My lathe has a 5 MT spindle nose, and a 5 MT to 3 MT sleeve, but I often use a bit of mild steel in the three jaw chuck, turned to a 30* taper, it can be used over and over, just put it in the chuck and skim it true each time. A bit of steel say 20/30 mm dia x 50 mm long will last for ages. Ian S C

Hi Baldrick

A while back I posted this. **LINK** It shows how to make 2 plugs for a lathe in one setup.
I Later bored one MT3 and the other int40 taper to take the holders I use on my mill.

The method was easy and accurate. Just keep turning the piece end for end, then after resetting the top slide take a small skim; each time it will slide further into the spindle as the fit improves. Check the fit with bluing in the spindle bore. when it is perfect don't forget to do the other end! Once done cut it in half, face, and you are ready to bore.

Cheers
John