... set screw . The contribution of the tool - toolholder connection of the face mount toolholders to the total ... ( 1 ) 1.1 2.8 1.7 0.25 Gage Mandrel ( 2 ) 0.9 2.6 1.7 0.25 Gage Mandrel ( 3 ) 0.5 2.2 1.7 0.29 Standard Collet , ER 40/16 8.8 31.2 ...