Precision Twist Drill 5997225 Taper Length Drill Bit 19/64

Product Description

The PRECISION TWIST DRILL 5997225 is a taper length, straight-shank drill bit designed for heavy-duty drilling across a wide range of metals and alloys. Built from high speed steel with a bright/uncoated finish, it features a 135-degree split point that self-centers on contact, reducing walking and the need for a center punch. The parabolic flute geometry and web-thinned, tapered web construction promote fast chip evacuation during deep-hole drilling. At 19/64 inch (0.2969 inches) in diameter with a 4-inch flute length and 6-3/8-inch overall length, this bit handles taper-length applications where a standard jobber bit falls short. Licensed trade professionals and machinist-level technicians are the primary users.

This drill bit is suited for general-purpose metalworking in both shop and field environments. The parabolic flute design and split point make it effective in interrupted cuts and on curved surfaces. The QC91P series targets professionals who need reliable, repeatable hole quality in production or maintenance contexts. Material compatibility spans a broad spectrum including alloy steel, carbon steel, hardened steel, tempered steel, stainless steel, cast iron, malleable iron, aluminum, aluminum alloy, brass, bronze, copper, titanium, titanium alloy, magnesium, magnesium alloy, nickel, and graphite.

Key Features

• 135-degree split point for self-centering starts without a center punch
• Parabolic flute geometry accelerates chip clearance in deep-hole drilling
• Web-thinned tapered web reduces thrust requirements and extends tool life
• High speed steel construction handles a broad range of metals including hardened and stainless steels
• Taper length body provides extra reach beyond standard jobber length
• ANSI-standard straight shank fits standard drill chucks without adapters

Compatibility

Designed as an OEM-style replacement and direct fitment for applications requiring a 19/64 inch straight-shank taper length drill bit conforming to ANSI standards. Compatible material applications include alloy steel, aluminum, aluminum alloy, brass, bronze, carbon steel, cast iron, copper, graphite, hardened steel, magnesium, magnesium alloy, malleable iron, nickel, stainless steel, steel, tempered steel, titanium, and titanium alloy.

Installation Notes

This bit is installed by machinists, maintenance technicians, and trade professionals using standard drill chucks or compatible toolholding equipment. Ensure the drill press, hand drill, or CNC spindle is fully stopped and secured before changing bits. Verify chuck jaws are clean and that the straight shank is fully seated and tightened before operation. For coolant-sensitive setups, note that this bit does not support through-coolant delivery.