DRILL BIT #29 Stub Cobalt Threaded - Brown Aviation Tool

Specifications

• Model Number: 31136
• Manufacturer: Brown Aviation Tool
• Part Number: 31136
• Drill Size: #29 (0.1360 inches / 3.454 mm)
• Material: Premium Cobalt High-Speed Steel (HSS-Co)
• Design Type: Stub Length
• Shank Type: Threaded for secure tool holding
• Point Angle: 135-degree split point
• Flute Type: Spiral

Key Features

• Cobalt HSS Construction: Manufactured from high-grade cobalt alloyed high-speed steel, offering superior hardness and heat resistance. This material choice is ideal for drilling through tough and abrasive materials.
• Stub Length Design: The shorter flute and overall length enhance rigidity and minimize deflection, making it suitable for precise drilling in confined spaces and reducing breakage risk.
• #29 Drill Size: Specifically engineered to provide precise hole dimensions, often used for critical pilot holes or fastener clearance in aerospace and manufacturing applications.
• Threaded Shank: Features a robust threaded shank designed for secure attachment in specialized drill chucks or tap extensions. This design prevents slippage and ensures stable drilling performance.
• 135-Degree Split Point: The self-centering split point eliminates the need for a pilot hole, ensuring immediate and accurate penetration. It reduces drill walking and requires less thrust force during operation.

Applications

• Aerospace Manufacturing & Maintenance: Ideal for drilling precise holes in aircraft components, especially in high-strength alloys.
• Hard Material Drilling: Effectively drills through stainless steel, titanium, Inconel, and other tough, heat-resistant alloys where standard HSS bits fail.
• Precision Industrial Work: Suitable for applications demanding high accuracy and consistency, such as fixture building, jig fabrication, and mold making.
• Confined Space Operations: The stub length design allows for efficient drilling in areas with limited clearance.
• Pilot Holes: Creates perfectly sized pilot holes for tapping operations or fastening applications requiring exact dimensions.

Benefits

• Extended Tool Life: The cobalt HSS material withstands extreme heat and abrasion, significantly outlasting conventional drill bits and reducing tool replacement frequency.
• Enhanced Precision: The combination of a stub length, 135-degree split point, and #29 sizing ensures clean, accurate, and perfectly sized holes every time, minimizing rework.
• Superior Stability: The threaded shank provides a rock-solid grip in compatible tooling, eliminating bit slippage and improving drilling consistency and operator control.
• Increased Efficiency: Drills faster and with less effort in challenging materials, boosting productivity by reducing drilling time and the need for frequent bit changes.
• Reduced Breakage: The rigid, stub-length design minimizes flexing and vibration, greatly decreasing the likelihood of bit snapping, especially when working with hard materials.