Threading Technology – Clamping Technology 520

108 Machine Taps HSS Extra UNC UNF UNEF UN-8 M MF NPSF Rp (BSPP) G NPTF Rc (BSPT) STI SELF-LOCK Accessories NPSM/NPSC Tech. Info v c Product Finder NPT Ordering Example: CW493000.5763 Extra Length · ANSI Shank ø d 2 ø d 1 l 1 l 3 l 2 Reinforced Shank ( 1 / 16 - 3 / 8 ) ø d 2 ø d 1 l 2 l 1 Reduced Shank ( 1 / 2 - 2) VA Stainless Steel Materials NPT P 60° 1:16 American Tapered Pipe Thread, ANSI/ASME B1.20.1 For threads with dryseal material , taper 1:16 Class of Fit Coating TIN Cutting Material HSS Extra HSS Extra Technical Characteristics R15 R15 C / 2-3 C / 2-3 E / O E / O Applications – Material P 1 .1- 3 .1 M 1 .1- 3 .1 P 1 .1- 3 .1 M 1 .1- 3 .1 Tool Identification CW493000 CW493100 Dimens. ID Rekord 2D-VA-AZ Flutes Rekord 2D-VA-AZ TIN Flutes Nominal Size ø d 1 T.P.I. inch l 1 l 2 l 3 ø d 2 1 / 16 27 3.543 0.69 1.161 0.3125 0.234 .5763 3 3 1 / 8 27 3.937 0.75 1.299 0.4375 0.328 .5764 3 3 1 / 4 18 3.937 1.06 1.772 0.5625 0.421 .5765 3 3 3 / 8 18 4.331 1.06 1.850 0.7000 0.531 .5766 3 3 1 / 2 14 5.512 1.38 — 0.6875 0.515 .5767 5 5 3 / 4 14 5.512 1.38 — 0.9063 0.679 .5768 5 5 1 11 1 / 2 6.299 1.75 — 1.1250 0.843 .5769 1 1 / 4 11 1 / 2 6.693 1.75 — 1.3125 0.984 .5770 1 1 / 2 11 1 / 2 7.480 1.75 — 1.5000 1.125 .5771 2 11 1 / 2 7.874 1.75 — 1.8750 1.406 .5772 Taper reamers for taper holes 1:16, see page 118 Nominal Size ø d 1 T.P.I. inch ø D 1 ø D 2 ø D 3 (+0.002) t 1 1 / 16 27 0.2421 0.2343 0.2516 0.4646 1 / 8 27 0.3346 0.3268 0.3441 0.4685 1 / 4 18 0.4331 0.4232 0.4472 0.6850 3 / 8 18 0.5669 0.5571 0.5827 0.6969 1 / 2 14 0.7008 0.6870 0.7213 0.9094 3 / 4 14 0.9114 0.8976 0.9319 0.9291 1 11 1 / 2 1.1437 1.1280 1.1689 1.1181 1 1 / 4 11 1 / 2 1.4882 1.4705 1.5138 1.1378 1 1 / 2 11 1 / 2 1.7264 1.7106 1.7528 1.1378 2 11 1 / 2 2.1988 2.1831 2.2268 1.1535 Thread Hole Preparatory Diameters for Tapered Pipe Thread NPT, Taper 1:16 A) Cylindrical preparation of thread hole B) Tapered preparation of thread hole ø D 1 t 1 ø D 3 ø D 2 t 1 Taper 1:16 The minimum drilling depth t 1 includes the reach of screw by hand L 1 and the effective depth L 3 to ANSI/ASME B1.20.1 as well as the chamfer of the tap. Additional drilling-down has to be determined by the user according to the construction of the workpiece. For series production it is recommended that the minor thread dia. be made as per B. Special taps are required for blind holes where the minimum depths t 1 as listed in the above table cannot be met. In this case please supply a sketch with blind hole dimensions along with the order.