Precision Twist Drill 022021 Hss Drill Bit 21/64 in 6 Pack

Product Description

The PRECISION TWIST DRILL 022021 is a pack of six high-speed steel (HSS) twist drill bits ground to a 135-degree split point angle. The split point geometry reduces walking on contact, allowing the bit to engage the workpiece immediately without a center punch on most materials. Finished in a purple bronze oxide coating, these bits are sized at 21/64 inch and suit production drilling applications where consistent hole quality and bit longevity matter. Machinists, pipefitters, electricians, and HVAC fabricators reaching for a reliable jobber-length HSS bit will find this pack a direct fit for standard drill chucks and magnetic drill presses.

These bits are suited for repetitive drilling in steel plate, structural iron, copper tubing headers, and similar ferrous and non-ferrous materials encountered in mechanical, plumbing, and electrical trade work. The HX10 style designation indicates a hex shank configuration, which seats securely in quick-change chuck systems and reduces bit slippage under torque. Selling in a six-piece pack, the 022021 is practical for shop stock or service van replenishment where a 21/64-inch diameter is called out frequently.

Key Features

• 135-degree split point tip reduces walking and eliminates the need for center punching on most surfaces
• High-speed steel (HSS) construction maintains hardness and edge retention through repeated drilling cycles
• Purple bronze oxide finish provides mild lubricity and corrosion resistance during storage
• HX10 hex shank design locks into quick-change and impact-rated chuck systems
• Jobber-length body suits standard drill presses, cordless drills, and magnetic drills
• Six bits per pack supports shop inventory and reduces downtime from bit wear

Compatibility

Designed as a jobber-length replacement drill bit for use with any standard 3/8-inch or larger keyed, keyless, or hex quick-change drill chuck accepting a 21/64-inch hex shank bit.

Installation Notes

Drill bit installation and use should follow applicable shop safety practices and OSHA general industry standards for rotating tool operation. Ensure the drill chuck is fully tightened and the workpiece is clamped securely before starting. De-energize or unplug the drill before changing bits. Do not exceed the rated RPM for the bit diameter and material being drilled, and apply cutting fluid when drilling ferrous metals to extend bit life.

Technical Specifications

• Size: 21/64 inch
• Point Angle: 135 degrees split point
• Material: High Speed Steel (HSS)
• Shank Style: HX10 hex shank
• Finish: Purple bronze oxide
• Quantity per Pack: 6
• Weight: 1.11 pounds

Standard Information

• Brand: PRECISION TWIST DRILL
• Manufacturer Part Number: 022021