I am having trouble with one particular bit slowly pulling out of the collet when routing a dado. The bit is a Rockler 5/16" two flute straight (not spiral) bit with a 1/2" shank and the problem occurs when I have it installed in my Bosch 1617EVS router in my router table. On three separate occasions, the dado I was routing was deeper at the finish than at the start, with the change in depth being gradual. On one occasion the depth increased about 1/4" over a 10" run. On each occasion the bit was pulling out of the collet. The first time I assumed I had not tightened the bit properly, but on succeeding tries I made sure the bit was tight. I have not had this problem with other bits. Any thoughts on what is happening.
- posted
20 years ago