Accupro 4500366 1/2 Inch Carbide Drill Bit 140 Degree

Product Description

The ACCUPRO 4500366 is a screw machine length drill bit designed for high-performance drilling in demanding metal fabrication and machining applications. Built from solid carbide and coated with TiAlN (titanium aluminum nitride), this bit handles elevated cutting temperatures and abrasive workpiece materials without sacrificing edge integrity. The 140-degree web-thinned point reduces thrust force on entry and improves centering accuracy. At 5.039 inches overall length with a 2.559-inch flute length, it fits standard screw machine and CNC drilling setups. Machinists, tool-and-die technicians, and production drillers working with stainless steel and similarly hard alloys are the primary users of this bit.

This bit is rated for stainless steels as its primary workpiece material, making it well suited for fabrication shops, aerospace component work, medical device manufacturing, and any production environment where work-hardening alloys are common. The coolant-through design supports high-pressure internal coolant delivery, allowing faster feed rates and extended tool life in deep-hole applications. The straight cylindrical shank accepts standard drill chucks and collet holders at 1/2 inch diameter, keeping setup straightforward in both manual and CNC machine tools.

Key Features

• Solid carbide construction for rigidity and heat resistance in hard-material drilling
• TiAlN coating extends tool life by reducing oxidation and friction at high cutting speeds
• 140-degree web-thinned (R-thinned) point improves self-centering and lowers entry thrust
• Coolant-through capability supports internal high-pressure coolant for deep-hole drilling
• Regular spiral flute geometry promotes consistent chip evacuation in stainless and ferrous alloys
• Straight cylindrical shank fits standard drill chucks and ER collet systems

Compatibility

Designed as an OEM-style replacement and direct-fit cutting tool for screw machine and CNC drilling applications requiring a 1/2 inch straight-shank drill bit with a 140-degree point angle.

Installation Notes

Installation and operation should be performed by qualified machinists or CNC operators familiar with cutting tool setup and machine safety procedures. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before loading or removing the bit from a chuck or collet holder. Verify that coolant-through passages are clear and that the machine's coolant system pressure is appropriate for the application before running. Follow the tooling manufacturer's recommended speeds and feeds for the workpiece material to avoid premature tool failure.