Osg 8608511 Screw Machine Drill Bit 0.201 in Wire 7 Xpm

Product Description

The OSG 8608511 is a screw machine length drill bit designed for high-performance drilling in ferrous and hard-to-machine materials. Built from XPM high-speed steel with a coated finish, it measures 0.201 inches (Wire Size 7, 5.11 mm) in diameter and runs a 130-degree drill point angle optimized for self-centering on tough workpieces. The stub-length body keeps deflection low and rigidity high in production environments. Two spiral flutes with an R-thinned, tapered web promote efficient chip evacuation while reducing thrust. Licensed machinists, tool-and-die technicians, and maintenance professionals working with steel, alloy steel, cast iron, or nickel alloys will find this bit suited to their daily production drilling needs.

The 8608511 belongs to OSG Series 1900 and is sized for applications where screw machine length bits are specified — short-run production, CNC machining centers, drill presses, and manual screw machine setups. The 3xD flute-to-diameter ratio supports controlled chip removal in blind and through-hole operations across ferrous metals and nickel alloys. Overall length is 70.00 mm (approximately 2.76 inches) with a 6.00 mm (approximately 0.236 inches) straight-cylindrical shank. This bit does not include coolant-through capability and is intended for use with external coolant or cutting fluid where required by the workpiece material.

Key Features

• XPM high-speed steel construction with coated finish for extended tool life in hard ferrous materials
• 130-degree drill point angle with standard point type for improved self-centering and reduced walking
• R-thinned, tapered web reduces axial thrust and improves penetration efficiency
• Two spiral flutes with 3xD ratio support consistent chip evacuation in production drilling
• Straight-cylindrical shank compatible with standard drill chucks and collet systems
• Diameter tolerance of +0 to -0.018 mm holds tight dimensional control for close-tolerance hole requirements

Compatibility

Designed for drilling in steel, alloy steel, cast iron, and nickel alloy workpieces. Compatible with any drill press, CNC machining center, or screw machine accepting a 6.00 mm straight-cylindrical shank. Part of OSG Series 1900 screw machine length drill bits sized in the 0.2000 to 0.2500 decimal inch range.

Installation Notes

Installation and tool changes should be performed by a qualified machinist or tooling technician with the machine powered off and all energy sources locked out per applicable OSHA lockout/tagout procedures. Secure the straight-cylindrical shank fully in the chuck or collet before operation and verify concentricity to minimize runout. Use appropriate cutting fluid or external coolant for the workpiece material, as this bit does not support coolant-through delivery. Inspect the cutting edges and web condition before each use and replace the bit if chipping or excessive wear is observed.