I'm not sure if I understand this correctly, but the 1/2" and 1/4" collets for my 7518 are not blind - ie the bit is free to pass completely through the collet.
-tulsah
Originally Posted by ger21  The PC 690, 892 and 7518 all use the same collets, and none have a hole behind the collet. Also, never bottom out the bit before tightening, the collet won't tighten correctly. |