Osg 520049912 Screw Machine Drill Bit 12.68mm Carbide

Product Description

The OSG 520049912 is a screw machine length drill bit engineered for high-performance hole-making in demanding metalworking and machining applications. Built from solid carbide and finished with a Cr (WXL proprietary) coating, this bit delivers exceptional wear resistance and thermal stability at elevated cutting speeds. The 140-degree point angle with an R-thinned point geometry reduces thrust force and improves centering accuracy on entry. At 5.0394 inches overall length with a 64 mm flute length, it fits standard screw machine and CNC drilling setups. Coolant-through capability supports chip evacuation and extended tool life in deep-hole and high-feed operations.

This drill bit is designed for use in screw machines, machining centers, and CNC lathes where stub-length rigidity is required. The straight shank and regular spiral flute configuration make it well suited for drilling medium-to-large diameter holes in ferrous and non-ferrous metals, stainless steels, and hardened alloys. It is part of the OSG Series 5200 line and is sized for applications requiring a 0.4500 to 0.5000 inch diameter range, with this bit ground to 12.68 mm (0.4992 inches). Machine operators, tool-and-die makers, and CNC machinists are the primary users of this tooling.

Key Features

• Solid carbide construction for high rigidity and wear resistance in hard materials
• 140-degree R-thinned point reduces entry thrust and improves hole accuracy
• Coolant-through design aids chip evacuation and heat management in deep drilling
• WXL proprietary Cr finish extends coating durability in abrasive cutting conditions
• Regular spiral flute with right-hand cut suits standard CNC and screw machine setups
• 3xD flute-to-diameter ratio balances chip clearance with stub-length stiffness

Compatibility

Designed as an OSG Series 5200 screw machine length drill bit for applications requiring a drill diameter in the 0.4500 to 0.5000 inch (11.00 to 13.50 mm) range, with a straight shank compatible with standard drill chucks and collet holders.

Installation Notes

Installation and use of this tooling should be performed by qualified machinists or CNC operators familiar with solid carbide tooling requirements. Ensure the spindle, chuck, or collet holder is clean and properly torqued before seating the shank. Activate coolant-through supply before engaging the cut to prevent thermal shock to the carbide substrate. Do not use this bit in hand-held drilling applications; it is intended for rigid machine-tool setups only.