Precision Twist Drill 5999787 R51 1-7/16 in HSS Taper Length Drill Bit

The Precision Twist Drill 5999787 is a Series R51 General Purpose Taper Length Drill Bit designed for professionals who need extended reach and depth in a reliable, everyday cutting tool. With a 1-7/16 in (1.4375 in) drill diameter, 14-3/4 in overall length, and 9-1/8 in flute length, this taper length drill is built for applications where standard jobber-length bits simply cannot reach.

Key Features:

• Series: R51 General Purpose Taper Length
• Drill Diameter: 1-7/16 in (1.4375 in)
• Overall Length (OAL): 14-3/4 in
• Flute Length: 9-1/8 in
• Shank Type: Cylindrical (straight) shank
• Point Angle: 118° conventional point
• Cutting Direction: Right-hand cut, right-hand spiral
• Material: High-Speed Steel (HSS)
• Finish: Bright (uncoated)
• Specification: ANSI

The 118° conventional point is the most widely accepted standard geometry for drilling through a broad range of materials including steel, aluminum, wood, and synthetics. The taper length design provides a longer flute and greater overall reach compared to standard jobber drills, making it ideal for deep-hole drilling in fabrication, maintenance, and manufacturing environments. The bright (uncoated) HSS construction keeps costs competitive while delivering consistent performance across general-purpose applications.

The R51 series is part of the Precision Twist Drill lineup, a trusted brand under Dormer Pramet with decades of experience producing cutting tools for industrial, aerospace, and automotive applications.