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Stanko 1A983 Semi- Auto Lathe, Nisku, AB

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Maybe someone not in the "Hobby World" could explain the chuck on the left side of the gear box. I am assuming it is a chuck.

Extra grip on the material going through the spindle?
 
Susquatch said:
Ya, rear spider / cathead. Can't picture anything else, but REALLY OVERKILL!
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Actually not overkill at all.

We had a similar lathe and the two chucks were nice, when one needed to put centres in the ends of 10” diameter, 12’ long shafts. (Or anything else big that you could get in there.) Dial in the main chuck, then the rear, and get the stock running as true as you desired.

That was how we made replacement pivot shafts for D11 dozers, and other large shafts or pins.
 
Greywynd said:
Actually not overkill at all..... That was how we made replacement pivot shafts for D11 dozers, and other large shafts or pins.
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Oh, I wasn't saying that a rear spider is overkill. Just that a huge chuck like that is overkill.

I have 2 rear spiders for my lathe. Neither one of them involves a huge chuck. The rear spider doesn't have to provide driving torque. That can all be done from the front. All the rear needs to do is center the rear shaft and the rear shaft is almost never bigger than the spindle bore. Three or four bolts on a spindle ring will do.

I can imagine the odd time someone might want a big part held on the rear with a fragile integral shaft coming out through the front, but it wouldn't happen very often if ever in a hobby setting. Even so, I can't see needing a chuck that big on the rear. It's really only needed if you have to provide drive torque on a big part from the rear.
 
A 10" x 144 inch shaft will weigh well over a ton and could not be supported by a common cathead.. Nor could it offer the ability to correct runout. But, some of the stuff posted as for sale will never be a hobbyist dream tool. It's still interesting to see how the big guys do it.
 
Ironman said:
A 10" x 144 inch shaft will weigh well over a ton and could not be supported by a common cathead.. Nor could it offer the ability to correct runout. But, some of the stuff posted as for sale will never be a hobbyist dream tool. It's still interesting to see how the big guys do it.
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Fun stuff eh!

Are you saying that the spindle bore on that machine is 10 inches??

If so, then ya, I get it. But I'm guessing that spindle bore is maybe 3 or 4 inches and that can easily be accommodated by a 4 bolt spider.

Just for Shits N Giggles, I don't really see that machine as a "Big Guy's Lathe". I'm sure as heck one of the bigger guys. If what you meant is giant machines, then you can't really call that a hobbiests lathe. And there are lots of lathes waaaay bigger than that one.

Hairy guy singing...... I don't want her, you can have her, she's too big for me!
 
Susquatch said:
Fun stuff eh!

Are you saying that the spindle bore on that machine is 10 inches??

If so, then ya, I get it. But I'm guessing that spindle bore is maybe 3 or 4 inches and that can easily be accommodated by a 4 bolt spider.

Just for Shits N Giggles, I don't really see that machine as a "Big Guy's Lathe". I'm sure as heck one of the bigger guys. If what you meant is giant machines, then you can't really call that a hobbiests lathe. And there are lots of lathes waaaay bigger than that one.

Hairy guy singing...... I don't want her, you can have her, she's too big for me!
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First line of the ad, shows spindle bore of 12.6” diameter.

I’m mildly looking for a larger lathe, it also depends on timing because I currently don’t have the real estate. Specs I would be looking for would be 3-4” spindle bore, 22-26” swing, and 12’ between centres. I can make small stuff in it, can’t make large stuff in a small lathe though.
 
Suppose you have a big shaft in that machine to work on one end, and the shaft is 10" in diameter and 30 feet long. The first 6 feet is held in place by those two chucks through the head stock - and the 24' sticking out to the left? Now what? Another chuck on some sort of stand? A shaft like that might weigh 3700kg.
 
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