replying to drillpress, Chitty wrote:
Looking for info on a JT 2 1/2 taper drill chuck also.
Mine is a similar Taiwan marketed in North America.
The Jacobs 2 1/2 taper is its very own taper but used widely in the era on
Japanese configuration but appears to be no longer available these days. The
JT 6 is close but a different bird.
Anyone have any luck?
The spindle on my machine is a one piece unit with the lower end being a male
JT 2 1/2 that is intended to mount the appropriate chuck directly to the
spindle without the typical double ended arbor between the spindle and chuck.
Only option Ive found is to pull the spindle and hope a machinist can
convert the spindle without error to a modern available taper.
Share your info please!

--
for full context, visit https://www.polytechforum.com/metalw...nt-478760-.htm