Collet Chuck and Collet Assortment

After trying out several drill chuck designs (my own included), I've concluded that 3D printed chucks with moving jaws just don't have enough gripping force for common tasks. These collets (similar to ER11 collets), however, can grab onto your bit with much greater force. This collet chuck and collet assortment will handle any diameter from 0.250" (6.35mm) down to 0.044" (1.1mm). I've also included collets for standard 0.250" hex drive and mini 4mm hex drive shanks.The back side of the collet chuck body has a 0.25" hex socket that can be used to help test the collet chuck, but I've included the STEP file for the parts so that this can easily be re-mixed into your own designs.PrintingAll parts print in the orientations provided and without supports. Print the body and ring with 0.2mm layer thickness and the collets with 0.15mm layers. This will keep the layer lines from aligning and locking against each other as the collet seats into the body of the chuck. Also when printing the collets