Cleveland C14521 Screw Machine Drill Bit 1/16 in Cobalt

Product Description

The CLEVELAND C14521 is a cobalt screw machine length drill bit designed for high-performance drilling in tough materials. Built to ASME B94.11M and DIN 1897 standards, it features a 135-degree split point for fast penetration and reduced walking on entry. The 1/16 inch (0.0625 inch) diameter and compact 1-5/8 inch overall length make it well suited for short-reach drilling applications where a jobber-length bit would deflect or chatter. The M42 cobalt construction handles heat buildup during high-speed drilling in abrasive and hard workpiece materials. Licensed trades and machining professionals rely on this bit where precision entry and tight tolerances are required.

This bit is rated for drilling alloy steels and aluminum, making it a practical choice across HVAC fabrication shops, plumbing contractors cutting sheet metal, and general metalworking operations. The screw machine (stub) length reduces flex, which is especially useful in drill presses, CNC setups, and hand drilling in tight clearances. The right-hand cut and straight cylindrical shank allow direct chuck mounting with no adapter needed. Heavy-duty grade classification means it is built for repeated use rather than one-off applications.

Key Features

• 135-degree split point reduces thrust and minimizes drill walking on entry
• M42 cobalt tool material resists heat and wear in alloy steel and aluminum drilling
• Screw machine (stub) length at 1-5/8 inches overall reduces deflection in tight setups
• Web-thinned parallel web construction improves chip evacuation and cutting efficiency
• Straight cylindrical shank fits standard drill chucks without adapters
• Diameter tolerance held to +0.0000 to -0.0005 inches for precision fitment

Compatibility

Designed as an OEM-style replacement or direct-use screw machine drill bit compatible with standard straight-shank drill chucks in drill presses, hand drills, and CNC equipment where a 1/16 inch diameter stub-length bit is specified.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with rotating cutting tools. Secure the shank fully in the chuck and confirm the bit runs true before beginning the cut. Always wear appropriate eye protection and follow applicable shop safety procedures when operating drilling equipment. Inspect the cutting edges before each use and replace any bit showing chipping, heat discoloration, or excessive wear.