@@ras7654 I usually refer to the tooling manufacturers feeds and speeds. Harvey tool has an awesome feeds and speeds page that lets you type in their tool part number and it gives you the chart of feeds and speeds for every material.

@cncswiss5999 thanks for the reply , I was pertaining to Turning in a swiss lathe (SB 20 R type G) Do you know how to convert HBW into HB so I may follow tooling manufacturers' speeds & feeds

@@beneipert it’s definitely a bit different mentality than fusion. I wouldn’t mind getting good with fusion though in case they do merge the two someday.

@@DanRudolph haha thanks. I would make a terrible salesman haha

Yeah, a lot of wear forcing the spindle to pump the breaks and reverse unnecessarily

It looks like the brass is being pushed into the cutting bit and the bit is like inside where the brass rod is supported, typically when I see a lathe the cutting bit is the one moving and typically never into the plane of where it’s being clamped! The brass being feed into a stationary cutting bit I feel like would be completely different process more like cutting away brass rather then actually turning it down but it’s a observation cause I don’t do machine work 😂

U don't need to support these on swiss lathe bcs the material is pushed forward and the toll stay always in the same place in Z axis.

its so they can show off the process without the coolant being in the way

We've thrown our swiss guy some tough parts. Had a .0145 x 3.0 turned to a .625-24 thread out of 17-4 H900. We don't know what it was for but it had some stupid tolerances.

Turn section of diameter. Thread. Repeat using macro that continues the thread

Realistically you’re not going to get this fine a thread pitch that long in brass without a thread roller. Brass isn’t strong enough not to break while threading. In steel and possibly titanium it could be done. Can’t really tell how small that diameter starts, but the smallest thread I’m aware of Is #0000-160 with a .021” major. The process described above requires a well maintained machine, as section turning threads requires the encoders to index dead on every time and no backlash whatsoever in the ball screws. The other option would be a thread whirler. Use the subspindle to support as you run it through.

​@@Battle_BeardWow. That's an insane thread. I had to do some design work with stainless 1-64 screws once and hated my life, lol. How the heck do you even work with something that small? I've had splinters larger than that 😳. Don't sneeze I guess 🤷‍♂️.