![]() ![]() market.ĪNSI B94.11M-1979 sets size standards for jobber-length straight-shank twist drill bits from 1/64 inch through 1 inch in 1/64 inch increments. For example, a set of Forstner bits may contain 10, 15, 20, 25 and 30 mm diameter cutters.įractional-inch drill bit sizes are still in common use in the United States and in any factory (around the globe) that makes inch-sized products for the U.S. Metric dimensioning is routinely used for drill bits of all types, although the details of BS 328 apply only to twist drill bits. There are also Renard series sequences of preferred metric drill bits: This subsetting of standard sizes is in contrast to general practice with number gauge drill bits, where it is rare to find a set on the market which does not contain every gauge. Drill bits of the less routinely used sizes, such as 2.55 mm, would have to be ordered from a specialist drill bit supplier. Sets are not commonly available in smaller size increments, except for drill bits below 1 mm diameter. In 0.1 mm increments, any engineers' store. In 0.5 mm increments, any hardware store. Sets of bits in 1 mm increments might be found on a market stall. Bits at size increments of 1 mm are most commonly available, and lowest price. The price and availability of particular size bits does not change uniformly across the size range. This reflects both the smaller drilled hole diameter tolerance possible on smaller holes and the wishes of designers to have drill bit sizes available within at most 10% of an arbitrary hole size. In smaller sizes, bits are available in smaller diameter increments. For example, British Standard BS 328 defines 230 sizes from 0.2 mm to 25.0 mm.įrom 0.2 through 0.98 mm, sizes are defined as follows, where N is an integer from 2 through 9:įrom 1.0 through 2.95 mm, sizes are defined as follows, where N is an integer from 10 through 29:įrom 3.0 through 13.9 mm, sizes are defined as follows, where N is an integer from 30 through 139:įrom 14.0 through 25.0 mm, sizes are defined as follows, where M is an integer from 14 through 25: Standards organizations define sets of sizes that are conventionally manufactured and stocked. Metric drill bit sizes define the diameter of the bit in terms of standard metric lengths. The case that holds them in an indexed order (by size), via a graduated series of holes, is called a drill index. If you CAN’T find it here ……….Metric drill set, 1.0–6.0 mm by 0.1 mm, jobber length. Made in USA 3.0mm(0.1181) Solid Carbide 3 Flute TiN CoatedĤ.0mm(0.1575) Solid Carbide 3 Flute TiN Coatedĥ.0mm(0.1969) Solid Carbide 3 Flute TiN CoatedĦ.0mm(0.2362) Solid Carbide 3 Flute TiN Coatedħ.0mm(0.2756) Solid Carbide 3 Flute TiN CoatedĨ.0mm(0.3150) Solid Carbide 3 Flute TiN Coatedĩ.0mm(0.3543) Solid Carbide 3 Flute TiN Coatedġ0.0mm(0.3543) Solid Carbide 3 Flute TiN Coatedġ1.0mm(0.4331) Solid Carbide 3 Flute TiN Coatedġ2.0mm(0.4724) Solid Carbide 3 Flute TiN Coatedġ4.0mm(0.5512) Solid Carbide 3 Flute TiN Coatedġ6.0mm(0.6299) Solid Carbide 3 Flute TiN Coated TiN Coated to increase strength on cutting edge. Great for Steel, Stainless steel, Cast Iron, Non-Ferrous, Super Alloys, and hardened materials. Designed to be used in hardened steel, stainless, non ferrous materials and other exotic materials 45-65 Rockwell “C” scale. METRIC Carbide Drill Bits 3 Flute 150°Split Point 28°Helix Jobber TiNģ Flute Carbide Drill Bits, Metric Sizes from 3.0mm to 16mm. DIABLO Auto-Dismantling Reciprocating Saw Blade.NEW ACRYLI-DRILL BITS for Acrylics and Plastics.Masonry Drill Bits for Concrete and Asphalt.Number Size #1 thru #60 M42 Cobalt Drill Bits.Premium Cobalt Drill Bits 9/16 Up To 1-1/2 inches.HEX SHANK Premium Mechanics Length Drill Bit.Number Sizes #1 thru #80 High Speed Drill Bits.Granite Porcelain Glass & Tile Drill Bits.Bellhanger Drill Bits – Long Reach Bits up to 72 Inch.Cobalt Aircraft Extension Drill Bits 6 and 12 Inch Lengths. ![]() End Mills – High Speed, Cobalt & Carbide.Wet Diamond Core Drill Bits for Concrete and Stone.Core Bits – Concrete, Masonry & Asphalt.Drill Bits for hardened Steels 42- 65 Rockwell. ![]()
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