Century Drill Tool 75409 Inverted Cone Rotary File 1/2x7/8

Product Description

The CENTURY DRILL TOOL CO INC 75409 is an inverted cone rotary file designed for rasping and filing soft metals. The cutting head measures 1/2 inch in diameter by 7/8 inch in length and mounts on a 1/4-inch shank that fits standard drill chucks. The body is machined from special alloy steel that has been hardened and tempered for extended service life and improved durability. Precision-ground cutting edges resist clogging and loading during use, maintaining consistent material removal throughout the job. This file is suited for deburring, shaping, and smoothing soft metal workpieces in fabrication, plumbing, HVAC, and general trade applications.

The 75409 is used wherever a rotary file is needed for working soft metals such as aluminum, copper, brass, and similar materials. The inverted cone profile makes it well suited for enlarging holes, cleaning up inside edges, and shaping recesses or tapered seats. The 1/4-inch shank provides broad compatibility with handheld drills, drill presses, and flex-shaft tools. It is commonly used by HVAC technicians, plumbers, and pipefitters for fitting and finishing metal components during installation or repair work. Package quantity is 3 files per pack.

Key Features

• Inverted cone profile sized at 1/2 inch diameter by 7/8 inch length
• Special alloy steel construction, hardened and tempered for long service life
• Precision cutting edges resist clogging and loading under continuous use
• 1/4-inch shank fits standard drill chucks and flex-shaft tools
• Designed for rasping and filing soft metals including aluminum, copper, and brass
• Sold in a pack of 3 files

Compatibility

The 1/4-inch shank is compatible with standard drill chucks on handheld drills, drill presses, and rotary tools. Designed as a general-purpose rotary file for use in soft metal fabrication and finishing applications.

Installation Notes

Install the 1/4-inch shank securely into the drill chuck before operating. Disconnect power to the drill or tool before changing files. Use appropriate eye protection and secure the workpiece before applying the rotary file. Inspect the file for cracks or damage before each use and replace if cutting edges show signs of wear or breakage.