SERIES YC TAP DRILL/CHAMFER BODIES TAP DRILL/CHAMFER COMBO C-sink/Chamfer Drilling Coolant 0.18xD1 L1 D3 D2 D1 L2 45° L3 L4 D1 D1 L1 L2 D2 D3 Thread Nom. Point Size Point Full Dia. to Full Dia. to L3 L4 Shank Dia. Chamfer Pocket Body Number Size (inch, mm) Range Chamfer Top of Chmf. Ext. OAL (mm, inch) Dia. Size YC0770025RHR01 3/8 UNC 0.311", 7.90mm .3031-.3110 1.000 1.150 1.800 3.690 15.88mm, 0.625" 0.590 8 YC0820025RHR01 3/8 UNF 0.335", 8.50mm .3228-.3504 1.000 1.150 1.800 3.690 15.88mm, 0.625" 0.610 8 YC0910026RHR01 7/16 UNC 0.370", 9.40mm .3583-.3898 1.060 1.200 1.830 3.720 15.88mm, 0.625" 0.630 9 YC0910026RHR01 7/16 UNF 0.390", 9.90mm .3819-.3898 1.060 1.180 1.820 3.710 15.88mm, 0.625" 0.630 9 YC1050026RHR01 1/2 UNC 0.425", 10.80mm .4134-.4291 1.060 1.170 1.890 3.780 15.88mm, 0.625" 0.630 10 YC1130026RHR01 1/2 UNF 0.453", 11.50mm .4449-.4685 1.060 1.150 1.890 3.780 15.88mm, 0.625" 0.630 11 YC1210026RHR01 9/16 UNC 0.484", 12.30mm .4764-.5079 1.060 1.140 1.890 3.780 15.88mm, 0.625" 0.630 12 YC1300026RHR01 9/16 UNF 0.512", 13.00mm .5118-.5472 1.060 1.120 1.890 3.780 15.88mm, 0.625" 0.630 13 YC1330030RJR01 5/8 UNC 0.539", 13.70mm .5236-.5472 1.200 1.320 2.010 3.980 19.05mm, 0.750" 0.750 13 YC1450030RJR01 5/8 UNF 0.575", 14.60mm .5709-.5866 1.200 1.290 2.030 4.000 19.05mm, 0.750" 0.750 14 YC1650035RJR01 3/4 UNC 0.658", 16.70mm .6496-.6654 1.400 1.470 2.200 4.170 19.05mm, 0.750" 0.780 16 YC1730035RLR01 3/4 UNF 0.689", 17.50mm .6811-.7047 1.400 1.500 2.200 4.400 25.40mm, 1.000" 0.880 17 YC1920041RLR01 7/8 UNC 0.768", 19.50mm .7559-.7835 1.650 1.780 2.480 4.680 25.40mm, 1.000" 1.000 19 YC2040041RLR01 7/8 UNF 0.807", 20.50mm .8031-.8228 1.650 1.750 2.480 4.680 25.40mm, 1.000" 1.000 20 YC0680021SKR00 M08 0.268", 6.80mm .2677-.2913 0.827 0.972 1.650 3.420 14.00mm, 0.551" 0.547 6.8 YC0830026SKR00 M10 0.335", 8.50mm .3268-.3504 1.024 1.138 1.831 3.600 14.00mm, 0.551" 0.551 8 YC1000030SKR00 M12 0.402", 10.20mm .3937-.4291 1.181 1.264 2.047 3.820 14.00mm, 0.551" 0.551 10 YC1200035SMR00 M14 0.472", 12.00mm .4724-.5079 1.378 1.465 2.283 4.170 16.00mm, 0.630" 0.630 12 YC1400039SPR00 M16 0.551", 14.00mm .5512-.5866 1.535 1.622 2.362 4.250 18.00mm, 0.709" 0.709 14 YC1730042SRR00 M20 0.689", 17.50mm .6811-.7047 1.654 1.728 2.480 4.450 20.00mm, 0.787" 0.827 17 YC2100048SSR00 M24 0.827", 21.00mm .8268-.8622 1.890 1.984 2.677 4.880 25.00mm, 0.984" 1.004 21 For Qwik-Twist replaceable tip inserts, see page 512 - 516. Operating guidelines on page 674. 508