![]() ![]() Hence you should know both thicknesses in order to determine the hole diameter. Normally, wires have conductive cable and insulation thickness. Always drilled holes should be equal to or larger than the wire size. Chart showing conversions for fractional inches, letter/wire gauge, decimal inches, and metric: Fractional/Decimal Equivalent. When you drill for screws, this guide will help you to find the drill bit sizes for screws.ĭrill bit size is very important for wirings. There are 25.4 millimeters (mm) in an inch. Below we converted the fractions to decimals so you can compare more easily: 1/32 0.03125 inches. You can use below drill bits when you drill a hole for 3 conductor wires. Caution: Due to rounding, a 1/32 drill bit will make the hole smaller than a 60 drill bit and a 3/64 drill bit will make the hole larger than a 60 drill bit. Each drill bit features a 118-degree standard point configuration for general purpose drilling applications. This drill bit size chart provides a list of sizes in several measurement systems, including fractional, metric, wire gauge number, and letter. ![]() Diameters fall between standard fractional sizes. ![]() The bits drill an exact hole size, making them ideal for tapping. Mostly used gauges are 10, 12, 14, 16, 18, and 20. Wire gauge drill bits are used in wood, metal and plastic applications where more precisely sized holes are required. 3 conductor wires have different size gauges. Wire Gaugeĭrill bit sizes for 2 conductor wires Drill Bit Size for 3 Conductor Wiresģ conductor wires and 3 core cables are the same in name and have 3 conductive cables inside the single wire. It helps to find any drill bit related to the mm or inches easily. I have prepared a guide to find drill bit sizes in inches and mm. When you drill a hole for 2 conductor wires you can select drill bit sizes from below table. Wire gaugeĭrill Bit Sizes for Single Wires Drill Bit Size for 2 Conductor WiresĢ conductor wires, double wires, and 2 core cable wires are the same wires that have 2 wires in a single cable.īoth cables are coated with electrical insulations. So let’s see what are the suitable drill bit sizes for each wire size. When you choose a drill bit for a wire, it should be more or equal to the diameter of the wire (including insulation and conductor). Standard wire sizes and insulation thickness for Poly(Vinyl Chloride) Insulations Drill Bit Sizes For Single Conductor Wires As a result of this, the wire diameter will be increased due to this layer. According to the voltage and current, the layer’s thickness varies. These standard wires are insulated with Poly (Vinyl Chloride) in order to prevent the current leaking. The wire gauge number ranging from 107 to 1 and letters ranging from A to Z.The drill bit size should be equal or more than the wire size Fractional sizes are measured in inches and metric sizes are measured in millimeters. In this drill bit size table, standard size drill bits available in several measurement systems, you can find wire gauge number, letter, fractional and metric drill sizes. ANSI B94.11M-1979 specifies the size standard of straight shank twist drill bits with working length from 1/64 inch to 1 inch in increments of 1/64 inch.ĭrill Size Chart/Table – Drill Bit Dimensions Chart ![]() For additional information about what drill bit to use, you may also want to take a look at the Drill Bit Size Chart which includes. Thus, to convert a 16 drill bit to millimeters, you simply multiply the decimal inches by 25.4 like so: 0.1770 inches x 25.4.
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