Cutting speed (rpm) when case trimming or neck lathing

[Campbell]

Please will you advise me re the above-mentioned.

Does one use a slow rpm (200-400) or higher?

Many thanks in advance.

 

[Dusty Stevens]

I turn necks at like 50rpm, and my neck turning tool still gets hot. I cant imagine going any faster and getting a good finish or repeatable measurement as the tool heats up

 

[retired]

low speed, good lube, claening with compressed air adds cooling

 

[JohnKielly]

I was shown how to cool & lubricate my neck turning tool by dunking it in water between cuts. It's worked for me so far.

My little 3.6 volt drill runs at around 150 rpm unloaded.

 

[WillyTP]

Are you turning necks on a lathe? If so you can use the method Jackie Schmidt does and then run higher RPM’s. If using neck turning tools then keep it slow and low and lubed.

 

[ireload2]

If you press the case onto a dowel pin or spud in a lathe use a little coolant and run the lathe as fast as you want.

If you are using a hand turning tool the pilot friction in the neck will generate a lot of heat that will cause the tool to expand. Run it much slower, lube the pilot and cool between cases if you need to.

 

[ClassCat]

90- 120 RPM

 

[Attrum]

I turn my necks at 70rpm and cool the neck turning tool in an alcohol bath after each case is turned. Make sure you’re using cutting oil on the manderel and the outside of the neck.

 

[retired]

the lathe i used today had 70 rpm as its low speed, so that is what i used.
i mount the cutter in the lathe and hold the case with a tool.
popped a primer pocket reamer in the lathe, and did the pockets also.

 

[Campbell]

View attachment 1048745 90- 120 RPM

I like your setup!

I have very recently discovered that most cordless drills suffer from "chuck wobble" technically known as run out. Please will you let me know where can I source the motors as in your setup.

Many thanks in advance

Cam

 

[hydrotherapy]

 

[nmkid]

Well, when I first started neck turning the mandrel used to get so hot I couldn't hold on to it. I just merrily went along my way. A small bowl filled with crushed ice, ( to dump the cutting tool into) was a prerequisite. Then, along came Accurate Shooter. Sizing brass for minimum neck tension, expander mandrels and the rest is history. A couple of weeks ago I turned 50 pcs. of Peterson 6mm CM brass to 22 CM and never had to stop and let things cool down at all.

 

[searcher]

Slow speed (30-70 r.p.m.) and well-lubed seems to keeps things running pretty "cool"

 

[KenOath]

Anyone tried this new powered version??