[Jim27]

Having some trouble with straight flute router bit gradually pulling out of the WW collet on my Servo Products desktop mill (1980's vintage ). 1/4" collet with 1/4" bit cutting cherry wood. It does a great job at first but then the depth starts increasing due to the collet slipping and eventually stalls the spindle if I don't stop it. I have identified part of the problem as a thin coating on the shank of the new bit that acts as a lube that I need to clean off with solvent. But looking for a torque spec for how much I should be tightening these. They are pretty small so don't want to overdo it.

[Jim27]

Found some torque specs and manual. The drawbar has a philips head screw and a 7/16 hex. The recommendation is to use the philips drive to tighten to avoid over torque. It says the hex is ok but limit torque to 25 in-lbs. I find it much easier and more controllable to use the hex. Guess I need to find a cheap torque wrench for this range.