F
f350ca
Forum Guest
Register Today
A buddy got these with a Hardinge lathe he bought from Crown Assests. He had no use for them so gave them to me.
Does anyone recognize the shank, I assume the course thread pulls it into the spindle and it locates on the taper.
I assume this is for precision boring, the cutter has a 40 tpi adjusting screw behind it, then the body can be rotated on the shank, Im guessing on an eccentric for adjustments from 0 to 40 1/10.000 of an inch. Interestingly the scale is logarithmic, makes sense.
A nice little Criterion boring head with the same shank. Found it on their site, its from the 40's
By the address it could be a star.
And lastly this, some sort of adjustable boring bar?
Has the same 40 tpi backup screw on the cutter.
Thanks for looking
Greg
Does anyone recognize the shank, I assume the course thread pulls it into the spindle and it locates on the taper.
I assume this is for precision boring, the cutter has a 40 tpi adjusting screw behind it, then the body can be rotated on the shank, Im guessing on an eccentric for adjustments from 0 to 40 1/10.000 of an inch. Interestingly the scale is logarithmic, makes sense.
A nice little Criterion boring head with the same shank. Found it on their site, its from the 40's
By the address it could be a star.
And lastly this, some sort of adjustable boring bar?
Has the same 40 tpi backup screw on the cutter.
Thanks for looking
Greg
Last edited by a moderator: