Cleveland C15315 Cobalt Screw Machine Drill Bit No. 25

Product Description

The CLEVELAND C15315 is a cobalt screw machine length drill bit in the Series 2175N lineup, designed for high-performance drilling in tough materials. Built to wire gauge size No. 25 with a decimal diameter of 0.1495 inches, this bit features a 135-degree split point that reduces walking and decreases the pressure needed to start a hole. The parabolic flute geometry promotes efficient chip evacuation. An overall length of 2-1/16 inches and a straight-cylindrical shank make it compatible with standard drill chucks. Machinists, tool-and-die technicians, and metalworking professionals rely on this style for precision short-reach drilling applications.

This drill bit is suited for drilling into alloy steel and aluminum in production and repair environments where a short, rigid bit is preferred over standard jobber length. The screw machine length profile reduces deflection and increases rigidity in tight setups, CNC drill presses, and manual machine operations. The M42 cobalt material grade provides heat resistance, making it well suited for interrupted cuts and higher-feed applications in metal fabrication shops and maintenance facilities.

Key Features

• Wire size No. 25 with 0.1495-inch decimal diameter for precise hole sizing
• 135-degree split point reduces thrust and eliminates center-punch requirement on most metals
• M42 cobalt material grade delivers superior heat and wear resistance versus standard HSS
• Parabolic flute design promotes fast chip evacuation and reduces heat buildup
• Web-thinned, parallel web configuration maintains bit strength while lowering cutting resistance
• Screw machine length body increases rigidity and reduces deflection in close-clearance setups
• Meets ASME B94.11M and ANSI specification designation for dimensional consistency

Compatibility

Designed as an OEM-style screw machine length drill bit for use in standard straight-shank drill chucks and machine tool spindles accepting 0.1495-inch shank diameters. Primary workpiece materials listed by the manufacturer are alloy steel and aluminum.

Installation Notes

Installation and use of this bit should be performed by qualified machinists or metalworking professionals familiar with drilling speeds and feeds for cobalt tooling. Secure the shank fully in the chuck and verify runout before beginning a cut. Always use appropriate cutting fluid for the workpiece material to extend tool life and maintain hole tolerance. Follow applicable shop safety standards and machine guarding requirements during operation.