Value Collection 10-221 Threaded Shank Drill Bit No. 21

Product Description

The VALUE COLLECTION 10-221 is a No. 21 threaded shank drill bit designed for precision drilling applications in metal, wood, and composite materials. The threaded shank provides a secure, positive connection in compatible chuck systems, reducing slippage under load. Weighing 1 pound, this bit is built for repeated use in production and maintenance environments. It is suited for machinists, maintenance technicians, and trade professionals who require consistent hole sizing and reliable bit retention during drilling operations.

The 10-221 is appropriate for use in shop environments, on-site maintenance work, and light production drilling where a No. 21 diameter hole is required. A No. 21 bit is commonly used for tapping operations and close-tolerance hole work in metal fabrication and mechanical assembly. It fits standard threaded shank chuck systems found on bench-top and handheld drilling equipment.

Key Features

• Threaded shank design provides positive chuck engagement and reduces bit walkout
• No. 21 wire gauge size suits tapping and close-tolerance drilling applications
• Packaged individually for single-unit purchase and inventory control
• Weighs 1 pound for balanced handling during extended use

Compatibility

Designed for use with threaded shank chuck systems that accept wire gauge drill bit sizes. Verify chuck thread specification before installation.

Installation Notes

Installation should be performed by a qualified machinist or maintenance technician familiar with drilling equipment and safe bit-handling procedures. Secure the bit fully into the threaded chuck before beginning any drilling operation and verify the workpiece is clamped or fixtured. Power down the drill press or disconnect the tool from its power source before changing bits. Inspect the bit for wear or damage before each use and replace if cutting edges are dull or the shank shows signs of thread damage.