Accupro 77713105 Screw Machine Drill Bit 9/32 in Carbide

Product Description

The ACCUPRO 77713105 is a screw machine length drill bit designed for high-performance metal cutting in demanding shop and production environments. Built from submicron-grade solid carbide and coated with AlTiN, it handles alloy steel, cast iron, and stainless steel without the heat failure common to HSS tooling. The 140-degree split point geometry reduces walking and cuts entry force, while the web-thinned, parallel-web configuration improves chip evacuation. At 9/32 inch (0.2812 inch) diameter with a 2.9921-inch overall length, this stub-length bit fits tight-clearance setups where standard-length drills cannot reach. Coolant-through design supports high-speed, deep-hole drilling cycles. Weighs 0.1 pounds.

This drill bit is suited for CNC machining centers, drill presses, and production drilling operations working in ferrous materials including alloy steel, cast iron, and stainless steel. The screw machine (stub) length format provides rigidity and reduces deflection in short-reach applications. The straight cylindrical shank fits standard drill chucks and collets without modification. It is a practical choice for tool-and-die shops, machine shops, and maintenance professionals running tight-tolerance work in hard metals.

Key Features

• Submicron-grade solid carbide construction for extended tool life in hard ferrous materials
• AlTiN coating provides oxidation resistance and thermal hardness at elevated cutting speeds
• 140-degree standard point with web thinning reduces thrust force and minimizes drill walk
• Coolant-through design supports through-spindle coolant for deep-hole and high-speed applications
• Straight cylindrical shank compatible with standard chucks and ER collet systems
• Drill bit diameter tolerance of +0.0000 to -0.0005 inch for consistent, close-tolerance hole production

Compatibility

Designed as an OEM-style screw machine length drill bit for use in CNC machining centers, drill presses, and manual machines equipped with standard straight-shank toolholders or collet chucks accepting an 8.00 mm (0.3150 inch) shank.

Installation Notes

Installation and operation should be performed by a qualified machinist familiar with carbide tooling. Ensure the machine spindle and toolholder are clean and free of runout before seating the shank, as carbide is brittle and sensitive to side loads caused by excessive runout. Power down and lock out the machine before changing tooling. Follow the machine manufacturer and tooling manufacturer feed and speed recommendations for the specific workpiece material to avoid premature chipping or breakage.