Precision Twist C114COMB High Speed Steel Jobber Length Drill Bit Set, Black Oxide Finish with Metal Case, 118 Degree Conventional Point, 114 piece, Combination, 1/16" 1/2" x 64ths, #60 to #1, 1 to 13mm x 0.5 mm
Price:
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Product Feature
- Set of 114 jobber length drill bits includes inch sizes 1/16" through 1/2" in 1/64" increments, one each of wire gauge sizes #60 through #1, and metric sizes 1.0 through 13.0 mm in 0.5 mm increments
- High-speed steel (HSS) provides hardness for wear resistance
- 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
- Drill bits conform to ANSI standards
Product Description
This Precision Twist C114COMB jobber length drill bit set contains 114 high-speed steel drill bits, including inch sizes 1/16" through 1/2" in 1/64" increments, one each of wire gauge sizes #60 through #1, and metric sizes 1.0 through 13.0 mm in 0.5 mm increments, with a black oxide finish and a 118-degree conventional point for use in general-purpose applications on ferrous material. 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. 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. 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.
What’s in the Box?
- 114 drill bits, inch sizes 1/16" through 1/2" in 1/64" increments, one each of wire gauge sizes #60 through #1, and metric sizes 1.0 through 13.0 mm in 0.5 mm increments
- Metal case
Precision Twist C114COMB High Speed Steel Jobber Length Drill Bit Set, Black Oxide Finish with Metal Case, 118 Degree Conventional Point, 114 piece, Combination, 1/16" 1/2" x 64ths, #60 to #1, 1 to 13mm x 0.5 mm Review
I purchased these black oxide finished drill bits to replace a similar aging set that I have owned for about 10 years. An item such as this is difficult to judge online from the product description and it is something you most likely will buy once in a decade, except to replace the common sizes you wear out with regular use. I have been very pleased with the both the general quality of these bits and precision of the finished product produced using these bits. I appreciate the index case they arrived and are stored in, as the chart printed inside among other uses, really helps when you are determining what bit you need when creating threads in your work product. All in all a quality drill bit set that I am comfortable recommending to anyone requiring exacting tolerances in their projects.Most of the consumer Reviews tell that the "Precision Twist C114COMB High Speed Steel Jobber Length Drill Bit Set, Black Oxide Finish with Metal Case, 118 Degree Conventional Point, 114 piece, Combination, 1/16" 1/2" x 64ths, #60 to #1, 1 to 13mm x 0.5 mm" are high quality item. You can read each testimony from consumers to find out cons and pros from Precision Twist C114COMB High Speed Steel Jobber Length Drill Bit Set, Black Oxide Finish with Metal Case, 118 Degree Conventional Point, 114 piece, Combination, 1/16" 1/2" x 64ths, #60 to #1, 1 to 13mm x 0.5 mm ...
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