Osg 8698400 Extra Length Drill Bit 4mm Solid Carbide

Product Description

The OSG 8698400 is a solid carbide extra length drill bit engineered for precision drilling in demanding metalworking and machining applications. Built to Series 6535 specifications, it features a 4 mm diameter, a 140-degree split point, and an EgiAs coating that reduces friction and extends tool life in high-speed operations. The flute-to-diameter ratio of 15xD gives this bit its extended reach, making it suitable for deep-hole drilling where standard-length bits fall short. Coolant-through capability supports chip evacuation and thermal management at depth. This bit is installed by machinists and tool-and-die professionals in CNC machining centers and precision drilling applications.

The 8698400 is designed for right-hand cutting in ferrous and non-ferrous materials where extended reach and tight tolerances are required. Its X-thinned web reduces thrust force at the cutting edge, improving entry performance in harder materials. The straight-cylindrical shank provides consistent grip in standard drill chucks and collet systems. With a 75 mm flute length and 125 mm overall length, this bit is well suited for deep-hole work in production and job-shop environments where standard drill lengths are insufficient.

Key Features

• 4 mm cutting diameter with straight-cylindrical shank of matching 4 mm shank diameter
• 140-degree point angle for reduced thrust and self-centering entry
• EgiAs coating for improved wear resistance and reduced friction
• Coolant-through design supports chip evacuation during deep-hole drilling
• X-thinned web lowers cutting resistance in harder workpiece materials
• 15xD flute-to-diameter ratio enables deep-hole drilling beyond standard bit reach

Compatibility

Designed as an OEM-style replacement and production drill bit for CNC machining centers, drill presses, and multi-spindle equipment accepting 4 mm straight-cylindrical shank tooling.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer guidelines. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Seat the straight-cylindrical shank fully in the collet or chuck and verify runout before initiating the drilling cycle. Activate coolant-through supply before engaging the workpiece to maintain chip evacuation and tool temperature at depth.