Osg 8623300 Extra Length Cobalt Drill Bit 0.3937 in

Product Description

The OSG 8623300 is an extra length cobalt drill bit engineered for deep-hole drilling applications that exceed the reach of standard-length tooling. Built from cobalt high-speed steel in material grade M6K, this bit carries a WXL finish and features a spiral flute with a fast spiral type for efficient chip evacuation. The straight-cylindrical shank measures 0.3937 inches in diameter, matching the bit diameter for straightforward chuck mounting. A 120-degree standard point angle provides stable entry on a range of workpiece materials. Professional machinists and metalworking tradespeople install this bit in drill presses, CNC machining centers, and manual milling setups where extended reach is required.

The OSG 8623300 Series 1750 extra length drill bit is suited for production and maintenance machining environments where deep-hole drilling in metals is routine. The extended flute length of approximately 9.055 inches allows drilling operations that would otherwise require step drilling or specialized equipment. Right-hand cutting direction is standard for conventional drill press and machining center spindles. The R-thinned web and tapered web configuration reduce thrust force at the cutting tip, which is especially valuable during deep-hole entry into steel, stainless, and other ferrous alloys.

Key Features

• Cobalt M6K material grade for elevated heat and wear resistance in ferrous metals
• WXL finish reduces friction and extends tool life in high-performance drilling operations
• Fast spiral flute promotes aggressive chip evacuation in deep holes
• R-thinned, tapered web reduces cutting thrust and improves drill entry stability
• Extra overall length of approximately 11.811 inches reaches depths impossible with standard jobber bits
• Diameter tolerance held to +0.000 to -0.022 mm for precise hole sizing

Compatibility

Designed as an OEM-style replacement or direct tooling selection for applications requiring a 0.3937-inch (10 mm) diameter extra length drill bit with a straight-cylindrical shank compatible with standard drill chucks and collet systems.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Secure the straight-cylindrical shank fully in a drill chuck or collet rated for the spindle speed being used, and verify the bit runs true before engaging the workpiece. De-energize and lock out the machine before changing tooling per standard OSHA lockout/tagout procedures. Coolant-through is not supported on this bit, so apply external cutting fluid appropriate for the workpiece material to manage heat during deep-hole drilling cycles.