Import BDNA--20900-1 Mechanics Drill Bit 1/16 in Hss

Product Description

The IMPORT BDNA--20900-1 is a mechanics-length twist drill bit designed for precise, controlled drilling in metalworking applications. Manufactured from high-speed steel (HSS) with an oxide finish, it measures 1/16 inch in diameter with a 135-degree split point that reduces walking and requires no center punch on most work surfaces. The straight-cylindrical shank seats securely in standard drill chucks. At 1-7/8 inches overall length, this short mechanics-length geometry provides added rigidity and reduced deflection compared to jobber-length bits. Machinists, maintenance technicians, and trade professionals reaching into confined spaces or working on drill presses will find the compact profile practical for everyday metal drilling tasks.

This bit is intended for drilling carbon steel, cast iron, high alloy steel, high tensile strength alloys, and stainless steel. Its general-purpose rating makes it a standard production and maintenance floor item. The mechanics-length body suits applications where a jobber-length bit would flex or chatter, such as short-reach drilling on machine components, fixture work, or field repair tasks. A right-hand spiral flute with web-thinned parallel web geometry aids chip evacuation and reduces thrust load during drilling.

Key Features

• 135-degree split point reduces bit walking and lowers required feed pressure
• High-speed steel construction handles carbon steel, cast iron, stainless steel, and high alloy materials
• Mechanics length (1-7/8 inches OAL) delivers greater rigidity and less deflection than jobber-length bits
• Oxide coating provides mild lubricity and corrosion resistance during storage and use
• Web-thinned parallel web reduces cutting resistance and improves chip flow
• Straight-cylindrical shank fits standard 3-jaw drill chucks without adaptation

Compatibility

Designed as a general-purpose mechanics-length drill bit compatible with any standard drill chuck accepting a straight-cylindrical shank. Suitable for use in drill presses, hand drills, and milling machine spindles across metalworking and maintenance applications.

Installation Notes

This bit is installed and used by machinists, maintenance technicians, and trade professionals working with metal substrates. Secure the shank fully in the drill chuck before operation and verify chuck tightness to prevent slippage. When drilling stainless steel or high alloy materials, use appropriate cutting fluid to manage heat buildup and extend cutting edge life. Inspect the cutting edges before each use and replace if chipping or dulling is observed to maintain hole quality and avoid workpiece damage.