leehljp
Member Liaison
Can someone maybe give some advice on a headstock problem with my Rikon lathe? I figure there is not much that can be done, but I thought I would at least ask.
INSIDE: Any MT2 drives inserted into the headstock has perfect run out. Smooth!
OUTSIDE: But, anything that is added to the outside, - screwed onto the 1 inch threads has serious run out. Nearly unacceptable run out - .05 inch. The outside threads are not machined to the inside tolerances. BUT, I think the problem is in the seating more than with the threads themselves.
I have a Grizzly chuck (http://www.grizzly.com/products/H6265) and at first, I attributed the run out to the chuck quality.
Then I ordered a Beale chuck set in July. It does the same thing. Imagine having a Beale chuck set and visually seeing run out. In spite of this, the Grizzly chuck does a fair job of letting me drill on the lathe.
I think the problem is here: IMO, the Grizzly and Beale should "seat" (my words) onto the threaded head, bringing it into alignment and tolerance. Both the Griz and Beale "seat" firmly, but out of acceptable tolerance.
I can accept the tolerances issue with the grizzly chuck for drilling blanks, but the Beale chuck set really causes pens to be out of round noticeably. After buying the Beale and discovering the problem, I changed to the "no mandrel" method for finishing. However, I still would like to use my Beale set.
MY FAULT:
Since I didn't start using a chuck regularly (only pen mandrels) until early last spring, I didn't notice the problem. And since I have it with me here in Japan, I feel I waited too long to get Rikon to do anything about it.
Suggestions? Is it a seating problem, or threading problem? Or look somewhere else?
Thanks
FIXED NOTES IN POST BELOW.
INSIDE: Any MT2 drives inserted into the headstock has perfect run out. Smooth!
OUTSIDE: But, anything that is added to the outside, - screwed onto the 1 inch threads has serious run out. Nearly unacceptable run out - .05 inch. The outside threads are not machined to the inside tolerances. BUT, I think the problem is in the seating more than with the threads themselves.
I have a Grizzly chuck (http://www.grizzly.com/products/H6265) and at first, I attributed the run out to the chuck quality.
Then I ordered a Beale chuck set in July. It does the same thing. Imagine having a Beale chuck set and visually seeing run out. In spite of this, the Grizzly chuck does a fair job of letting me drill on the lathe.
I think the problem is here: IMO, the Grizzly and Beale should "seat" (my words) onto the threaded head, bringing it into alignment and tolerance. Both the Griz and Beale "seat" firmly, but out of acceptable tolerance.
I can accept the tolerances issue with the grizzly chuck for drilling blanks, but the Beale chuck set really causes pens to be out of round noticeably. After buying the Beale and discovering the problem, I changed to the "no mandrel" method for finishing. However, I still would like to use my Beale set.
MY FAULT:
Since I didn't start using a chuck regularly (only pen mandrels) until early last spring, I didn't notice the problem. And since I have it with me here in Japan, I feel I waited too long to get Rikon to do anything about it.
Suggestions? Is it a seating problem, or threading problem? Or look somewhere else?
Thanks
FIXED NOTES IN POST BELOW.