Greenlee 5/16-18NC Drill/Tap Bit with High Speed Steel Construction and Quick Change Hex Shank

Greenlee 5/16-18NC Drill/Tap Bit with High Speed Steel Construction and Quick Change Hex Shank

Professional Three-in-One Drilling, Tapping & Deburring Solution

The Greenlee 5/16-18NC Drill/Tap Bit delivers professional-grade performance for complete hole drilling, tapping and deburring operations in a single step. Constructed from hardened high-speed steel with a 1/4 inch quick change hex shank, this bit provides reliable threading capability for materials up to 10-gauge thickness including mild steel, copper, brass, and aluminum.

Professional Features & Benefits

• High Speed Steel Construction: Hardened high-speed steel material provides superior durability and longer service life compared to carbon steel alternatives.
• Three-in-One Operation: Complete hole drilling, tapping and deburring/countersinking in one operation saves significant labor time and increases productivity.
• Back Tapered Design: Back tapered beyond tap top prevents thread damage from over-drilling, ensuring clean, precise threads every time.
• Quick Change Hex Shank: 1/4 inch hex shank design ensures strong connection to drill chuck and allows rapid bit changes for improved workflow efficiency.
• Split Point with Web Thinning: Advanced point geometry provides accurate starting and efficient drilling performance across multiple material types.
• 10-Gauge Material Capacity: Designed to tap materials up to 10-gauge thickness, handling a wide range of professional applications.
• Integrated Deburring: Built-in deburr/countersink feature beyond back taper eliminates secondary operations for complete hole finishing.

Technical Specifications

• Material Thickness: Up to 10 GA
• Material Type: Mild Steel, Copper, Brass, Aluminum
• Point Type: Split Point With Web Thinning
• Product Material: High Speed Steel
• Product Size: 5/6 IN
• Shank: 1/4 IN Quick Change Hex
• Thread Per Inch: 18 TPI
• Thread Type: NC

Installation & Operation

1. Select appropriate drill speed for material type and thickness being processed.
2. Insert the quick change hex shank securely into drill chuck, ensuring proper engagement.
3. Position drill perpendicular to work surface and begin drilling at moderate speed with steady pressure.
4. Continue operation through complete drilling, tapping and deburring cycle without stopping.
5. Withdraw bit slowly while maintaining steady rotation to prevent thread damage.
6. Inspect finished hole for proper thread formation and clean edges before proceeding with assembly.

Professional Applications

• Electrical panel and enclosure fabrication requiring threaded mounting holes
• HVAC ductwork and equipment installation with secure fastening requirements
• Metal fabrication shops processing mild steel, copper, brass and aluminum components
• Maintenance and repair operations requiring quick, reliable threading solutions
• Industrial assembly lines where efficiency and consistency are critical
• Commercial construction projects involving metal framework and mounting systems

Why Choose Greenlee Quality?

Greenlee delivers professional-grade tools engineered for demanding applications. The high-speed steel construction and precision manufacturing ensure reliable performance and extended service life, while the innovative three-in-one design maximizes productivity and reduces tool inventory requirements for professional tradespeople.