I don't think I posted that a H10 couldn't do a good job, it just ain't the quality of my 10EE. I do my chambering on my Clausing 6913. Somebody said they couldn't get their lathe slow enough for chamber reaming? How slow do you think you need to go. I have a Grizzly 0709 lathe. It is heavy and works very well, but is awkward for me to use.
I dunno. Slow.
The HLVH pattern machine doesn’t have back gears and is difficult to run from VFD’s so most guys don’t. The low range on it tops out pretty high. I want to say a nominal 174 rpm for some reason. I’ll glance at it next time I’m in the shop. I was running it today finishing some parts a bit over an inch diameter, little discs, sorta, T303 stainless, that get a cosmetic face cut on one side. On that machine, spindle speed is completely separate from feeds speed (unless you are going through the threading gearbox) so you can run a 2500 rpm spindle, for example, but with a microscopically slow feed, and get an almost mirror finish. I wasn’t taking it that far, but that was the idea.
You’d think that would be a bit high for threading towards a shoulder but the HLVH threading setup is just slicker’n chit.
I do my chambering- which to be clear is only a few so far- on my Webb (Mori Seiki) which is on a VFD, and has low gears too…. so I can indulge my desire for slowness. In fact the time I crashed it badly enough to damage parts, it was due to excessive slowness, which is a different story and kinda funny in an $800 splined shaft and 3-day teardown kinda way.
