Precision Twist Drill 5997941 Taper Length Drill Bit 8mm

Product Description

The PRECISION TWIST DRILL 5997941 is an 8 mm taper length drill bit engineered for high-performance drilling across a wide range of metals and alloys. Built from high speed steel with a bright/uncoated finish, this bit features a 135-degree split point that reduces walking and minimizes the need for center punching. The parabolic flute geometry provides superior chip evacuation and allows faster feed rates compared to standard flute designs. With a flute length of 4-19/64 inches and an overall length of 6-1/2 inches, this bit is suited for deeper hole applications where a jobber-length bit falls short. It is installed and used by machinists, maintenance technicians, and metalworking professionals.

This drill bit is designed for taper length drilling applications in production and maintenance environments. The QC91PM series conforms to DIN 340 specifications and is rated for heavy-duty use. Its self-centering split point and web-thinned tapered web make it well suited for drilling into alloy steel, carbon steel, stainless steel, hardened steel, tempered steel, cast iron, malleable iron, aluminum, aluminum alloy, brass, bronze, copper, nickel, titanium, titanium alloy, magnesium, magnesium alloy, and graphite. The straight shank fits standard drill chucks without adapters.

Key Features

• 135-degree split point reduces bit walking and eliminates center punch requirement
• Parabolic flute design promotes rapid chip evacuation and supports higher feed rates
• Web-thinned tapered web lowers cutting resistance and improves hole entry performance
• High speed steel construction provides durability across a broad range of metal applications
• DIN 340 taper length standard allows access to deeper holes than standard jobber bits
• Straight shank with 8 mm diameter fits conventional drill chucks directly

Compatibility

Designed as a DIN 340 taper length replacement suitable for any standard drill press, CNC drilling center, or hand drill with a chuck that accepts an 8 mm straight shank. Compatible materials 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

Installation and use of this drill bit should be performed by qualified machinists or maintenance technicians familiar with drilling equipment and metal cutting operations. Always power down and lock out the drill press or machine spindle before mounting or changing bits. Secure the straight shank fully into the chuck and verify concentricity before beginning a cut. Use appropriate cutting fluid or coolant for the workpiece material to extend tool life, noting that this bit does not support coolant-through delivery.