Precision Twist C8R57 High Speed Steel Reduced Shank Drill Bit Set with Plastic Case, Black Oxide Finish, 118 Degree Conventional Point, Inch, 8 Piece, 9/16" to 1" x 16ths
Blасk Frіdау - 80% оƒƒ Precision Twist C8R57 High Speed Steel Reduced Shank Drill Bit Set with Plastic Case, Black Oxide Finish, 118 Degree Conventional Point, Inch, 8 Piece, 9/16 to 1 x 16ths Simple review
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| Material | High Speed Steel |
| Finish Type | Black Oxide |
| Shank Type | Round |
| Cutting Angle String | 118 Degrees |
| Brand | Precision Twist Drill |
- Set of 8 reduced shank drill bits includes inch sizes 9/16" through 1" in 1/16" increments
- High-speed steel (HSS) provides hardness for wear resistance, and the black oxide finish reduces bit wear while promoting chip and coolant flow on ferrous material
- 118-degree conventional point for a range of drilling applications
- Three-flat shank supports higher torque rates than round shank
- Drill bits conform to ANSI standards
Product Description
This Precision Twist C8R57 reduced shank drill bit set contains 8 high-speed steel drill bits, including inch sizes 9/16" through 1" in 1/16" increments, with a black oxide finish and a 118-degree conventional point for use with drilling machines with a 1/2" chuck to create large holes in ferrous materials. High-speed steel (HSS) provides hardness for wear resistance, and the black oxide finish acts as a lubricant to reduce wear while promoting chip and coolant flow. Commonly called Silver and Deming drill bits, these reduced shank drill bits have a drilling depth of 4 times their diameter and a standardized 1/2" diameter shank, which enables drills with a 1/2" chuck to create holes with diameters larger than the chuck. The shank has three flats to support higher torque rates and reduced tool slippage as compared to a round shank. 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. 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.
Dormer Pramet manufactures cutting tools under the following brands: Precision Twist Drill, Dormer, Union Butterfield and Pramet. The company has locations around the world, and provides tools adhering to ANSI, NAS, and DIN standards.
What’s in the Box?
- 8 drill bits, inch sizes 9/16" through 1" in 1/16" increments
- plastic case
Specifications for this item
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