I decided against a used one as I want something that will work out of the box, as well I would like it to be no more then 350 lb. With most of the removable parts taken off maybe 250 lb net.
My first project will be machining and cut
4130 aircraft tubing, the pieces are 1" dia. with .0625" wall that will be bored and have a finished wall thickness of .035" to receive ball bearings.
What experiences do some of the members of this group have regarding new Asian lathe? What would be the best price / value ratio in that class as mentioned above. I have done some research on the web but I still need input of users that can make informed comments.
5 or so dift suppliers carry it, incl HF, Grizz, Enco, etc etc.
for what can and in some cases, should be done to it to improve it (beefing up cross-slide, adding reverse and may be going variable-speed). It is an incredibly popular one and there are tons of resources on the Web.
If you go that route, $700 @ HF - 20% off, pick it up @ yer local store for instant gratification.
Or, if you innted to stay small in worksizes, go with The Lathe:
. Again, carried by all the usual suspects. It is even more popular than the 9x20 and again, lots of resources on the Web.
Both are perfectly useable outta box, right after removal of protective grease.
I have a 13x40 Enco, ca 1992, fairly pimped out by the previous owner. 70 rpm ( a little fast for tapping) to about 2200, 8 speeds. Love it. Not a Clausing Colchester (which shall be coming soon!!), but with its extras (snap handle collet closer, digital readout, Aloris tooling, camlock chucks), it's a pleasure to use.
I would highly recommend as many of those options as you can afford. A 5C collet system is fairly essential for small parts, and moreso if any kind of production is anticipated. Super-essential for thin-walled tubing. The snap handle is but one system (imo the best) of closing sed collets.
However, in these smaller lathes, you might not be able to fit 5C (which go from near-zero to 1.125 diam). Thus, to go the 5C route, you *might* have to bump up the size of the lathe a bit.
Ahm no 'spert, but w/ boring such thin walled tubing in a 3-jaw chuck, I suspect you will wind up w/ a kind of "lobed" bore, proly not so great for bearings. You could always machine a split-sleeve for your project (sort of mimicing a collet!), but collets make this, and oodles of other work, a slam-dunk.
Can't complain about the accuracy of the Enco, but then I'm not particular. :) It can hold .0005--but not over 40", of course.
If weight is an issue because of moving considerations, I think you can unbolt the gear head from the bed, and sans motor/carriage/tailstock, I think the bed and gear head will come in at about 250# (each). Comes w/ a pretty nice sheet metal stand/cabinet ditty. The 13x40, sans the goodies, I think is between $2 and 3K.
Yes, there are a variety of chuck-mounted collet systems. One is called a spin closer. Don't know if the Bison is this type. Bison is a good brand--Polish. Several cuts above the Chinese stuff. Priced inbetween Chinese and American, a bit closer in price to the Chinese. Chinese 5C collets: $6; Bison: $13; Royal: $27; Hardinge: $1K. :)
Btw, practicalmachinist.com has a forum for Schaublin lathes. I just helped a buddy pick up two from NJ, w/ snap handle collet closers and some kind of hydraulic tracer attachment, and one *big-assed* transformer. Excellent lathes, I'm told, quite on par w/ Hardinge. Looks like my buddy will be spending a lot of time on this forum!