Cleveland C04519 Screw Machine Drill Bit Letter H Hss

Product Description

The CLEVELAND C04519 is a screw machine length (stub length) twist drill bit sized to Letter H, which corresponds to 0.2660 inches in decimal. Built from high-speed steel with a bright, uncoated finish, it features a 118-degree standard point angle and web-thinned geometry that reduces thrust and helps center the bit at entry. The two-flute, right-hand spiral design evacuates chips efficiently in short-hole applications. At 2-11/16 inches overall length, the short body provides added rigidity in drill presses, screw machines, and CNC turret setups where a standard-length bit would flex or chatter. General-purpose grade, ASME B94.11M compliant.

This bit is suited for drilling alloy steel and aluminum in production and maintenance environments. The screw machine length format is the preferred choice when drilling shallow holes in tight fixtures or when workpiece clearance limits tool overhang. Machinists, tool-and-die technicians, and maintenance mechanics reach for this format in both manual drill press and automated screw machine operations. The straight cylindrical shank seats in standard drill chucks and collet holders without modification.

Key Features

• Letter H size — 0.2660 inches decimal equivalent, tolerance +0.0000 to -0.0010 inches
• 118-degree standard point angle with web-thinned tip for reduced entry thrust
• High-speed steel construction — bright, uncoated finish suitable for alloy steel and aluminum
• Screw machine (stub) length at 2-11/16 inches OAL for maximum rigidity in short-hole work
• 1-1/2 inch flute length, right-hand cut, regular spiral for consistent chip evacuation
• Straight cylindrical shank at 0.2660 inches diameter — fits standard drill chucks and collet holders
• Meets ASME B94.11M dimensional standard

Compatibility

Designed as a general-purpose screw machine length drill bit compatible with standard drill chucks and collet holders that accept a 0.2660-inch straight cylindrical shank, for use in drill presses, screw machines, and CNC turret applications.

Installation Notes

Install and remove drill bits only with the machine powered down and the spindle fully stopped. Secure the shank firmly in the chuck or collet to the full recommended grip depth before operation. Inspect the cutting edges and web before each use — a worn or chipped point will produce oversized holes and excessive heat. Use appropriate cutting fluid for alloy steel work to extend tool life and maintain hole tolerance.