Precision Twist Drill 5999692 Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5999692 is a taper length, straight-shank drill bit designed for general-purpose hole-making across a wide range of materials. Built from high speed steel (HSS) with a bright, uncoated finish, it features a 118-degree standard point angle and a web-thinned, tapered web configuration that reduces thrust at entry. The overall length is 10 inches, with a flute length of 6.125 inches, giving it extended reach compared to a jobber-length bit. The 0.8125-inch (13/16-inch) diameter is matched to a straight shank of the same diameter. This bit suits machinists, fabricators, and maintenance technicians who need reliable, repeatable drilling performance in production and field settings.

The 5999692 is suited for drilling into alloy steel, carbon steel, stainless steel, cast iron, malleable iron, hardened steel, aluminum, aluminum alloy, brass, bronze, high strength bronze, copper, nickel, nickel alloy, magnesium, magnesium alloy, cermet, graphite, and reinforced plastic materials. Its taper length body is commonly used in applications requiring deeper hole penetration than a standard jobber bit allows, while the spiral flute geometry provides efficient chip evacuation. It installs in standard drill chucks and milling machine spindles that accept straight-shank tooling.

Key Features

• High speed steel construction for durability across ferrous and non-ferrous materials
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• Taper length body at 10 inches OAL provides extended reach beyond jobber-length geometry
• Flute-length-to-diameter ratio of 6xD supports efficient chip evacuation in deeper holes
• Straight shank at 0.8125 inches fits standard drill chucks and milling spindles without adapters
• Right-hand spiral flute, regular spiral type, no coolant-through requirement
• ANSI-standard Series R51 general-purpose grade

Compatibility

Designed for use in standard drill chucks and milling machine spindles accepting 0.8125-inch straight-shank tooling. Compatible material applications include alloy steel, aluminum, aluminum alloy, brass, bronze, carbon steel, cast iron, cermet, copper, graphite, hardened steel, high strength bronze, magnesium, magnesium alloy, malleable iron, nickel, nickel alloy, reinforced plastic materials, and stainless steel.

Installation Notes

Installation is performed by machinists or maintenance technicians using a drill press, milling machine, or hand-held drill with a chuck rated for 0.8125-inch straight-shank tooling. Secure the shank fully in the chuck jaws before operation and verify concentricity to avoid bit deflection. Power down and de-energize the machine before changing tooling. Follow applicable shop safety procedures and machine-specific operating guidelines when selecting feeds and speeds for the target material.