Osg 61563 Screw Machine Drill Bit 0.248 Inch Hss

Product Description

The OSG 61563 is a screw machine length drill bit designed for high-performance drilling in metal fabrication and machining applications. Built from high speed steel with a coated finish, this bit measures 0.248 inches (6.30 mm) in diameter with a 120-degree faceted drill point and a tapered web configuration. Web thinning reduces thrust and improves chip evacuation at the point. With a straight-cylindrical shank and regular spiral fluting, the 61563 fits standard drill chucks and delivers controlled, repeatable cuts in production and job-shop environments. It is installed and used by machinists, tool-and-die technicians, and mechanical contractors working with drill presses, CNC machines, or hand-held drilling equipment.

This bit is suited for drilling steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate. Its screw machine length body — shorter than jobber length — provides increased rigidity and reduced deflection in tight setups or when working close to a fixture. The 5xD flute-to-diameter ratio supports chip clearance across moderate depth holes. The Series 1100 designation places it within OSG's high-performance catalog tier, intended for production environments where tool life and hole quality consistency are priorities.

Key Features

• 0.248 inch (6.30 mm) cutting diameter with tolerance of +0 to -0.022 mm
• 120-degree faceted drill point for accurate entry and reduced walking
• Tapered web with web thinning to lower thrust and improve chip flow
• Coated high speed steel construction for extended wear resistance
• Straight-cylindrical shank at 8.00 mm diameter for standard chuck compatibility
• Right-hand cut, regular spiral flute — suitable for steel, stainless, and aluminum workpieces

Compatibility

Designed as an OEM-style replacement and standard tooling option for screw machine length drill bit applications in the 0.2000 to 0.2500 inch (5.00 to 6.50 mm) diameter range. Compatible with workpiece materials including steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate as noted in OSG Series 1100 specifications.

Installation Notes

Install and remove this bit only with the drill press, CNC spindle, or hand drill fully powered down and secured. Verify chuck or collet shank clearance matches the 8.00 mm shank diameter before seating. This bit does not support coolant-through delivery — use external flood or mist coolant as required by the workpiece material and cutting speed. Follow applicable OSHA machine guarding requirements when operating drilling equipment.