Precision Twist Drill 5999475 R51 General Purpose Taper Length Drill Bit HSS Bright

The Precision Twist Drill 5999475 is a General Purpose Taper Length Drill Bit from the R51 series, designed for applications requiring greater depth and reach than standard jobber-length drills. The R51 series features long-length, 118-degree conventional point, general-purpose round shank drill bits with a longer flute and overall length for added depth and reach.

Key Features:

• Series: R51 General Purpose Taper Length
• Construction: Made of high-speed steel (HSS) with an uncoated bright finish, suitable for drilling holes to a depth up to six times the diameter of the drill size
• Point Angle: 118-degree conventional point — the most widely accepted standard for drilling in a variety of materials including metal, wood, and synthetics
• Shank: Straight round shank with a shank diameter equal to the drill size
• Cutting Direction: Right-hand cut, right-hand spiral
• Flutes: 2-flute spiral design for efficient chip evacuation
• Finish: Uncoated bright finish helps keep costs down while providing acceptable performance in most general-purpose situations

High-speed steel provides good wear resistance and is suitable for general-purpose applications across both ferrous and non-ferrous materials, including magnetic soft steel, structural steel, plain carbon steel, alloy steel, stainless steel, cast iron, titanium, nickel, copper, brass, and bronze.

Precision Twist Drill has delivered quality cutting tools for precision engineering environments — including aerospace and automotive subcontracting — since 1952. The R51 series is a trusted choice for machinists and fabricators who need reliable, deep-reach drilling performance in everyday shop and industrial settings.