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Cleveland 1982SJL Powdered Metal Steel Jobbers' Length Drill Bit
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The Cleveland 1982SJL jobber length powdered-metal steel drill bit has a 30-degree helix angle, with a 135-degree notched-point drill point and Titanium aluminum nitride (TiAlN) surface treatment, which is designed for high performance material-specific (cast iron) drilling applications. The shank diameter is the same as the drill size.
While the 1982SJL also known as Q-PM series can be used on most materials, it is most suitable for drilling into cast iron. 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. Round shanks allow use with a wide variety of tool holding systems. 135-degree notched-point drill point works well for hard and tough materials. The lip clearance is very shallow to provide support for the cutting edges. The shorter cutting edge reduces friction and heat during drilling, increasing tool life. The notched point can withstand higher thrust loads and has same benefits as a split-point design. Powdered-metal steel offers performance that approaches that of solid carbide tools but with the toughness and shock-resistance of high-speed steel. Titanium aluminum nitride (TiAlN) resists heat better than TiN, increasing tool life and performance. It also offers increased hardness compared to TiN and, at high cutting speeds, may reduce the need for lubricants based on the application. It is suitable for machining titanium, nickel-based alloys, cast iron, and stainless steel.
The tolerances for various aspects of the Cleveland drill bits are: drill diameter range through 1/8â +0.0000â/-0.0005â, over 1/8â to 1/4â +0.0000â/-0.0007â, over 1/4â through 1/2â +0.0000â/-0.0010â, over 1/2â to 1â +0.0000â/-0.0012â, over 1â to 2â +0.0000â/-0.0015â, over 2â to 3-1/2â +0.0000â/-0.0020â; drill overall length and flute length #80 through 1/8â +0.1250â/-0.0626â, over 1/8â to 1/2â +0.1250â/-0.1250â, over 1/2â to 1â +0.2500â/-0.1250â, over 1â to 2â +0.2500â/-0.2500â, over 2â to 3-1/2â +0.3750â/-0.3750â; drill point angle diameter range 1/16â to 1/2â included angle 118 or 135 degrees +/-5 degrees, over 1/2â to 1 1/2â included angle 118 degrees +/-3 degrees, over 1-1/2â to 3-1/2â includes angle 118 degrees +/- 2 degrees; drill lip height diameter range 1/16â to 1/8â total indicator variation 0.0020â, over 1/8â to 1/4â total indicator variation 0.0030â, over 1/4â to 1/2â total indicator variation 0.0040â, over 1/2â to 1â total indicator variation 0.0050â, over 1â to 3 1/2â total indicator variation 0.0060â.
Drill bits are cutting tools used to make holes in a range of materials. They are used in machines such as handheld portable drills, drill presses, machining centers, and lathes. Drill bits come in a variety of types and lengths. Twist drill bits are the most common type of drill bit. They are a round, twisted shaft, end-cutting tool with two or more cutting edges and two or more flutes. Jobber drill bits are the most common length of twist bit. They offer a good comprise of length and reach to work with the widest range of materials and applications.
Greenfield Industries manufactures tools under the brand names Cleveland, Chicago-Latrobe, Cle-Line, Vermont Tap amp; Die, Bassett, Putnam Tools, Geometric, Vers-O-Tool, H amp; G, and Acme-Fette. The company owned by Top-Eastern Group and headquartered in Seneca, SC, makes tools that meet American National Standards Institute (ANSI), National Aerospace Standard (NAS), and Deutsches Institut fÃ¼r Normung (DIN) standards.
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