Import 20821 Mechanics Drill Bit 0.159 in Hss Split Point

Product Description

The IMPORT 20821 is a mechanics-length, high-speed steel (HSS) twist drill bit designed for general-purpose hole drilling in metalworking applications. It features a 135-degree split point geometry with web thinning, which reduces walking on contact and lowers the thrust force needed to start a cut. The straight-cylindrical shank fits standard three-jaw drill chucks without modification. At 0.159 inches in diameter and 3.25 inches overall length, this bit is suited for production and maintenance drilling where clearance is limited and a jobber-length bit would be excessive.

This drill bit is intended for use in metal fabrication, mechanical maintenance, and industrial service environments. It performs well in carbon steel, cast iron, high alloy steel, high tensile strength alloy, stainless steel, and general steel workpieces. The mechanics length makes it a practical choice in confined spaces such as equipment frames, enclosures, and mechanical assemblies where a standard jobber-length bit cannot be used effectively. Licensed tradespeople and machine operators handling metal fabrication and repair work are the primary installers.

Key Features

• 135-degree split point reduces bit walking and lowers entry thrust on hard metals
• Web-thinned geometry improves chip clearance and cutting efficiency
• High-speed steel construction withstands heat generated during metal drilling
• Oxide finish provides moderate corrosion resistance and reduced friction
• Mechanics length (3.25 inches OAL) suited for confined-space drilling
• Right-hand spiral flutes with regular helix for consistent chip evacuation

Compatibility

Designed as a general-purpose mechanics-length drill bit compatible with standard three-jaw drill chucks accepting straight-cylindrical shanks, for use in drilling carbon steel, cast iron, high alloy steel, high tensile strength alloy, stainless steel, and general steel workpieces.

Installation Notes

Installation is performed by machinists, millwrights, HVAC technicians, and mechanical maintenance tradespeople using standard drill presses, handheld electric drills, or magnetic-base drills. Secure the workpiece fully before drilling to prevent movement. Use appropriate cutting fluid or coolant when drilling stainless or high-alloy steel to manage heat buildup, even though this bit does not support through-coolant delivery. Inspect the cutting edges for wear before each use and replace when the split point shows visible rounding or chipping.