Osg 521012512 Carbide Jobber Drill Bit 1/8 Inch 140 Deg

Product Description

The OSG 521012512 is a solid carbide jobber length drill bit designed for high-performance drilling in demanding metalworking and machining applications. It measures 1/8 inch (3.18 mm) in diameter with an overall length of 86 mm and a flute length of 29 mm. The bit features a 140-degree drill point angle optimized for reduced thrust and self-centering entry. The WXL coating improves wear resistance and extends tool life across a range of workpiece materials. Coolant-through capability supports chip evacuation and thermal control during deep or high-feed drilling operations. This bit is sized and specified for use by machinists, tool-and-die professionals, and precision fabrication shops.

The OSG 521012512 is suited for drilling in ferrous metals (P-class steels), stainless and high-alloy steels (M-class), cast iron and non-ferrous materials (K-class), and heat-resistant superalloys (S-class). Its 5xD flute-to-diameter ratio provides suitable flute depth for standard jobber-length applications in CNC machining centers, drill presses, and manual mills. The straight-cylindrical shank fits standard drill chucks and collet holders without modification. This bit is a Series 5210 OSG tool intended for production and job-shop environments where consistent hole quality and tool life are priorities.

Key Features

• Solid carbide construction for rigidity and heat resistance in hard-material drilling
• WXL coating for extended wear life and reduced friction at the cutting edge
• 140-degree split point angle reduces walking and lowers entry thrust
• Coolant-through design supports chip evacuation and temperature control
• Right-hand spiral flute with regular helix for predictable chip flow
• Diameter tolerance of +0 to -0.018 mm for consistent hole sizing

Compatibility

The OSG 521012512 is rated for use in primary workpiece material classes P (carbon and alloy steels), M (stainless and tool steels), K (cast iron and non-ferrous), and S (heat-resistant superalloys) per OSG Series 5210 application data.

Installation Notes

Installation and use of carbide drill bits should be performed by qualified machinists familiar with feeds, speeds, and machine rigidity requirements for carbide tooling. Secure the straight-cylindrical shank fully in the chuck or collet before operation to prevent runout. Do not use carbide drill bits in hand-held drills — carbide is brittle and requires rigid machine setups to prevent fracture. Enable coolant flow before engaging the cut when using the coolant-through feature.