#43 DRILL BIT - Irwin

The IRWIN #43 Drill Bit (Model HN81143) is engineered for professional technicians and mechanics requiring precise, reliable drilling in demanding environments. Constructed from M-2 High-Speed Steel, this jobber length drill bit delivers a superior combination of strength, heat resistance, and wear resistance, ensuring consistent performance across various materials. Its design focuses on accuracy, making it an essential tool for creating exact-sized holes.

Key Features

• Premium M-2 High-Speed Steel Construction: Provides exceptional durability and maintains a sharp cutting edge, even under rigorous use, for extended tool life.
• Precision #43 Wire Gauge Size: Drills an exact 0.0890-inch diameter hole, making it ideal for precision drilling and preparation for tapping applications.
• 118° Conventional Point: Ensures accurate starts and minimizes drill bit "walking" on the workpiece, contributing to cleaner, more precise holes.
• Bright Finish: The uncoated bright finish helps reduce friction and allows for efficient chip evacuation during drilling operations.
• Jobber Length with Straight Shank: Offers a versatile balance of reach and rigidity, compatible with standard drill chucks in portable drills and stationary drill presses.

Applications

This IRWIN #43 Drill Bit is designed for a broad range of professional applications, particularly where non-fractional sized holes and precision are critical. It is well-suited for automotive repair and maintenance, industrial fabrication, and general MRO (Maintenance, Repair, and Operations) tasks. Professionals can confidently use this bit for drilling into various materials, including mild steel, aluminum, brass, plastics, and wood. Its ability to drill exact-sized pilot holes also makes it perfect for subsequent tapping operations, ensuring strong, clean threads.

Specifications

• Manufacturer: Irwin
• Model Number: HN81143
• Material: M-2 High-Speed Steel (HSS)
• Drill Bit Size: #43 Wire Gauge (0.0890 in decimal equivalent)
• Overall Length: 2-1/4 inches (2.2500 in)
• Flute Length: 1-1/8 inches (1.1250 in)
• Shank Diameter: 0.0890 inches
• Point Angle: 118°
• Finish: Bright
• Number of Flutes: 4