Osg 8670400 Screw Machine Drill Bit 0.1575 in Carbide

Product Description

The OSG 8670400 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding metal-cutting applications. It measures 0.1575 inches (4.00 mm) in diameter with a 140-degree split point and an overall length of approximately 2.60 inches (66.00 mm). The two-flute spiral design paired with R-thinned web geometry reduces thrust and improves chip evacuation. This bit is installed by machinists, tool and die technicians, and metalworking professionals in production and job-shop environments.

This drill bit is built for use in CNC machining centers, drill presses, and screw machines where compact stub-length tooling is required for precision hole-making. The screw machine length body provides added rigidity compared to jobber-length bits, making it well suited for tight-tolerance bores in steel, alloy steel, and cast iron workpieces. The straight cylindrical shank fits standard collet chucks and drill chucks sized for 4.00 mm shanks.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous metals
• 140-degree point angle with R-thinned web reduces entry thrust and improves centering
• Screw machine (stub) length body provides greater rigidity than jobber-length bits
• Two-flute regular spiral design promotes efficient chip removal
• Coated finish extends tool life in steel and alloy steel cutting
• Straight cylindrical shank with tapered web configuration for consistent runout

Compatibility

Designed for drilling steel, alloy steel, and cast iron workpieces; fits standard collet chucks and drill chucks accepting a 4.00 mm straight cylindrical shank.

Installation Notes

Installation and tool changes should be performed with the machine at a full stop and all power isolated. Solid carbide tooling is brittle and should be secured with proper collet torque using a calibrated torque wrench to avoid shank slippage or micro-fractures. Inspect the cutting edges and point geometry before each use; discard any bit showing chipping or heel wear. Follow the machine manufacturer guidelines and applicable shop safety codes when setting speeds and feeds for carbide tooling in ferrous materials.