스파이럴탭 STMunit (mm) CODE NO. THREADS Chamfer Lead Thread Length Overall Length Shank Dia Length of Square Square Number of Flute L1 L2 L Φd L3 L4 F STM 03005 M3 x 0.5 2.5P 10 50 4.0 6 3.2 3 STM 04007 M4 x 0.7 2.5P 12 54 5.0 7 4.0 3 STM 05008 M5 x 0.8 2.5P 14 62 5.5 7 4.5 3 STM 06100 M6 x 1.0 2.5P 18 62 6.0 7 4.5 3 STM 08100 M8 x 1.0 2.5P 22 70 6.2 8 5.0 4 STM 08125 M8 x 1.25 2.5P 22 70 6.2 8 5.0 4 STM 10100 M10 x 1.0 2.5P 24 75 7.0 8 5.5 4 STM 10125 M10 x 1.25 2.5P 24 75 7.0 8 5.5 4 STM 10150 M10 x 1.5 2.5P 24 75 7.0 8 5.5 4 STM 12125 M12 x 1.25 2.5P 26 80 8.5 9 6.5 4 STM 12150 M12 x 1.5 2.5P 26 80 8.5 9 6.5 4 STM 12175 M12 x 1.75 2.5P 26 80 8.5 9 6.5 4 STM 14150 M14 x 1.5 2.5P 28 88 10.5 11 8.0 4 STM 14200 M14 x 2.0 2.5P 28 88 10.5 11 8.0 4 STM 16150 M16 x 1.5 2.5P 28 95 12.5 13 10.0 4 STM 16200 M16 x 2.0 2.5P 28 95 12.5 13 10.0 4 STM 18150 M18 x 1.5 2.5P 32 100 14.0 14 11.0 4 STM 18200 M18 x 2.0 2.5P 32 100 14.0 14 11.0 4 STM 18250 M18 x 2.5 2.5P 32 100 14.0 14 11.0 4 STM 20150 M20 x 1.5 2.5P 32 105 15.0 15 12.0 4 STM 20200 M20 x 2.0 2.5P 32 105 15.0 15 12.0 4 STM 20250 M20 x 2.5 2.5P 32 105 15.0 15 12.0 4 CUTTING DATA – TAP Material Cast iron FC Strong cast iron FCD East · Bronze CU · PB Aluminum AL HTM STM PT.PF HTM STM PT.PF HTM STM PT.PF HTM STM PT.PF SPEED (m/min) 10 ~ 20 10 ~ 20 10 ~ 20 10 ~ 20 10 ~ 20 10 ~ 20 10 ~ 20 10 ~ 20 10 ~ 20 10 ~ 20 10 ~ 20 10 ~ 20