Osg 631028011 Carbide Jobber Drill Bit 9/32 in

Product Description

The OSG 631028011 is a solid carbide jobber-length drill bit designed for high-performance drilling in ferrous metals and hard alloys. It carries a 9/32 inch (0.2811 inch decimal) diameter, a 140-degree R-thinned point for accurate self-centering entry, and an EgiAs coating that extends edge life in abrasive materials. The straight-cylindrical shank measures 5/16 inch in diameter, and the overall length is 91 mm (approximately 3.58 inches). This bit is built for production environments where tool longevity and hole accuracy in tough materials are the primary concerns. Licensed machinists, tool-and-die shops, and metalworking fabricators are the primary users.

This drill bit is well-suited for blind hole, cross hole, and through-hole drilling applications in steel, alloy steel, and cast iron. Its 5xD flute-by-diameter ratio and regular spiral flute geometry support efficient chip evacuation in these materials. The R-thinned web reduces thrust force at entry, making it practical for self-centering starts without a center punch in many setups. It is a Series 6310 tool from OSG, intended for use in CNC machining centers and manual drill presses with rigid setups.

Key Features

• Solid carbide construction for rigidity and heat resistance in ferrous and hard-alloy drilling
• EgiAs coating extends cutting-edge life in abrasive and high-strength workpiece materials
• 140-degree R-thinned point promotes self-centering entry and reduces walking
• Tapered web with R-thinning lowers axial thrust requirements
• Regular spiral flute with 53 mm flute length supports chip evacuation in deep cuts
• Diameter tolerance of +0 to -0.022 mm for consistent hole sizing

Compatibility

Designed for drilling steel, alloy steel, and cast iron workpieces. Suitable for blind hole, cross hole, general drilling, and self-centering applications. Fits any chuck or collet accepting a 5/16-inch straight-cylindrical shank. Coolant-through is not supported on this model.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Secure the shank fully in a properly sized collet or drill chuck before operation, and verify runout before cutting. Always power down the spindle completely before changing bits. Follow applicable shop safety standards and machine manufacturer guidelines for carbide tooling speeds and feeds.