was a 12X48 but could easily be mistaken. I will provide better details when I go and inspect it. The price is attractive, I'm getting the "friend discount".
The spindle has a different part number from the one in the long-lived Atlas Craftsman But no one ever mentioned it being lighter that the earlier one. Could be the pulley itself.
If you were going to keep it, we could help you figure out where the problem is. But the larger machine is also a much better machine, even if your work could have all been run on the 6".
I wouldn't tell the guy who put you onto the 12x36 that he's wrong. Just let it lie.
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Yes, that's the type tool post I was referring to. If you look through that and other sites, you will see claims that the BXA next size up is also usable on a 12". But to use it you will have to have all of the tool holders near the bottom of their range and the tool post, holders and cutters all cost more. If you decide to get the And don't buy one that doesn't clearly state that the holders are interchangeable with Aloris, etc. But you will be stuck with having to only use their brand of tool holders.
The other holders you are unlikely to ever need more than one of. But if you have only one turning and facing holder and you need to change the cutter to a different one during a job, you will have to go through the setup procedure each time that you change. Which is definitely not Quick.
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When I put an indicator on the chuck it was three thousandths off. When I put an indicator on the drive pulley, it was 8 thousandths off vertically and 25 thousandths off horizontally.
By way of comparison, I put an indicator on my mini mill to get a base of reference. You can also see the gear in the headstock that is behind the drive pulley is definitely not running true. The two big gouges in the compound make it easy to contemplate how the spindle got bent. I did not spot those until after the sale I entertained trying to fix it. Being that the seller is such a good guy, I may offer to help him repair it to make it marketable but he is going to have to buy the parts and supply the beer.
Thank you for all the help and advice BTW.
Keep it coming. As a newbie to the lathe, I can use all the help I can get. Ron O. Ron, I'm not sure whether your. But if the latter,. Take the chuck off and indicate the register. This is what is supposed to center the chuck, not the threads. The register is the short part of un-threaded spindle nose between the threads and the shoulder or flange that the chuck tightens up against.
Typical here would be less than ,". The numbers that you got on the pulley don't actually mean much. It is if not impossible then very difficult to indicate a V-pulley accurately because there is really no good place to do it.
But my first assumption is that the different vertical and horizontal readings have to be caused by the measuring setup. The only practical way to accurately determine whether the spindle of a MK2 is bent or not is to remove it and check it somehow between centers on another lathe. If you do end up helping the owner to fix it, and need a new spindle, remember that Atlas made at least three different 6" spindles or four if you count the short-lived And none are interchangable.
One statement you can make about eBay sellers in general is that some know what they are selling and some haven't a clue.
Accurate measurements or not, the wobble in the drive pulley can be seen with the naked eye as can the out of round of the gear behind it. Also quite tangible is the amount of vibration this machine generates under power. I will indicate the register and report back.
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Odds are that the spindle is bent. If for no other reason than that it is unlikely that both the pulley and the back gear are off-center. I was just trying to point out that runout at a given axial location on a shaft or on something mounted on a shaft is a fixed amount regardless of where you measure it around the shaft.
OK, I measured the register. It barely moved the indicator so it's within a tenth or so. I pulled the pulley and found one side cracked at the bushing.
I think it was struck at some point in its life which is what knocked it so far out of true. It should probably be replaced but for now I managed to knock it to within 5 thousandths with a dead blow hammer.