Eagle Cutting Tool 1090-039-I Hss Drill Bit 39/64 in

Product Description

The EAGLE CUTTING TOOL 1090-039-I is a 39/64 inch high speed steel (HSS) screw machine (stub) drill bit with a 1/2 inch reduced shank. Screw machine length drill bits feature a shorter flute and overall length compared to jobber drills, which improves rigidity and reduces deflection in production drilling and tight-clearance applications. The HSS construction handles a wide range of metals, plastics, and wood-based materials. This bit is suited for machinists, tool-and-die workers, maintenance technicians, and fabricators who need a stout, accurate drill for repetitive hole-making tasks.

This drill bit is used in screw machine operations, CNC drilling, manual drill press work, and handheld drilling where a 1/2 inch chuck and a short, rigid bit geometry are required. The 39/64 inch diameter is common for producing clearance holes, counterbore pilots, and pre-tap holes in ferrous and non-ferrous metals. The 1/2 inch shank makes it compatible with standard 1/2 inch drill chucks found on bench presses, drill presses, and machining centers.

Key Features

• 39/64 inch cutting diameter for precision hole sizing in metal and general-purpose materials
• High speed steel construction provides heat resistance and extended tool life in metal drilling applications
• Screw machine (stub) length geometry increases rigidity and minimizes bit deflection
• 1/2 inch shank fits standard 1/2 inch drill chucks without a reducer
• Import-grade tooling suitable for production environments where cost-per-hole efficiency matters

Compatibility

Designed for use in any drill press, screw machine, or CNC spindle equipped with a 1/2 inch chuck or collet. Fits standard 1/2 inch drill press chucks and compatible toolholders across common machining setups.

Installation Notes

Installation and use should be performed by qualified machinists or trained technicians. Always power down and lock out the machine before securing or changing drill bits. Ensure the shank is fully seated and the chuck is tightened with the chuck key before operation. Use appropriate cutting fluid when drilling ferrous metals to extend tool life and maintain hole quality.

Technical Specifications

• Cutting Diameter: 39/64 inches
• Shank Diameter: 1/2 inch
• Drill Type: Screw Machine (Stub) Length
• Material: High Speed Steel (HSS)
• Weight: 0.69 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: 1090-039-I