Precision Twist Drill 5997219 Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5997219 is a taper length, high speed steel drill bit designed for heavy-duty drilling across a wide range of materials. It features a 0.5313 inch (17/32 inch) diameter, a 135-degree split-point tip for self-centering starts without a center punch, and a parabolic flute geometry that efficiently evacuates chips at a 6xD flute-to-diameter ratio. The bright, uncoated finish suits general-purpose applications where coating is not required. With an overall length of 8 inches and a flute length of 4-3/4 inches, this bit provides the reach needed for deeper bores in production and maintenance environments. It carries ANSI standards compliance and is rated for general-purpose, heavy-duty use.

This drill bit is suited for use in metalworking, fabrication, and maintenance applications across residential and commercial settings. The straight shank and standard 17/32 inch shank diameter make it compatible with most drill chucks and drill press setups. The parabolic flute design and web-thinned, tapered web configuration make it particularly effective when drilling into materials that generate significant chip load. Machinists, tool and die technicians, and maintenance professionals working in shops or in the field will find this bit appropriate for production runs and repair work alike.

Key Features

• 135-degree split point for self-centering starts, reducing walk on hard or curved surfaces
• Parabolic flute geometry with 6xD ratio for efficient chip evacuation in deep-hole drilling
• Web-thinned, tapered web configuration reduces thrust requirements on harder materials
• High speed steel construction rated for heavy-duty, general-purpose metalworking
• Bright/uncoated finish suitable for general-purpose use across a broad material range
• ANSI-compliant taper length design provides extended reach over jobber-length bits

Compatibility

The PRECISION TWIST DRILL 5997219 QC91P series is compatible with 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 workpieces.

Installation Notes

This bit is installed and operated by machinists and maintenance technicians using standard drill presses, CNC machines, or hand-held power drills equipped with an appropriately sized chuck. Secure the straight shank firmly in the chuck before use and verify that the workpiece is clamped or fixtured to prevent movement. Use appropriate cutting fluid or coolant for the specific material being drilled to extend tool life, noting that this bit does not have coolant-through capability. Inspect the cutting edges and web area before each use and replace the bit if chipping or excessive wear is detected.