<font face="Verdana, Arial" size="2">Originally posted by halfnut:
I'll use this for expressing my Idea for a dream machine, one I could get a lot of use out of.
Spindle, D-1 series definately, spindle taper, #5 morse. Hole thru spindle doesn't have to be that big for my dream, handy lathe.
Swing, about 10", 6" tru adjust 3 jaw, 8" 4jaw, 5-C collet attachment with lever closer. Bed lenth, about 40" c to c, just so you can slide tailstock back out of the way further.
Bed needs to be nice and wide, about 12" for 10 swing, carriage also needs to be long, 14" should do it. Also the bed needs to be made so that the wings of the carriage will travel past the spindle nose, like they used to do it. 2 vees and 2 flats is good enough if the are of good size and of good material, high nickle iron.
With a 8" chuck I think the max. safe speed would be 3,000 rpm. A good 5hp motor would be enough, but the way they rate things today you would probably need a 7 1/2hp.
English, metric, diametrical, and modulus threading capabilities. A reversable leadscrew like a Hardinge or Hendey so you don't have to reverse spindle when cutting metrics, diametricals or moduluses.
A good long taper attachment of the compensating variety, 10 or 12 inches of travel. I like the one on my old Bradford about as well as any I have used, patent has probably ran out by now, it's a good design, the hendey design is good but I don't like the leadscrew handle going in and out.
I like a DRO, but it is hard to mount so that it isn't in the way. I still like a dial also, nice and big is better, satin chrome is great. At least a DRO for the carriage travel. Throw in a micrometer carriage stop also. But then again a travel dial set up is really nice, I can stop the carriage to a few thous with a travel dial, looking at those numbers on a DRO is not the same as watching a dial move. Analog is good. This is a dream machine, hang all of them on, what the heck.
Compounds, I don't cut that many long tapers with compound. With the bed built so that carriage wings go past spindle nose you don't need long compound.
Needs to be a clutch machine, forward reverse arrangement like a big Clausing. Nice for backing out taps.
Tailstock needs to be substantial, and it needs to be long so that when you are tapping and reaming with it it will slide easy without rocking. 200 thous per rev of handle, with a dial. I like this feature on new machines, you get used to this when running a bridgeport, 5 turns per inch, second nature after while. And about 5 1/2 inches of travel with a #4 morse taper, drive tang. Single lever clamping.
Foot brake with a nuetral return.
Scraped ways. Nice pretty frosting.
A feed gear diconnector and index marks for cutting multiple lead threads.
A cast iron headstock top that a mag base will stick to, dadburn aluminum things anyway. Tray top headstock and tailstock is good.
Flat tops on carriage wings for indicator use.
Separate cross slide and carriage feed clutches.
Dark green with gold pistriping would look nice.
I probrobably have left out something.
Price, who knows, this is a dream, right.
Good info, thanks this is what I want to hear