Drill Bit Size Chart Pdf. Drill bit diameter is the most important factor in the drilling process and it should know precisely as much as possible to sharpen or tolerate the diameter. Drill sizes and conversions drill sizes conversions numbers & letters fractional metric inch mm 100 0.0050 0.127 99 0.0053 0.135 98 0.0055 0.140 97 0.0059 0.150 96 0.0063 0.160 95 0.0067 0.170 94 0.0071 0.180 93 0.0075 0.190 92 0.20 0.0079 0.200 91 0.21 0.0083 0.210 90 0.22 0.0087 0.220 89 0.23 0.0091 0.230 0.24 0.0094 0.240 88 0.0095 0.241 0.25 0.0098 0.250 87.
Drill bit conversion chart numbers & letters wire gauge drill size comparison chart gauge inches mm gauge inches mm gauge inches mm gauge inches mm 80 0.0135 0.343 53 0.0595 1.511 26 0.147 3.734 a 0.234 5.944 79 0.0145 0.368 52 0.0635 1.613 25 0.1495 3.797 b 0.238 6.045 78 0.016 0.406 51 0.067 1.702 24 0.152 3.861 c 0.242 6.147 Machine screw and drill size chart (english) clearance hole drills screw designation tap drill size close fit loose fit number diameter pitch tap size drill diameter drill diameter drill diameter or dia. Drill bits are available in different materials, lengths, and diameters.
£38.89
Download pdf of every drill size chart in this article. A tap drill chart is key in matching pairs of female and male thread that tightly secure together. The drill size chart below contains all commonly used centre drill bit sizes. However, when drilling deeper holes, it is recommended to reduce the rpm and feed rate when more than three times the hole depth to diameter.
