Precision Twist Drill 5997936 Taper Length Drill Bit 7mm

Product Description

The PRECISION TWIST DRILL 5997936 is a taper length, high speed steel drill bit in the QC91PM series, sized at 7 mm (0.2756 inches decimal equivalent). It features a 135-degree split point for self-centering entry without a center punch, and a parabolic flute geometry that promotes fast chip evacuation and reduced heat buildup during deep-hole drilling. The web-thinned, tapered web configuration lowers thrust requirements. This bit is built to heavy-duty grade performance standards and conforms to DIN 340 specifications, making it a reliable choice for production and maintenance drilling in metal fabrication, machining, and general industrial trades.

This drill bit is suited for through-hole and deep-hole drilling applications across a wide range of materials including alloy steel, carbon steel, stainless steel, hardened steel, tempered steel, cast iron, malleable iron, aluminum, aluminum alloy, brass, bronze, copper, magnesium, magnesium alloy, nickel, titanium, titanium alloy, and graphite. The taper length body gives it extra reach compared to a jobber-length bit, making it practical for stack drilling, angled entry work, and applications where standard-length bits fall short. It is commonly used by machinists, maintenance technicians, and metalworking professionals in shop and field environments.

Key Features

• 135-degree split point for self-centering start and reduced walking on entry
• Parabolic flute geometry promotes efficient chip evacuation in deep holes
• Web-thinned tapered web lowers drilling thrust and extends tool life
• High speed steel construction handles a broad range of ferrous and non-ferrous materials
• Bright/uncoated finish; no coating to delaminate during high-heat applications
• Conforms to DIN 340 standard for taper length drill geometry and tolerances
• Straight shank fits standard drill chucks and machine spindles without adapters

Compatibility

Designed as a DIN 340 taper length replacement or direct-use drill bit compatible with standard straight-shank drill chucks on benchtop drill presses, CNC machining centers, magnetic base drills, and hand-held power drills accepting a 7 mm (0.2756 inch) shank. No specific OEM model compatibility was stated in the product data.

Installation Notes

Installation and use of this bit should be performed by a qualified machinist or trained tradesperson familiar with metal cutting operations. Secure the shank fully in the chuck and verify runout before drilling. Power down and de-energize the machine before changing bits. Do not exceed the spindle speed rating appropriate for a 7 mm HSS bit in the material being drilled; consult standard cutting-speed charts for HSS in the target material.