Threading Technology – Clamping Technology 520

292 UNC UNF UN M MF NPSF Rp (BSPP) G W BSW, BSF NPTF Rc (BSPT) STI BGF ZBGF GSF (Aero) GSF-Z GF(I), GF-Z GF-Vario-Z GF-H ZGF(I) CIRC-GF Gigant FPC, FMC MoSys SELF-LOCK Accessories Tech. Info v c / f z Product Finder GFI-KEG NPT Thread Mills, Tapered, Long Design GFI-KEG Ordering Example: GF195301.5763 Thread Hole Preparatory Diameters for Tapered Pipe Thread NPT, Taper 1:16 A) Cylindrical preparation of thread hole ø D 1 t 4 B) Tapered preparation of thread hole ø D 3 ø D 2 t 4 Taper 1:16 Nominal size ø D T.P.I. inch ø D 1 ø D 2 ø D 3 (+0.002) t 4 1 / 16 27 0.2421 0.2343 0.2516 0.3268 1 / 8 27 0.3346 0.3268 0.3441 0.3268 1 / 4 18 0.4331 0.4232 0.4472 0.4783 3 / 8 18 0.5669 0.5571 0.5827 0.4902 1 / 2 14 0.7008 0.6870 0.7213 0.6417 3 / 4 14 0.9114 0.8976 0.9319 0.6417 1 11 1 / 2 1.1437 1.1280 1.1689 0.7697 1 1 / 4 11 1 / 2 1.4882 1.4705 1.5138 0.7894 1 1 / 2 11 1 / 2 1.7264 1.7106 1.7528 0.7894 2 11 1 / 2 2.1988 2.1831 2.2268 0.8051 NPT/API-LP cutters are manufactured with a corrected profile Application recommendation: You must have an NC program for a spiral formed helix to prevent a profile step Inch Shank Carbide L15 RH + LH 4-5Flutes DIN 6535 HB HE HA ø D For internal tapered threads ø d 2 9 Thr. l 3 ø d 1 l 2 l 1 With coolant grooves along the shank NPT (API-LP) P 60° 1:16 American Tapered Pipe Thread, ANSI/ASME B1.20.1 For threads with dryseal material , taper 1:16 Coating TIALN-T46 Applications – Material P 1 .1- 5 .1 M 1 .1- 4 .1 K 1 .1- 4 .2 N 1 .1- 5 .2 S 1 .1- 2 .6 H 1 .1-2 Nominal Size ø D T.P.I. inch GFI-KEG-VHM L15-SKN-HB TIALN-T46 l 1 l 2 l 3 ø d 1 ø d 2 Flutes 1 / 16 27 ⎫ ⎬ ⎭ 2 1 / 4 0.536 1 3 / 8 0.232 5 / 16 4 GFT8B209.9676 1 / 8 27 1 / 4 18 ⎫ ⎬ ⎭ 3 1 / 4 0.804 1 25 / 32 0.399 1 / 2 4 GFT8B219.9677 3 / 8 18 1 / 2 14 ⎫ ⎬ ⎭ 3 1 / 2 1.034 1 29 / 32 0.561 5 / 8 4 GFT8B239.9678 3 / 4 14 1 11 1 / 2 ⎫ ⎪ ⎬ ⎪ ⎭ 3 3 / 4 1.259 2 1 / 32 0.772 3 / 4 5 GFT8B259.9679 1 1 / 4 11 1 / 2 1 1 / 2 11 1 / 2 2 11 1 / 2 new