Specifications

Conform to IS 5100:2002
ISO 235:1980
BS 328 Part 1:1993
DIN 1897:1984

TWIST DRILLS - Parallel Shank Twist Drills(Stub Series) Size(h8)(mm) Size(h8)(inch) Size(h8) No./Letter Flute Length Overall Length 1.00 - - 6 26 1.02 - 60 6 26 1.04 - 59 6 26 1.07 - 58 7 28 1.09 - 57 7 28 1.10 - - 7 28 1.18 - 56 7 28 1.19 3/64 - 8 30 1.20 - - 8 30 1.30 - - 8 30 1.32 - 55 8 30 1.40 - 54 9 32 1.50 - - 9 32 1.51 - 53 10 34 1.59 1/16 - 10 34 1.60 - - 10 34 1.61 - 52 10 34 1.70 - 51 10 34 1.78 - 50 11 36 1.80 - - 11 36 1.85 - 49 11 36 1.90 - - 11 36 1.93 - 48 12 38 1.98 5/64 - 12 38 1.99 - 47 12 38 2.00 - - 12 38 2.06 - 46 12 38 2.08 - 45 12 38 2.10 - - 12 38 2.18 - 44 13 40 2.20 - - 13 40 2.26 - 43 13 40 2.30 - - 13 40 2.37 - 42 14 43 2.38 3/32 - 14 43 2.40 - - 14 43 2.44 - 41 14 43 2.49 - 40 14 43 2.50 - - 14 43 2.53 - 39 14 43 2.58 - 38 14 43 2.60 - - 14 43 2.64 - 37 14 43 2.70 - - 16 46 2.71 - 36 16 46 2.78 7/64 - 16 46 2.79 - 35 16 46 2.80 - - 16 46 2.82 - 34 16 46 2.87 - 33 16 46 2.90 - - 16 46 2.95 - 32 16 46 3.00 - - 16 46 3.05 - 31 18 49 3.10 - - 18 49 3.17 1/8 - 18 49 3.20 - - 18 49 3.26 - 30 18 49 3.30 - - 18 49 3.40 - - 20 52 3.45 - 29 20 52 3.50 - - 20 52 3.57 9/64 28 20 52 3.60 - - 20 52 3.66 - 27 20 52 3.70 - - 20 52 3.73 - 26 20 52 3.80 - 25 22 55 3.86 - 24 22 55 3.90 - - 22 55 3.91 - 23 22 55 3.97 5/32 - 22 55 3.99 - 22 22 55 4.00 - - 22 55 4.04 - 21 22 55 4.09 - 20 22 55 4.10 - - 22 55 4.20 - - 22 55 4.22 - 19 22 55 4.30 - 18 24 58 4.37 11/64 - 24 58 4.39 - 17 24 58 4.40 - - 24 58 4.50 - 16 24 58 4.57 - 15 24 58 4.60 - - 24 58 4.62 - 14 24 58 4.70 - 13 24 58 4.76 3/16 - 26 62 4.80 - 12 26 62 4.85 - 11 26 62 4.90 - - 26 62 4.91 - 10 26 62 4.98 - 9 26 62 5.00 - - 26 62 5.05 - 8 26 62 5.10 - - 26 62 5.11 - 7 26 62 5.16 13/64 - 26 62 5.18 - 6 26 62 5.20 - - 26 62 5.22 - 5 26 62 5.30 - - 26 62 5.31 - 4 28 66 5.40 - - 28 66 5.41 - 3 28 66 5.50 - - 28 66 5.56 7/32 - 28 66 5.60 - - 28 66 5.61 - 2 28 66 5.70 - - 28 66 5.79 - 1 28 66 5.80 - - 28 66 5.90 - - 28 66 5.94 - A 28 66 5.95 15/64 - 28 66 6.00 - - 28 66 6.05 - B 31 70 6.10 - - 31 70 6.15 - C 31 70 6.20 - - 31 70 6.25 - D 31 70 6.30 - - 31 70 6.35 1/4 E 31 70 6.40 - - 31 70 6.50 - - 31 70 6.53 - F 31 70 6.60 - - 31 70 6.63 - G 31 70 6.70 - - 31 70 6.75 17/64 - 34 74 6.76 - H 34 74 6.80 - - 34 74 6.90 - - 34 74 6.91 - I 34 74 7.00 - - 34 74 7.04 - J 34 74 7.10 - - 34 74 7.14 9/32 K 34 74 7.20 - - 34 74 7.30 - - 34 74 7.37 - L 34 74 7.40 - - 34 74 7.49 - M 34 74 7.50 - - 34 74 7.54 19/64 - 37 79 7.60 - - 37 79 7.67 - N 37 79 7.70 - - 37 79 7.80 - - 37 79 7.90 - - 37 79 7.94 5/16 - 37 79 8.00 - - 37 79 8.03 - O 37 79 8.10 - - 37 79 8.20 - P 37 79 8.30 - - 37 79 8.33 21/64 - 37 79 8.40 - - 37 79 8.43 - Q 37 79 8.50 - - 37 79 8.60 - - 40 84 8.61 - R 40 84 8.70 - - 40 84 8.73 11/32 - 40 84 8.80 - - 40 84 8.84 - S 40 84 8.90 - - 40 84 9.00 - - 40 84 9.09 - T 40 84 9.10 - - 40 84 9.13 23/64 - 40 84 9.20 - - 40 84 9.30 - - 40 84 9.35 - U 40 84 9.40 - - 40 84 9.50 - - 40 84 9.52 3/8 - 43 89 9.58 - V 43 89 9.60 - - 43 89 9.70 - - 43 89 9.80 - W 43 89 9.90 - - 43 89 9.92 25/64 - 43 89 10.00 - - 43 89 10.08 - X 43 89 10.10 - - 43 89 10.20 - - 43 89 10.26 - Y 43 89 10.30 - - 43 89 10.32 13/32 - 43 89 10.40 - - 43 89 10.49 - Z 43 89 10.50 - - 43 89 10.60 - - 43 89 10.72 27/64 - 47 95 10.80 - - 47 95 10.90 - - 47 95 11.00 - - 47 95 11.10 - - 47 95 11.11 7/16 - 47 95 11.20 - - 47 95 11.30 - - 47 95 11.40 - - 47 95 11.50 - - 47 95 11.51 29/64 - 47 95 11.60 - - 47 95 11.70 - - 47 95 11.80 - - 47 95 11.90 - - 51 102 11.91 15/32 - 51 102 12.00 - - 51 102 12.10 - - 51 102 12.20 - - 51 102 12.30 31/64 - 51 102 12.40 - - 51 102 12.50 - - 51 102 12.60 - - 51 102 12.70 1/2 - 51 102 12.80 - - 51 102 12.90 - - 51 102 13.00 - - 51 102 13.10 - - 51 102 13.20 - - 51 102 13.30 - - 54 107 13.40 - - 54 107 13.49 17/32 - 54 107 13.50 - - 54 107 13.60 - - 54 107 13.70 - - 54 107 13.80 - - 54 107 13.89 - - 54 107 13.90 35/64 - 54 107 14.00 - - 54 107 14.25 - - 56 111 14.29 9/16 - 56 111 14.50 - - 56 111 14.68 37/64 - 56 111 14.75 - - 56 111 15.00 - - 56 111 15.08 19/32 - 58 115 15.25 - - 58 115 15.48 39/64 - 58 115 15.50 - - 58 115 15.75 - - 58 115 15.87 5/8 - 58 115 16.00 - - 58 115 16.25 - - 60 119 16.27 41/64 - 60 119 16.50 - - 60 119 16.67 21/32 - 60 119 16.75 - - 60 119 17.00 - - 60 119 17.07 43/64 - 62 123 17.25 - - 62 123 17.46 11/16 - 62 123 17.50 - - 62 123 17.75 - - 62 123 17.86 45/64 - 62 123 18.00 - - 62 123 18.25 - - 64 127 18.26 23/32 - 64 127 18.50 - - 64 127 18.65 47/64 - 64 127 18.75 - - 64 127 19.00 - - 64 127 19.05 3/4 - 66 131 19.25 - - 66 131 19.45 49/64 - 66 131 19.50 - - 66 131 19.75 - - 66 131 19.84 25/32 - 66 131 20.00 - - 66 131 20.24 51/64 - 68 136 20.25 - - 68 136 20.50 - - 68 136 20.64 13/16 - 68 136 20.75 - - 68 136 21.00 - - 68 136 21.03 53/64 - 68 136 21.25 - - 70 141 21.43 27/32 - 70 141 21.50 - - 70 141 21.75 - - 70 141 21.83 55/64 - 70 141 22.00 - - 70 141 22.22 7/8 - 70 141 22.25 - - 70 141 22.50 - - 72 146 22.62 57/64 - 72 146 22.75 - - 72 146 23.00 - - 72 146 23.02 29/32 - 72 146 23.25 - - 72 146 23.42 59/64 - 72 146 23.50 - - 72 146 23.75 - - 75 151 23.81 15/16 - 75 151 24.00 - - 75 151 24.21 61/64 - 75 151 24.25 - - 75 151 24.50 - - 75 151 24.61 31/32 - 75 151 24.75 - - 75 151 25.00 63/64 - 75 151 25.25 - - 78 156 25.40 1 - 78 156 25.50 - - 78 156 25.75 - - 78 156 26.00 - - 78 156 26.19 1.1/32 - 78 156 26.25 - - 78 156 26.50 - - 78 156 26.75 - - 81 162 26.99 1.1/16 - 81 162 27.00 - - 81 162 27.25 - - 81 162 27.50 - - 81 162 27.75 - - 81 162 27.78 1.3/32 - 81 162 28.00 - - 81 162 28.25 - - 84 168 28.50 - - 84 168 28.58 1.1/8 - 84 168 28.75 - - 84 168 29.00 - - 84 168 29.25 - - 84 168 29.37 1.5/32 - 84 168 29.50 - - 84 168 29.75 - - 84 168 30.00 - - 84 168 30.16 1.3/16 - 87 174 30.25 - - 87 174 30.50 - - 87 174 30.75 - - 87 174 30.96 1.7/32 - 87 174 31.00 - - 87 174 31.25 - - 87 174 31.50 - - 87 174 31.75 1.1/4 - 90 180 32.00 - - 90 180 32.50 - - 90 180 32.54 1.9/32 - 90 180 33.00 - - 90 180 33.34 1.5/16 - 90 180 33.50 - - 90 180 34.00 - - 93 186 34.13 1.11/32 - 93 186 34.50 - - 93 186 34.92 1.3/8 - 93 186 35.00 - - 93 186 35.50 - - 93 186 35.72 1.13/32 - 96 193 36.00 - - 96 193 36.50 - - 96 193 36.51 1.7/16 - 96 193 37.00 - - 96 193 37.31 1.15/32 - 96 193 37.50 - - 96 193 38.00 - - 100 200 38.10 1.1/2 - 100 200 38.50 - - 100 200 38.89 - - 100 200 39.00 - - 100 200 39.50 - - 100 200 39.69 - - 100 200 40.00 - - 100 200

Figures Mentioned in red are for reference only. ground flutes upto 13 mm and miled flutes above 13 mm.
Range Of Applications:-For use mainly with portable drilling machines for drilling in sheet metal

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