■ TPGB (60° Type, Partial Profile) (ap shows the value of radial ap) Type Pitch / TPI Description Corner-R Total ap No. of 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 mm / TPI (rε) (mm) Passes 0.75mm TPGB1102005 0.05 0.44 5 0.15 0.12 0.10 0.05 0.02 1103005 0.80mm TPGB1102005 0.05 0.47 5 0.15 0.14 0.10 0.06 0.02 1103005 1.00mm TPGB1102005 0.05 0.60 6 0.18 0.14 0.12 0.10 0.04 0.02 1103005 1.25mm TPGB1102005 0.05 0.76 7 0.18 0.16 0.14 0.12 0.10 0.04 0.02 1103005 TPGB1102005 0.05 0.92 8 0.20 0.18 0.16 0.14 0.10 0.08 0.04 0.02 1.50mm 1103005 110201 0.10 0.87 8 0.20 0.18 0.16 0.14 0.08 0.05 0.04 0.02 110301 Metric (60°) Internal Thread TPGB1102005 0.05 1.09 9 0.20 0.18 0.16 0.14 0.13 0.12 0.10 0.04 0.02 1.75mm 1103005 110301 0.10 1.04 9 0.20 0.18 0.16 0.13 0.12 0.10 0.08 0.05 0.02 TPGB1102005 0.05 1.25 11 0.20 0.18 0.16 0.14 0.13 0.12 0.10 0.10 0.06 0.04 0.02 2.00mm 1103005 110301 0.10 1.20 11 0.20 0.18 0.16 0.13 0.13 0.12 0.10 0.08 0.05 0.03 0.02 TPGB1102005 0.05 1.57 13 0.23 0.20 0.18 0.18 0.14 0.13 0.12 0.10 0.08 0.07 0.07 0.05 0.02 2.50mm 1103005 110301 0.10 1.52 13 0.23 0.20 0.18 0.18 0.13 0.13 0.12 0.10 0.08 0.07 0.05 0.03 0.02 TPGB1102005 0.05 1.90 15 0.25 0.22 0.20 0.18 0.14 0.14 0.13 0.12 0.12 0.10 0.08 0.08 0.07 0.05 0.02 3.00mm 1103005 110301 0.10 1.85 15 0.25 0.22 0.20 0.18 0.14 0.14 0.13 0.12 0.10 0.10 0.08 0.07 0.05 0.05 0.02 110302 0.20 1.75 14 0.25 0.22 0.20 0.18 0.14 0.14 0.13 0.12 0.10 0.08 0.07 0.05 0.05 0.02 TPGB1102005 0.05 2.22 16 0.25 0.22 0.20 0.18 0.18 0.16 0.16 0.14 0.14 0.12 0.12 0.10 0.10 0.08 0.05 0.02 3.50mm 1103005 110301 0.10 2.17 16 0.25 0.22 0.20 0.18 0.18 0.16 0.16 0.14 0.14 0.12 0.10 0.10 0.08 0.07 0.05 0.02 110302 0.20 2.07 15 0.25 0.22 0.20 0.18 0.18 0.16 0.16 0.14 0.14 0.12 0.10 0.08 0.07 0.05 0.02 ■ Guide for Internal Threading J For the internal threading, pay extra attention to “Stabilizing Bore Dia.” and “chip evacuation”. 1 “Stabilizing Bore Dia.” Because small pitch internal threading has small corner-R(rε), there is variation in the Bore Dia. which may greatly influence the tool life of an insert. In order to eliminate the variation in the Bore Dia., “0” cutting (zero cutting) should be performed as the zero pass, before the first pass in threading. Threading The Bore Dia. is cut with the specified dimension, and the first pass of threading becomes stable. 2 “Chip evacuation” If machining process is continued when chips are tangled with a toolholder and other parts of the machine, it may cause damages to the insert. Set the program with the “single block” Keep the threading starting point 50mm~100mm away from the side of workpiece, and confirm that coolant is flushing down the chips for each pass. Ensure that chips are not tangled; then, start the continuous run. 50mm〜100mm J41