Cleveland C04426 Screw Machine Drill Bit Wire 31 Hss

Product Description

The CLEVELAND C04426 is a screw machine length (stub length) drill bit in wire gauge size 31, equivalent to 0.1200 inches in diameter. Manufactured from high-speed steel with a bright uncoated finish, it features a standard 118-degree split point and a straight cylindrical shank. The short flute geometry of screw machine length bits provides increased rigidity and reduced deflection compared to jobber-length drills, making this bit well suited for high-volume production drilling in a drill press, CNC turret, or screw machine setup. Two spiral flutes with a regular helix clear chips efficiently during through-hole and blind-hole operations.

This bit is intended for general-purpose drilling in alloy steels and aluminum in production and maintenance environments. The 1.875-inch overall length and 0.875-inch flute length make it a practical choice when working in confined fixtures or when shorter tool stick-out is required for precision. Machinists, tool-and-die technicians, and industrial maintenance mechanics commonly use wire gauge series bits like the C04426 when drilling smaller pilot holes, clearance holes, or tapped hole preparations per standard drill-tap charts.

Key Features

• Wire gauge size 31 — 0.1200 inch diameter with a tight tolerance of +0.0000 to -0.0005 inches
• High-speed steel construction for general-purpose performance across a range of workpiece materials
• 118-degree standard point angle with web-thinned geometry for improved centering and reduced thrust
• Screw machine (short) length at 1.875 inches OAL for maximum rigidity and minimal deflection
• Bright uncoated finish — compatible with cutting fluids and coolants suited to the workpiece material
• Right-hand cut with regular spiral flutes for consistent chip evacuation
• Meets ASME B94.11M standards for drill bit geometry and tolerances

Compatibility

Designed as a general-purpose screw machine length drill bit for use in drill presses, CNC turrets, screw machines, and hand-held power tools accepting straight cylindrical shanks. Primary workpiece materials include alloy steel and aluminum.

Installation Notes

Secure the shank fully in a drill chuck or collet and verify runout before production use. Always apply an appropriate cutting fluid or lubricant when drilling alloy steel to extend tool life and maintain hole tolerance. Inspect the cutting edges for wear or chipping before each use — a dull or chipped bit can cause oversized holes and increased thrust on the workpiece. Dispose of worn bits safely per shop protocol; do not attempt to resharpen without proper drill grinding equipment.