Posted by Chuck(G) on March 05, 2002 at 14:53:02:
In Reply to: Re: Turning the Shank Down posted by Doug Elliott on March 05, 2002 at 12:55:49:
Doug, my handbooks show the rate of taper is different between the various morse sizes, increasing with the morse taper number (see URL below). Morse #1 is the only one with 0.050 inch/inch of taper.
However, a Jarno taper is constant, regardless of size, at 0.050" inch/inch. I use a Jarno #6 taper reamer for tuba mouthpiece receivers.