The Cleveland 2065 parabolic flute design, jobber length high-speed steel (HSS) drill bit has a 38-degree helix angle, with a 118-degree notched-point drill point and uncoated (bright) surface treatment, which is designed for high-performance drilling applications. It can drill up to 14 times the diameter of the drill deep. The shank diameter is the same as the drill size.
The 2065 series performs best when drilling into low-carbon steel, soft alloy steel, non-ferrous materials, aluminum, and copper alloys. The uncoated finish helps 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. The twist of the flutes brings chips up and away from the cutting edge. The parabolic design allows for smooth and efficient chip, also called swarf evacuation. The higher, also called faster helix provides greater lifting power for chips and works well in deeper holes. The 118-degree notched-point drill point works well for hard and tough materials. The notched point can withstand higher thrust loads and has same benefits as a split-point design. Round shanks allow use with a wide variety of tool holding systems.
Made of HSS, one of the most common tool steels, they offer a good comprise of performance across a wide range of materials and drilling applications and are an economical choice. They can be operated at twice the cutting speed and the cutting edges last longer than carbon-steel. They are made to ANSI and DIN industry standards, which help ensure that drill bits around the world, conform to the same specifications.
The tolerances for various aspects of the Cleveland drill bits are: drill diameter range (inches) through 1/8 +0.0000/-0.0005, over 1/8 through 1/4 +0.0000/-0.0007, over 1/4 through 1/2 +0.0000/-0.0010, over 1/2 through 1 +0.0000/-0.0012, over 1 through 2 +0.0000/-0.0015, over 2 through 3 1/2 +0.0000/-0.0020; drill overall length and flute length #80 through 1/8 +0.1250/-0.0626, over 1/8 through 1/2 +0.1250/-0.1250, over 1/2 through 1 +0.2500/-0.1250, over 1 through 2 +0.2500/-0.2500, over 2 through 3 1/2 +0.3750/-0.3750; drill point angle diameter range (inches) 1/16 through 1/2 included angle (degrees) 118 or 135 +/-5 degrees, over 1/2 through 1 1/2 included angle (degrees) 118 +/-3 degrees, over 1 1/2 through 3 1/2 includes angle (degrees) 118 +/- 2 degrees; drill lip height diameter range (inches) 1/16 through 1/8 total indicator variation (inches) 0.0020, over 1/8 through 1/4 total indicator variation (inches) 0.0030, over 1/4 through 1/2 total indicator variation (inches) 0.0040, over 1/2 through 1 total indicator variation (inches) 0.0050, over 1 through 3 1/2 total indicator variation (inches) 0.0060.
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 can be used in hand-operated drills, standalone drill presses, or a lathe.
Greenfield Industries, which are a part of Top-Eastern Group, is one of the largest manufacturers of twist drills. They also manufacture cutting tools and related products under the following brands: Cleveland, Chicago-Latrobe, Cle-Line, Vermont Tap amp; Die, Bassett, Putnam Tools, Geo Met RJC, H amp; G, Vers-O-Tool, and Acme-Fette. The company has locations around the world, and provides tools adhering to ANSI, NAS, and DIN standards.