This Precision Twist C60R18P jobber length drill bit set contains 60 high-speed steel drill bits, including one each of wire gauge sizes #60 through #1, 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.
- Set of 60 jobber length drill bits includes one each of wire gauge sizes #60 through #1
- High-speed steel (HSS) provides hardness for wear resistance
- Uncoated (bright) finish is an untreated surface that can be used on a range of materials, especially soft metals
- 118-degree conventional point for a range of drilling applications
- Drill bits conform to 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. Short length twist drill bits (also called stub or screw-machine length) are the shortest and stiffest twist drill bits, helping to reduce the chance of deflection or breakage when drilling. Reduced shank drill bits (also called Silver and Deming drill bits) have a shank that is smaller in diameter than its shaft, permitting drilling machines with either a 1/2″ or 3/4″ drill chuck to create large holes. Long length twist drill bits (also called taper length) are a little longer than jobber length, allowing for deeper holes and longer reach. Extra long twist drill bits (also called extension) are longer than long length twist drill bits for greater reach or for drilling deeper holes.
Precision Dormer manufactures cutting tools under the brands Precision Twist, Dormer, and Union Butterfield. The company, headquartered in Crystal Lake, IL, meets International Organization for Standardization (ISO) standards 9001 and 14000.
The product contains 60 drill bits, one each of wire gauge sizes #60 through #1 and it comes in a sturdy metal box.
Precision Twist C60R18P High Speed Steel Jobber Length Drill Bit Set is a great value for invested money and a valuable asset for every toolbox! Keep in mind that it is a 60 piece set! If you look at the price of individual drill bits in your local hardware store or online you will learn that it is much cheaper to buy a complete set like this!