Greenlee #3 Cobalt HSS Step Drill Bit - 12-Stage Professional Drilling System

Greenlee #3 Cobalt HSS Step Drill Bit - 12-Stage Professional Drilling System

High-Performance Cobalt Construction for Stainless Steel & Multi-Material Applications

The Greenlee #3 Cobalt HSS Step Drill Bit delivers professional-grade drilling performance with engineered cobalt high-speed steel construction for maximum durability in demanding stainless steel applications. This 12-stage step bit provides versatile drilling capabilities across multiple materials including mild steel, copper, brass, aluminum, fiberglass, plastic, wood, and laminates, making it an essential tool for electrical, HVAC, and general construction professionals.

Professional Features & Benefits

• Cobalt HSS Construction: Engineered with cobalt high-speed steel material for maximum tool life and superior performance in stainless steel up to 10 gauge thickness.
• 12-Stage Design: Multiple drilling stages provide precise hole sizing options and eliminate the need for multiple individual drill bits.
• Multi-Material Capability: Cuts through mild steel, copper, brass, aluminum, fiberglass, plastic, wood, and laminates for versatile job site applications.
• Stainless Steel Rated: Specifically engineered for drilling stainless steel materials up to 10 gauge, delivering clean, precise holes without material distortion.
• Professional Grade Quality: Greenlee manufacturing standards ensure consistent performance and reliability in demanding professional environments.
• USA Manufacturing: Manufactured in the United States with quality materials and precision engineering for long-lasting durability.

Technical Specifications

• Country Of Origin: United States
• Number Of Drill Stages: 12
• Product Type: Cobalt Step Bit

Installation & Operation

1. Mount the step bit securely in a compatible drill or driver with appropriate chuck capacity and torque settings.
2. Mark the desired hole location and ensure the work surface is properly secured and supported.
3. Begin drilling at low speed to establish the pilot hole, then gradually increase speed as appropriate for the material.
4. Apply steady, consistent pressure while allowing the stepped design to progressively enlarge the hole to the desired diameter.
5. Clear debris periodically during drilling to maintain cutting efficiency and prevent overheating.
6. Complete the hole to the required stage marking and verify final diameter before removing the bit.

Professional Applications

• Electrical panel and enclosure installations requiring precise hole sizing
• HVAC ductwork and equipment mounting applications
• Stainless steel fabrication and food service equipment installation
• Industrial maintenance and repair operations
• Commercial construction and renovation projects
• Automotive and transportation industry applications
• General metalworking and fabrication shops

Why Choose Greenlee Quality?

Greenlee delivers professional-grade tools engineered for the demands of electrical, telecommunications, and construction professionals. This cobalt step bit represents decades of manufacturing expertise with USA-made quality construction, ensuring reliable performance and extended tool life in the most challenging drilling applications across multiple material types.