|Forum topic by BigMP||posted 1504 days ago||1937 views||0 times favorited||13 replies|
1504 days ago
Ok so to make a long story short…
With the dial caliper, I determined that the runout of the bit right above the collet is about 5thou and at the bearing it jumps to about 15thou. I tested it on other bits with the same result including a precision centering pin from Whiteside. Also the the part that the collet screws into is perfectly round and has no runout. So, by process of elimination, I’ve narrowed down to the collet causing problems. I tested both 1/2 and 1/4”, with the 1/4 being better, but not by much(3thou and collet and 10thou and bearing).
The router is a 690 series PC.
I guess my question is has anyone else had these problems?
I would say 4thou runout at the bearing is acceptable on such a long bit, but 15thou makes it unusable.
Any suggestions would be greatly appreciated, and thanks in advance!