Cleveland C14269 No 29 Cobalt Screw Machine Drill Bit

Product Description

The CLEVELAND C14269 is a screw machine length cobalt drill bit in No. 29 wire size, measuring 0.1360 inches in diameter with a 1-15/16 inch overall length. Built to M42 cobalt material grade, this bit is designed for heavy-duty drilling in tough materials including alloy steels and aluminum. The 135-degree split point and web-thinned parallel web configuration reduce walking and lower thrust during entry. A parabolic flute profile improves chip evacuation, making it well suited for production drilling environments where cycle times matter. Licensed machinists, toolroom technicians, and metalworking trades are the primary installers.

This bit is intended for screw machine and short-hole drilling applications in ferrous and non-ferrous materials. The straight-cylindrical shank at 0.1360 inches diameter seats directly into standard drill chucks and screw machine collets. The 15/16-inch flute length and 1-inch shank length are proportioned for the reduced-length stub format, which improves rigidity and reduces deflection in high-speed or repetitive drilling operations. Typical use cases include production shops, maintenance facilities, and job-site drilling in structural alloy, plate steel, and aluminum stock.

Key Features

• M42 cobalt construction provides heat resistance and edge retention when drilling hardened alloys
• 135-degree split point with web thinning reduces thrust and eliminates the need for a center punch on most surfaces
• Parabolic flute geometry improves chip flow and reduces clogging during deep-pass drilling
• Screw machine length format increases rigidity and reduces deflection compared to jobber-length bits
• Right-hand cut with straight-cylindrical shank fits standard drill chucks and screw machine collets
• Manufactured to ASME B94.11M and ANSI specification standards

Compatibility

Designed as a direct-fit screw machine length drill bit for use in standard drill chucks, CNC drill heads, and screw machine collets accepting a 0.1360-inch straight-cylindrical shank.

Installation Notes

Installation requires a compatible drill press, CNC machining center, or hand drill with a chuck rated for the 0.1360-inch shank diameter. Ensure the workpiece is firmly fixtured before drilling to prevent movement under cutting load. Use appropriate cutting fluid for alloy steel applications to extend edge life. Follow OSHA 29 CFR 1910.212 machine guarding requirements and the machine manufacturer's RPM recommendations for the material and bit diameter.