Osg 655026412 Extra Length Carbide Drill Bit 0.2656 in

Product Description

The OSG 655026412 is a solid carbide extra length drill bit designed for deep-hole drilling in demanding industrial and trade applications. It measures 0.2656 inches in diameter with a 140-degree split point and an overall length of 280 millimeters (approximately 11.02 inches). The bit features an EgiAs coating for improved wear resistance and heat management, a straight-cylindrical shank measuring 0.3125 inches (5/16 inch) in diameter, and a flute-to-diameter ratio of 30xD. Coolant-through capability makes it well suited for high-production or deep-penetration drilling where chip evacuation and tool temperature are critical concerns.

This extra length drill bit is used in precision machining environments where standard-length bits cannot reach required depths. Typical applications include through-hole drilling in thick plate, deep-bore work in structural components, and production drilling in metalworking shops. The 230-millimeter flute length (approximately 9.06 inches) provides extended reach without sacrificing chip clearance. The right-hand cutting direction and two-flute geometry are standard for general-purpose deep drilling in ferrous and non-ferrous metals. It is part of OSG Series 6550.

Key Features

• Solid carbide construction for rigidity and wear resistance in deep-hole drilling
• EgiAs coating reduces friction and extends tool life in abrasive materials
• 140-degree drill point angle with X-thinned web for reduced thrust and cleaner entry
• Coolant-through design supports chip evacuation in deep or blind holes
• 30xD flute-to-diameter ratio enables deep-reach drilling beyond standard bit capability
• Straight-cylindrical shank at 0.3125 inches fits standard toolholders and chucks

Compatibility

Designed as an OSG Series 6550 extra length drill bit with a 0.3125-inch straight-cylindrical shank, compatible with standard drill chucks and collet holders accepting 5/16-inch shank tooling.

Installation Notes

Installation and use of this bit should be performed by qualified machinists or toolroom technicians. Ensure the spindle and workholding are fully secured before engaging the drill. When using coolant-through capability, confirm coolant pressure and flow rate are appropriate for the machine tool before operation. Inspect the cutting edges and coating condition before each use and replace the bit if chipping or wear is detected.