Eagle Cutting Tool 1090-051-I Hss Drill Bit 51/64 in

Product Description

The EAGLE CUTTING TOOL 1090-051-I is a 51/64-inch high speed steel (HSS) screw machine (stub) length drill bit with a 1/2-inch reduced shank. Screw machine length drill bits are shorter than jobber-length bits, providing greater rigidity and reduced deflection in production drilling and tight-clearance applications. The 1/2-inch shank allows this fractional-size bit to seat in standard 1/2-inch drill chucks and CNC tool holders without an adapter. HSS construction handles a wide range of workpiece materials including mild steel, aluminum, brass, and thermoplastics.

This drill bit is suited for machine shop, maintenance, and production environments where a stub-length bit is preferred for rigidity. Common applications include through-hole and blind-hole drilling on drill presses, lathes, and CNC machining centers. The 51/64-inch diameter is frequently used when a hole requires light finish reaming or close-tolerance sizing. The imported designation indicates this is a value-grade option appropriate for general-purpose production runs and high-consumption tooling inventories.

Key Features

• 51/64-inch cutting diameter in a stub screw machine length profile for added rigidity
• 1/2-inch reduced shank fits standard drill chucks and CNC holders without adapters
• High speed steel construction provides adequate hardness and heat resistance for general-purpose drilling
• Shorter flute length reduces vibration and deflection compared to jobber-length bits
• Minimum order quantity of 1 — available as a single unit

Compatibility

Designed as a general-purpose screw machine drill bit compatible with any drill press, lathe tailstock, or CNC machining center equipped with a 1/2-inch or larger drill chuck or collet system.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or maintenance technicians familiar with rotating cutting tools. Ensure the spindle is fully stopped and the machine is de-energized or at zero RPM before inserting or removing the bit from the chuck. Confirm the shank is fully seated and the chuck is properly tightened before initiating a cut. Always follow applicable shop safety standards and wear appropriate PPE including eye protection when operating drilling equipment.

Technical Specifications

• Cutting Diameter: 51/64 inches
• Shank Diameter: 1/2 inches
• Drill Series: Screw Machine (Stub) Length
• Material: High Speed Steel (HSS)
• Weight: 0.69 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: 1090-051-I