DIN69871-A/B Toolholder StandardDIN69871 Form A/AD/B/ADB f2Type ANo coolant through holef3 f1 L1 a L6 L7 8°17'50" d3 G d8 d6 d5 b d1 L5 L4 L5 d Type AD Central coolant hole A Type B d12 A-A Coolant through flange 30° 20° e1 e1 A-A A Type AD Coolant through spindle A Type ADB A Type B Coolant through flange Shank a±0.1 b (H12) d d1 G d3 (H7) d5 ±0.05 d6 d8 max f1 ±0.1 SK 30 3.2 16.1 7 31.75 M12 13 59.30 50 45 11.1 SK 40 3.2 16.1 7 44.45 M16 17 72.30 63.55 50 11.1 SK 50 3.2 25.7 7 69.85 M24 25 107.25 97.50 80 11.1 Shank f2 min. f3 -0.1 L1 -0.3 L4 min. L5 -0.3 L6 -0.4 L7 -0.4 e1 ±0.1 d12 TAPER AT3 SK 30 35 19.1 47.80 24 15.0 16.4 19.0 21 4 0.002 SK 40 35 19.1 68.40 32 18.5 22.8 25.0 27 4 0.003 SK 50 35 19.1 101.75 47 30.0 35.5 37.7 42 6 0.004 564 ISCAR