Import BDNA--20918-1 Mechanics Drill Bit 11/32 in Hss

Product Description

The IMPORT BDNA--20918-1 is a mechanics-length drill bit designed for drilling into ferrous and high-strength metals in production and maintenance environments. It measures 11/32 inch (0.3438 inch decimal) in diameter with a 4-1/8 inch overall length and a 2-5/8 inch flute length. The 135-degree split point geometry reduces walking on contact and requires no center punch on most surfaces. Constructed from high-speed steel with an oxide finish, this bit handles demanding materials including carbon steel, cast iron, stainless steel, and high tensile strength alloys. The Weldon flat shank with three flats prevents slippage in compatible chuck holders.

This bit is suited for general-purpose drilling in fabrication shops, machine maintenance, and trade service applications where shorter, stiffer mechanics-length tooling is preferred over jobber-length bits. The right-hand spiral flute and regular helix angle make it a practical choice for hand-held drills and drill presses. It is appropriate for use on carbon steel, cast iron, high alloy steel, high tensile strength alloy, stainless steel, and structural steel workpieces.

Key Features

• 135-degree split point reduces bit walking and improves hole entry accuracy
• High-speed steel construction handles ferrous metals including stainless and high alloy steels
• Oxide coating provides basic corrosion resistance and mild lubricity
• Weldon flat shank with three flats prevents rotation in compatible tool holders
• Mechanics-length design offers increased rigidity compared to standard jobber-length bits
• Web-thinned parallel web reduces thrust force during cutting

Compatibility

Designed as a general-purpose replacement mechanics drill bit compatible with 3-flat Weldon shank drill chucks and holders accepting an 11/32 inch shank diameter.

Installation Notes

This bit is typically installed and used by machinists, maintenance technicians, and trade professionals operating drill presses or hand-held power drills. Ensure the drill chuck or holder is rated for a Weldon flat shank and is fully tightened before operation. Use appropriate cutting fluid when drilling stainless steel or high alloy steel to extend bit life and reduce heat buildup. Inspect the cutting edges for wear or chipping before each use and replace if the split point is damaged.