Accupro 4500307 Screw Machine Drill Bit 5/32 in Carbide

Product Description

The ACCUPRO 4500307 is a screw machine length drill bit designed for high-performance drilling in demanding industrial and trade applications. Built from solid carbide and coated with TiAlN (titanium aluminum nitride), this bit delivers the hardness and heat resistance needed for cutting through stainless steels and other tough workpiece materials. It features a 140-degree web-thinned point for improved centering and reduced thrust, a 2-flute regular spiral design for efficient chip evacuation, and an overall length of 3.386 inches. The straight cylindrical shank measures 0.2344 inches in diameter, and the flute length is 1.417 inches. Coolant-through capability supports high-speed, deep-hole drilling. This bit is installed by machinists, tool and die tradespeople, and maintenance technicians working with CNC or manual drilling equipment.

The 4500307 is engineered for drilling stainless steels as its primary workpiece material, making it well-suited for fabrication shops, maintenance facilities, and production environments where material hardness and heat buildup are consistent challenges. The screw machine length format provides a compact, rigid profile that reduces deflection in short-hole drilling operations. With a 3xD flute-to-diameter ratio, this bit falls within the ASSC140-TA-CL series and is dimensioned to the ISO specification designation, fitting standard tool holders and drill chucks that accept a 0.2344-inch straight shank.

Key Features

• Solid carbide construction with TiAlN coating for extended tool life in stainless steel and hard materials
• 140-degree web-thinned (R-Thinned) point for accurate self-centering and reduced entry force
• Coolant-through design supports high-speed drilling and chip flushing in deep-hole applications
• 2-flute regular spiral geometry promotes efficient chip evacuation
• Screw machine length profile provides rigidity and minimizes deflection
• Straight cylindrical shank fits standard drill chucks and tool holders

Compatibility

Designed for use in standard drill chucks and tool holders accepting a 0.2344-inch straight cylindrical shank. Optimized for drilling stainless steels; fits within the ASSC140-TA-CL series range of 0.1500 to 0.2000 decimal inch drill bit sizes.

Installation Notes

This bit is intended for installation by machinists or qualified maintenance technicians operating CNC or manual drilling equipment. Secure the shank fully in the chuck or tool holder before operation and verify runout is within acceptable limits. When using coolant-through capability, confirm the machine spindle and tooling support internal coolant delivery at the appropriate pressure. Inspect the cutting edges before each use and replace the bit if chipping or wear is visible to avoid workpiece damage or bit breakage.