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Tool Talk Discussion Forum

Quick change tool posts for lathes

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TimV

09-15-2007 17:05:39




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Just bought an old South Bend 9" workshop lathe, as my little Cummins 7x12 wasn't quite big enough for a few projects I've got going. Got a fair amount of tooling with the lathe, but the tool posts are the old lantern style. Planning on getting a quick-change setup, and wondering if anyone has any words of wisdom on the suitability of the piston-style versus the wedge-style tool posts. Enco sells the Phase II piston-style for $89, which is about half what the wedge-style run, and I'm wondering if they will work well enough for a lathe that won't be run every day. Feller on e-bay is selling wedge-style setups that he claims are interchangeable with the Aloris posts for $99, but unless I find someone that's tried them and likes them I'll probably steer clear. Any thoughts or experiences would be appreciated!

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mj

09-28-2007 08:32:43




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 Re: Quick change tool posts for lathes in reply to mud - never mind, 09-15-2007 17:05:39  

Davis In SC said: (quoted from post at 19:52:23 09/15/07) SB developed a plan for a concrete pedestal, that could be poured in place, to mount the lathes on. This rigidity was said to make the SB's almost as accurate as the Hardinge and EE Monarch lathes..


I'd like to have a copy of those plans! third party image

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chuckinnc

09-17-2007 09:59:17




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 Re: Quick change tool posts for lathes in reply to TimV, 09-15-2007 17:05:39  
Enco tool post work great for me, I have a Atlas/Craftsman 12x36 & 13x40 import. I keep up
my farm equipment 4 tractors, TBL & Dozer. My set
cost $120 from Enco, if i was in production work 24hr a day maybe it wold not be the best but for me and what i do its been perfect.



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Trucks1956

09-16-2007 15:35:04




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 Re: Quick change tool posts for lathes in reply to TimV, 09-15-2007 17:05:39  
Hey man, you need to do a search on Yahoo groups for South bend lathe group. It"s free to join , and they are really into the 9" lathe on there!! I"ve got a 16" and got a little info from there, but they are mostly into th 9"s on there.I"m very sure you can learn alot on there!!

Later and GOD bless



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Davis In SC

09-15-2007 18:52:23




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 Re: Quick change tool posts for lathes in reply to TimV, 09-15-2007 17:05:39  
I once had a Phase II wedge type post, and it was junk. I cursed it for years, finally broke down and paid 600 dollars for an Aloris.

Personally, I would just keep the lantern-style tools on that SB lathe. It does not really have the speed or rigidity to fully utilize carbide. No offense intended. They are not bad little lathes, as long as you remember that they are based on 100 year technology. I recently bought 2 SB 9's, that I intend to put to use someday.

Just an interesting sidenote: During WW2, the defense plants subbed out lots of small part to people that moonlighted with lathes at home. Since gas was scarce, they would come to pick up the parts. SB developed a plan for a concrete pedestal, that could be poured in place, to mount the lathes on. This rigidity was said to make the SB's almost as accurate as the Hardinge and EE Monarch lathes..

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Kim Goldin

09-25-2007 09:19:46




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 Monarch SB Lathe in reply to Davis In SC, 09-15-2007 18:52:23  
Sir, Saw your comments on the Monarch SB Lathe.

Do you know the spindle motor HP of this lathe.

Thanks, Kim



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Davis In SC

09-25-2007 09:38:33




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 Re: Monarch SB Lathe in reply to Kim Goldin, 09-25-2007 09:19:46  
Monarch and South Bend are two seperate brands of lathes. As a rule, Monarchs are larger, and more expensive lathes. I think my 9 inch SB lathes all have 1/2 hp motors.



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Butch(OH)

09-15-2007 18:49:49




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 Re: Quick change tool posts for lathes in reply to TimV, 09-15-2007 17:05:39  
Been awhile since I had to remember but I believe the advantage with the wedge lies in repeatability given that both are made with equal quality. For a CNC or DRO equipped lathe working at close tolarances a wedge type holder is worth the extra bucks. For what you are doing a piston type works great. I bought a D series piston Dorian for my big lathe and had an A series Phase 2 wedge on a bench lathe. The differance is like night and day. While there is no doubt a Phase 2 will hold tooling a Dorian is a joy to use.

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Joe(TX)

09-15-2007 18:26:38




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 Re: Quick change tool posts for lathes in reply to TimV, 09-15-2007 17:05:39  
The piston type is OK for the lathe you have and your use. It is words better than the lantern type. The wedge type locks tighter though.



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big jt

09-15-2007 17:21:02




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 Re: Quick change tool posts for lathes in reply to TimV, 09-15-2007 17:05:39  
I haven't tried the one on e-bay. I wasn't active there when I got the toolpost I have.

I purchased a piston style from MSC and have been happy with it. Mine is foriegn made and is the piston style. Has worked just fine for my purposes which is much similiar to what you are stating. Get one that matches up with Aloris as that is the standard in such things.

I will post a link to MSC, their website is dificult to navigate but their "BigBook" is fairly user freindly.

Good Luck

jt

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TimV

09-16-2007 06:04:14




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 Re: Quick change tool posts for lathes in reply to big jt, 09-15-2007 17:21:02  
Thanks to all, and further comments are welcome. JT: I'm betting that your MSC toolpost is the same one Enco offers, as Enco is a subsidiary of MSC and carries much of the same stuff. That's the way I'm leaning, particularly if you were satisfied with yours. I realize that this isn't a brand-new HAAS, but until I can get a brand-new HAAS for $300, I'm keeping this one. I've fought with enough of the lantern-style tool posts over the years to know that a QCTP is vastly preferable--even the El Cheapo that came with my Cummins mini-lathe is very handy, and I'll probably end up using a lot of the same tooling for both lathes, as I've got a pretty good assortment of stuff for the Cummins. We've got the Aloris wedge-style holders at work and like them, but I can't see spending more on the QCTP than I did on the lathe. Haven't had a chance to do a lot of testing on this lathe yet--I got it less than a week ago, and have spent the last few days reading up on them and undoing the "improvments" of previous owners. It seems to be in pretty decent shape for the age--hardly any wear on the ways or gibs, and the spindle's rock-solid with no play. TIR on a 1" chunk of aluminum was about 0.004", but that was with the 4-jaw chuck that came with it, so that could easily be Pilot Error--I don't have a good spot for the mag base on my dial indicator and I suspect I was getting a bit of movement while I was rotating the chuck. Scored a 6" 3-jaw chuck from E-bay, and I'm now looking for a steady rest.

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