Osg 630050311 Screw Machine Drill Bit 0.5039 in Carbide

Product Description

The OSG 630050311 is a solid carbide screw machine length drill bit designed for high-performance drilling in ferrous materials. With a 0.5039-inch (12.80 mm) diameter and a 140-degree split point, it delivers precise entry and reduced thrust in demanding machining environments. The bit features a right-hand spiral flute with R-thinned web geometry, which improves chip evacuation and extends tool life during high-cycle production runs. A straight-cylindrical shank with a 14.00 mm diameter seats securely in standard drill chucks and toolholders. At 107.00 mm overall length and a 2xD flute-to-diameter ratio, this is a compact, rigid tool built for close-tolerance work in machine shop and automated drilling setups.

This drill bit is suited for production machining applications in job shops, manufacturing facilities, and CNC drilling operations. It performs in screw machine setups and short-hole drilling where rigidity and accuracy are critical. Primary workpiece materials include steel, alloy steel, and cast iron. The coated carbide construction supports higher surface speeds compared to high-speed steel alternatives, making it appropriate for shops running higher feed rates or working with harder ferrous stock. A licensed machinist or CNC programmer typically selects and installs this bit as part of a tooling program.

Key Features

• Solid carbide construction with applied coating for extended wear resistance
• 140-degree drill point angle reduces thrust and improves self-centering on entry
• R-thinned, tapered web configuration improves chip flow and reduces heat buildup
• Right-hand cut with regular spiral flute geometry for consistent chip evacuation
• Straight-cylindrical shank at 14.00 mm diameter for secure chuck engagement
• Diameter tolerance of +0 to -0.027 mm supports close-tolerance hole sizing

Compatibility

Designed for use in steel, alloy steel, and cast iron workpieces. Falls within the OSG Series 6300 product line and fits within the 0.5000 to 0.6000 decimal inch drill bit size range. Compatible with standard straight-shank drill chucks and toolholders accepting a 14.00 mm shank diameter.

Installation Notes

Installation and tool changes should be performed with the machine fully de-energized and any CNC program halted. Secure the shank fully in the toolholder to the recommended grip depth before torquing the chuck or collet. Verify spindle speed and feed rate settings against the tool manufacturer's recommendations for the specific workpiece material before running. Inspect the cutting edges for chipping or wear at regular intervals, as carbide tooling can fail suddenly under improper cutting conditions.