I’m tired of breaking my little twist drill bits. Is there anything I should watch out for if I use a 1/16" carbide end mill in the tailstock of the lathe? I have an ER-20 collet for 1/16". Is there an ER-20 chuck in the lathe room? Will one from the Tormach drawer work (R8, I think)?
2 flute, cutting brass, if it matters.
We don’t have any collect chucks for the tail stock. But I don’t see any issue with using an end mill if you can hold it securely. And I think only your end mill and piece would be at risk.
Could we order a collet and collet holder for metal lathe so the collets don’t disappear from other equipment locations?
I’m going to try holding the end mill in the drill chuck for now, but is this what I’d want?
ER16A ER20A MT1 MT2/MT3/MT4-Collet Chuck Holder Drawbar Thread Shank MTB Arbor | eBay in the ER20-MTB4 size?
I think it is an mtb4. The price is inexpensive. I say we give it a go
and if it turns out the concentricity is crap, we’ll have another reason to get a toolpost grinder 
Yeah, the Grizzly manual says “The barrel has an MT#4 (morse taper #4)
bore”.
I’ll order this and give it a try.
All roads lead to a tool post grinder 
The collet chuck finally showed up. I’ve booked some time on Monday to try it out.
One tricky thing is that it doesn’t release when you fully retract the tail stock. I think it needs a protrusion at the back end to push it out. I’m 80% sure the back of it is M16x2.0, so hopefully a bolt will just work. I would have made one, but I don’t know how to threadmill on the lathe.
I was just watching a blondihacks video where she recommended getting one of these.
I love her videos. Definitely the best introduction to machining concepts that I’ve seen.
