Osg HP245-4646 Jobber Drill Bit 0.4646 in Solid Carbide

Product Description

The OSG HP245-4646 is a jobber-length drill bit designed for precision hole-making in demanding industrial and machining applications. Built from solid carbide, this bit delivers the rigidity and heat resistance required when drilling hardened steels, cast iron, stainless, and other tough materials. The 140-degree split point geometry reduces walking at entry and lowers thrust force needed to start a hole. At 118.00 millimeters overall length with a 71.00-millimeter flute length, this bit fits standard jobber-length applications. It carries a WD1 coating for added surface hardness and wear resistance. Machinists and tool-and-die professionals are the primary users of this bit in CNC drilling centers and manual drill presses.

This drill bit is suited for production and job-shop environments where dimensional accuracy and tool life are priorities. The 12.00-millimeter shank diameter seats securely in standard collets and drill chucks. The 5xD flute-to-diameter ratio provides adequate chip evacuation in moderate-depth holes. Diameter tolerance of plus 0.0070 to plus 0.0250 millimeters meets typical close-tolerance fit requirements in metal fabrication and precision machining. It does not include coolant-through capability, so external coolant or cutting fluid application is recommended when drilling heat-sensitive or gummy materials.

Key Features

• Solid carbide construction for maximum rigidity and wear resistance in hard materials
• 140-degree point angle reduces drill walking and entry thrust requirements
• WD1 coating improves surface hardness and extends tool life
• R-Thinned web for reduced cutting forces at the chisel edge
• 5xD flute-to-diameter ratio supports chip evacuation in moderate hole depths
• Diameter tolerance of plus 0.0070 to plus 0.0250 mm for close-tolerance drilling

Compatibility

Designed as a jobber-length solid carbide drill bit for use in CNC machining centers, drill presses, and other rotating tool holders accepting a 12.00-millimeter straight shank, within the 0.4000 to 0.5000 decimal inch diameter range.

Installation Notes

Installation and use should be performed by a qualified machinist or tooling professional. Ensure the machine spindle is fully stopped and the tool holder is properly cleaned before seating the shank. Solid carbide bits are brittle compared to high-speed steel and should not be used in setups with excessive runout or lateral loading. External cutting fluid is recommended since this bit does not feature coolant-through passages.