Cleveland C04428 1/8 in Hss Screw Machine Drill Bit

Product Description

The CLEVELAND C04428 is a screw machine length (stub length) drill bit designed for high-volume drilling in metal fabrication, machine shop, and production environments. Built from high-speed steel with a bright/uncoated finish, it features a 118-degree standard point angle and a right-hand spiral flute configuration. At 1/8 inch (0.1250 inches) in diameter and 1-7/8 inches overall length, this short-length drill delivers improved rigidity and reduced deflection compared to jobber-length bits. The straight-cylindrical shank seats directly in standard drill chucks and collets without slippage. Licensed machinists, tool-and-die tradespeople, and production line operators are the primary installers.

The C04428 is suited for general-purpose drilling in alloy steel and aluminum workpieces. Its stub length and web-thinned geometry make it particularly effective in CNC machining centers, drill presses, and hand-held drilling operations where clearance is limited or hole-to-hole consistency is required. The Series 2120 designation places it in a standardized screw machine drill family built to ASME B94.11M tolerances, making it a reliable replacement within production tool inventories that specify ANSI-compliant tooling.

Key Features

• 1/8 inch (0.1250 inches) diameter with a tight tolerance of +0.0000 to -0.0005 inches for consistent hole sizing
• 118-degree standard point angle with web-thinned, parallel web geometry for reduced thrust and cleaner entry
• High-speed steel construction provides adequate heat resistance for general-purpose metal drilling
• Screw machine (stub) length at 1-7/8 inches OAL improves rigidity and minimizes bit deflection
• Right-hand cut with regular spiral, 2-flute design for efficient chip evacuation
• Bright/uncoated finish — no coating buildup to affect diameter tolerance in close-tolerance work

Compatibility

Designed as a general-purpose screw machine length drill bit for use in alloy steel and aluminum workpieces. Fits any drill chuck or collet accepting a 0.1250-inch straight-cylindrical shank. Conforms to ASME B94.11M and ANSI specification standards for screw machine length drills.

Installation Notes

Install in a properly sized drill chuck or collet and verify shank is fully seated before operation. Always power down the machine and lock out energy sources before changing or inspecting tooling. Use appropriate cutting fluid or coolant for the workpiece material to extend tool life, even though this bit does not have through-coolant capability. Inspect the cutting edges and web for wear or chipping before each use and replace immediately if damage is found.