Import BDNA--20911-1 Mechanics Drill Bit 15/64 in Hss

Product Description

The IMPORT BDNA--20911-1 is a mechanics-length drill bit designed for general-purpose drilling in metal and ferrous materials. Built from high-speed steel with an oxide finish, this bit features a 135-degree split point that reduces walking on contact and requires no center punch on most surfaces. The straight-cylindrical shank provides secure chuck engagement in standard keyless or keyed drill chucks. At 3-3/8 inches overall length, the mechanics length format offers rigidity in tight-clearance applications where longer jobber bits would flex or chatter.

This drill bit is suited for use in metalworking, maintenance, and mechanical repair settings where drilling through carbon steel, cast iron, high alloy steel, high tensile strength alloy, stainless steel, and similar ferrous materials is required. The shorter mechanics-length body makes it a common choice for equipment repair technicians, pipefitters, and millwrights working in confined spaces around machinery frames, flanges, and structural members.

Key Features

• 135-degree split point reduces drill walking and lowers thrust required to start the hole
• High-speed steel construction handles heat generated when drilling hard ferrous materials
• Oxide coating provides corrosion resistance and mild lubricity during cutting
• Mechanics-length body at 3-3/8 inches overall increases rigidity compared to jobber-length bits
• Web-thinned parallel web reduces cutting resistance and improves chip evacuation
• Straight-cylindrical shank fits standard 3-jaw drill chucks without adapters

Compatibility

Designed as a general-purpose mechanics-length drill bit compatible with any standard drill chuck accepting a straight-cylindrical shank in the 15/64 inch diameter range.

Installation Notes

This bit is installed and used by machinists, maintenance mechanics, pipefitters, and general tradespeople. Secure the shank fully in the chuck and verify chuck key is removed or collar is locked before operation. Use cutting fluid or coolant when drilling stainless steel or high-alloy materials to extend bit life and manage heat buildup. Do not exceed the rated speed range for the bit diameter and workpiece material, and never force a dull bit — resharpen or replace before continued use.