Osg 8700850 Carbide Stub Drill Bit 8.50mm 140 Deg

Product Description

The OSG 8700850 is a solid carbide screw machine length drill bit designed for precision hole-making in demanding production and machining environments. Built to Series 6500 standards, it features an 8.50 mm cutting diameter, a 140-degree split point, and an EgiAs coating that reduces friction and extends tool life in ferrous and non-ferrous materials. The X-thinned web geometry improves penetration and chip evacuation. At 101 mm overall length with a 43 mm flute length, this stub-length bit delivers rigidity and accuracy in close-tolerance applications. Coolant-through capability supports high-speed drilling cycles where heat management is critical.

This drill bit is suited for CNC machining centers, drill presses, and multi-spindle setups in metalworking and fabrication shops. The straight cylindrical shank at 10.00 mm diameter seats securely in standard collets and chucks. The right-hand spiral flute configuration works with conventional rotation. It is appropriate for operators drilling in steel, alloy steel, cast iron, and similar materials where carbide tooling outperforms high-speed steel in terms of wear resistance and cycle time.

Key Features

• Solid carbide construction for superior hardness and wear resistance versus HSS
• EgiAs coating reduces friction and heat buildup during drilling cycles
• 140-degree split point improves self-centering and reduces thrust force
• X-thinned web for enhanced chip evacuation and improved feed penetration
• Coolant-through design supports high-throughput production drilling
• Stub (screw machine) length provides added rigidity in short-reach applications

Compatibility

Designed for use in standard collet chucks and drill holders accepting a 10.00 mm straight cylindrical shank, consistent with CNC and manual machine tool setups requiring stub-length carbide tooling in the 8.00 mm to 9.50 mm diameter range.

Installation Notes

Installation and tool changes should be performed with the machine powered down and fully stopped. Ensure the shank is clean and the collet or chuck is free of debris before seating the bit. A licensed machinist or qualified tool-room technician should verify runout with a dial indicator before production use. Follow the tool manufacturer and machine OEM guidelines for feed rate and spindle speed when using carbide tooling to avoid tip fracture.