Description

Since 1952, Precision Twist has applied, experience, knowledge and craftsmanship to its high speed steel and solid carbide drill lines. Today, Precision Twist is recognized as a leading supplier of quality cutting tools in the industry. Small Parts carries an extensive line of Precision Twist Products. High speed steel (HSS) can withstand higher temperatures without losing its temper (hardness). This property allows HSS to cut faster than high carbon steel, hence the name high speed steel. At room temperature HSS and high carbon steel have an equivalent hardness; only at elevated temperatures does HSS become advantageous. Surface Feet Per Minute (SFM) Ratings as follows: Steels < 350 BHN (Brinnel Hardness Number) = 45 SFM, Cast Iron < 320 BHN = 55 SFM, Titanium < 270 BHN = 50 SFM, Nickel < 150 BHN = 50 SFM. The Split-Point, or Crankshaft Point, has gained widespread use and is applied to both 118 and 135 Degree included point angles. Its main advantages are the ability to reduce thrust and eliminate walking at the drill piont. This is a distinct advantage when the drill is used in a portable drill or in drilling applications where bushings cannot be used. The split-point also has two positive rake cutting edges extending to the center of the drill, which can assist as a chipbreaker to produce small chips which can readily be ejected.

Features

• Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys
• When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging

Description

Precision Twist Drill parabolic flute drill bits, these have a large flute space for greater chip flow and improved coolant flow to the drill bit point. These factors allow bits to drill deeper and produce closer hole tolerances more quickly than regular jobber bits. A large cross section increases rigidity and strength. Bits have a reduced margin width to lessen contact between the bit and the hole sides to minimize friction and heat. A self centering 135 degree split point penetrates faster than other point styles, produces smaller chips for better chip flow, and will not skip or walk when starting a hole. The shank diameter is the same as the drill bit size.

Description

Precision Twist Drill parabolic flute drill bits, these have a large flute space for greater chip flow and improved coolant flow to the drill bit point. These factors allow bits to drill deeper and produce closer hole tolerances more quickly than regular jobber bits. A large cross section increases rigidity and strength. Bits have a reduced margin width to lessen contact between the bit and the hole sides to minimize friction and heat. A self centering 135 degree split point penetrates faster than other point styles, produces smaller chips for better chip flow, and will not skip or walk when starting a hole. The shank diameter is the same as the drill bit size.

Description

Since 1952, Precision Twist has applied, experience, knowledge and craftsmanship to its high speed steel and solid carbide drill lines. Today, Precision Twist is recognized as a leading supplier of quality cutting tools in the industry. Small Parts carries an extensive line of Precision Twist Products. High speed steel (HSS) can withstand higher temperatures without losing its temper (hardness). This property allows HSS to cut faster than high carbon steel, hence the name high speed steel. At room temperature HSS and high carbon steel have an equivalent hardness; only at elevated temperatures does HSS become advantageous. Surface Feet Per Minute (SFM) Ratings as follows: Steels < 350 BHN (Brinnel Hardness Number) = 45 SFM, Cast Iron < 320 BHN = 55 SFM, Titanium < 270 BHN = 50 SFM, Nickel < 150 BHN = 50 SFM. The Split-Point, or Crankshaft Point, has gained widespread use and is applied to both 118 and 135 Degree included point angles. Its main advantages are the ability to reduce thrust and eliminate walking at the drill piont. This is a distinct advantage when the drill is used in a portable drill or in drilling applications where bushings cannot be used. The split-point also has two positive rake cutting edges extending to the center of the drill, which can assist as a chipbreaker to produce small chips which can readily be ejected.

Description

135 Degree Cobalt Drill Bits are good forFor faster drilling in high-tensile materials such as Stainless Steel, Titanium, and various alloys.

Features

• Adheres to NAS 907 standards, used in the aerospace industry
• Short-length drill bits, for better rigidity and increased strength
• High-speed steel (HSS) containing cobalt is a good combination of toughness and hardness, for use on drilling through hard substances
• Gold oxide, retains cutting fluid and prevent chip to tool welding
• 135-degree split point angles, good for hard, tough materials

Features

• Adheres to NAS 907 standards, used in the aerospace industry
• Short-length drill bits, for better rigidity and increased strength
• High-speed steel (HSS) containing cobalt is a good combination of toughness and hardness, for use on drilling through hard substances
• Gold oxide, retains cutting fluid and prevent chip to tool welding
• 135-degree split point angles, good for hard, tough materials

Features

• Adheres to NAS 907 standards, used in the aerospace industry
• Short-length drill bits, for better rigidity and increased strength
• High-speed steel (HSS) containing cobalt is a good combination of toughness and hardness, for use on drilling through hard substances
• Gold oxide, retains cutting fluid and prevent chip to tool welding
• 135-degree split point angles, good for hard, tough materials

Features

• Adheres to NAS 907 standards, used in the aerospace industry
• Short-length drill bits, for better rigidity and increased strength
• High-speed steel (HSS) containing cobalt is a good combination of toughness and hardness, for use on drilling through hard substances
• Gold oxide, retains cutting fluid and prevent chip to tool welding
• 135-degree split point angles, good for hard, tough materials