Precision Twist C29R10P High Speed Steel Jobber Length Drill Bit Set, Uncoated (Bright) Finish, 118 Degree Conventional Point, Inch, 29 piece, 1/16 to 1/2 x 64ths by Precision Twist

商品説明

This Precision Twist C29R10P jobber length drill bit set contains 29 high-speed steel drill bits, including inch sizes 1/16" through 1/2" in 1/64" increments, with an uncoated (bright) finish and a 118-degree conventional point for use in general-purpose applications on a range of materials, especially soft metals. High-speed steel (HSS) provides hardness for wear resistance, and the uncoated (bright) finish provides an untreated surface. These jobber length drill bits have a drilling depth up to four times their diameter. The round shank accommodates most drill chucks. The set comes in a metal index case with labeled compartments for identification and organization. Drill bits conform to American National Standards Institute (ANSI) standards.Drill bits are cutting tools used to make holes in a range of materials using machines such as handheld portable drills, machining centers, and lathes. Drill bits come in a variety of lengths and types, the most common of which is the twist drill bit. The round, twisted shaft of the twist drill bit typically has two cutting edges and flutes. The helical twist of the flutes brings chips up and away from the cutting edges and allows for coolant to reach the cutting edges. Jobber length twist drill bits, the most common length of twist drill bit, offer a good compromise of length and reach to work with the widest range of materials and applications. Mechanic's length twist drill bits (also called maintenance length) are a little shorter than jobber length and less prone to deflection when drilling.