Dormer A012 High Speed Steel Jobber Drill Bit, Uncoated (Bright) Finish with TiN Coated Tip, Round Shank, 118 Degree Split Point, 3/16" (Pack of 10)
by Precision
26,817% Sales Rank in Industrial & Scientific: 355 (was 95,557 yesterday) Buy new:
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Review & Description
The Dormer A012 jobber length, TiN tipped, split-point, round shank drill bit made of HSS with an uncoated (bright) finish is suitable for drilling to a depth up to four times the diameter of the drill. Good for portable or machine drilling. The shank diameter is the same as the drill size. It was designed for drilling holes into a wide variety of metals and synthetic materials with best performance in steel, cast iron, aluminum magnesium, and synthetic materials.
The A012 series has a type N flute form, with a regular helix angle of 21 to 34 degrees with a special Dormer PS point geometry which offer easier workpiece penetration, improved hole size, and accurate centering when starting the hole. The TiN finish is a gold-colored, ceramic coating that combines hardness and low friction to extend cutting tool life and permit faster cutting speeds than with uncoated tools. The remainder of the drill has a uncoated finish helps keep costs down, yet provides acceptable performance in most situations. The bright finish help increase chip flow in soft materials. Spiral flutes act as a passageway for chip extraction from the hole and for coolant to enter the hole. Right-hand twist brings chips up and away from the cutting edge. Drill bit sizes less than 2.0000 mm/0.0787 inch only have an uncoated finish and do not have a split-point.
Drilling, or hole making, is the most common metalworking operation in the world. Twist drill bits are the most common type of drill bit used. Twist drill bits are commonly used to drill holes with hand-operated drills, standalone drill presses, or lathes. The flutes of the drill bit act a passageway for chip extraction from the hole and for coolant to enter the hole. These drill bits have a right-hand twist that brings chips up and away from the cutting edge. They are made to ANSI (fractional sizing) and NAS 907 type C industry standards, which help ensure that drill bits around the world conform to the same specifications.
Precision manufactures machine tools under the following brands: Precision Twist, Precision Dormer, and Union Butterfield. They have locations around the world, and provide tools adhering to ANSI, NAS, and DIN standards.
Product Details
- Amazon Sales Rank: #95748 in BISS
- Size: 3/16 in
- Brand: Precision
- Model: 572054
- Number of items: 10
Features
- Uncoated (bright) finish with Titanium Nitride (TiN) only at the tip of the cutting tool offers hardness and heat resistance
- Jobber-length drill bits are the most common length drill bit, suitable for a wide range of applications
- 118-degree split-point angles, for general drilling applications with easy starting and accurate drill location
- Round shanks, for use on a variety of tool-holding systems
- High-speed steel (HSS), for use on a wide variety of materials
