Import -20905-10 Mechanics Drill Bit 9/64 in Hss

Product Description

The IMPORT -20905-10 is a mechanics-length drill bit designed for general-purpose drilling in metal and ferrous materials. Built from high-speed steel (HSS) with an oxide finish, it measures 9/64 inch (0.1406 inch decimal) in diameter and features a 135-degree split point for self-centering starts without a center punch. The straight-cylindrical shank seats securely in standard drill chucks. At 2-5/8 inches overall length, this is a short, rigid bit suited for tight spaces and accurate hole location in production or maintenance work.

This bit is intended for right-hand cutting in a wide range of ferrous workpiece materials including carbon steel, cast iron, high alloy steel, high tensile strength alloy steel, and stainless steel. Mechanics-length bits are commonly used by machinists, maintenance technicians, pipefitters, and HVAC or plumbing contractors when drilling through sheet metal, structural steel, or pipe fittings. The shorter flute length and overall length compared to jobber-length bits reduce flex and improve hole accuracy in hand-held or drill-press applications.

Key Features

• 135-degree split point self-centers on contact, reducing walking and eliminating the need for a center punch on most surfaces
• Web-thinned construction reduces thrust force required and improves chip clearance
• High-speed steel construction handles the heat generated when drilling hard ferrous alloys
• Oxide finish provides mild corrosion resistance and reduces friction at the cutting edge
• Straight-cylindrical shank fits standard 3-jaw drill chucks without adapters
• Mechanics (stub) length provides added rigidity and control compared to jobber-length bits

Compatibility

Designed as a general-purpose replacement or supplemental mechanics-length drill bit compatible with any standard drill chuck accepting a straight-cylindrical shank; rated for use in carbon steel, cast iron, high alloy steel, high tensile strength alloy steel, and stainless steel workpieces.

Installation Notes

A licensed machinist, maintenance technician, or qualified tradesperson should select the appropriate drill speed (RPM) for the workpiece material and bit diameter before use. Secure the workpiece firmly before drilling to prevent rotation or movement. Use cutting fluid when drilling stainless steel or high-alloy materials to extend bit life and manage heat. Inspect the cutting edges for wear before each use and replace the bit if chipping or dulling is observed.