ST - ER COLLET CHUCK WITH INTERNAL COOLANT - TWO OPTIONS A ➚ A .00020 58-60 HRc Ra 4µin 1450 psi 1/4”NTP D2 A D1 D J A L Ref L2 L1 Ref T A-A Designation Range L2 L1 L J D1 D D2 T ST3/4X3.000 ER16S .022-.396 3.000 2.150 1.165 M12 .750 1.102 1.575 1.339 ST3/4X3.000 ER20S .041-.514 3.000 2.500 1.240 M12 .750 1.339 1.535 1.339 ST3/4X3.000 ER25S .041-.632 3.000 2.680 1.220 M12 .750 1.654 2.126 1.890 ST1X3.000 ER32S .080-.789 3.000 3.000 1.614 M16 1.000 1.968 2.480 2.323 ST1-1/4X3.000 ER40S .120-1.025 3.000 3.030 1.642 M18X1.5 1.250 2.480 2.992 2.835 831