Precision Twist Drill 5996075 Cobalt Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5996075 is a cobalt screw machine length drill bit designed for high-performance drilling in hard and tough materials. Built to the M40CO series specification, it features a 135-degree split point that reduces walking and allows for faster penetration without a center punch. The straight-cylindrical shank seats securely in standard drill chucks. With a web-thinned, tapered web configuration and regular spiral flutes, this bit is engineered for rigidity and efficient chip evacuation in short-reach, high-feed applications. It meets ANSI standards and is rated for heavy-duty use.

This bit is suited for production drilling environments, machine shop work, and field maintenance tasks involving hard steels, stainless alloys, and other demanding workpiece materials. The screw machine length design provides a shorter, stiffer profile compared to jobber-length bits, making it the right choice where drill press or CNC spindle work calls for reduced deflection. Machinists, toolroom techs, and industrial maintenance professionals are the primary installers and users of this tool.

Key Features

• M40CO cobalt construction for drilling hard and abrasive materials
• 135-degree split point reduces thrust force and eliminates center-punch prep
• Screw machine length profile provides extra rigidity and reduced deflection
• Web-thinned, tapered web improves chip flow and reduces heat buildup
• Regular spiral flute with 2.5xD flute-to-diameter ratio for balanced chip evacuation
• Straight-cylindrical shank compatible with standard 3-jaw drill chucks and collets

Compatibility

Designed as an OEM-style replacement or direct-use screw machine drill bit for applications requiring a 17/64 inch cobalt bit with a straight-cylindrical shank, falling within the 0.2500 to 0.3000 inch drill bit size range.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with drilling operations. Secure the shank fully in the chuck or collet before operation and verify the workpiece is properly clamped or fixtured. Use appropriate cutting fluid for the workpiece material to manage heat and extend tool life. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point geometry is compromised.