Osg 655043712 Extra Length Drill Bit 7/16 in Solid Carbide

Product Description

The OSG 655043712 is a solid carbide extra length drill bit designed for deep-hole drilling applications in demanding production environments. Built to Series 6550 specifications, it features a 7/16 inch (0.4375 inch) diameter, a 140-degree drill point angle, and an EgiAs coating finish that enhances wear resistance and lubricity at the cutting edge. The flute length measures approximately 13.78 inches (350 mm) and the overall length is approximately 15.75 inches (400 mm), making this bit suited for reaching depth-to-diameter ratios up to 30xD. Coolant-through capability supports chip evacuation and heat management during extended cuts. Right-hand cutting direction and X-thinned web geometry reduce entry thrust and improve penetration rates in ferrous and non-ferrous materials.

This drill bit is used in CNC machining centers, drill presses, and horizontal boring setups where standard-length tooling cannot reach required depths. Typical applications include deep-hole drilling in structural components, mold and die work, aerospace frame parts, and precision mechanical assemblies. The straight-cylindrical shank with a 7/16 inch diameter seats in standard collet chucks and drill holders without adapters. It is installed and operated by machinists, tool-and-die makers, and CNC programmers working in job shops or production facilities.

Key Features

• Solid carbide construction for rigidity and extended tool life in hard or abrasive materials
• EgiAs coating finish reduces friction and improves wear resistance at the cutting edge
• 140-degree drill point angle optimized for controlled entry and reduced walking on flat surfaces
• Coolant-through design supports chip evacuation and thermal management in deep-hole drilling
• X-thinned web geometry lowers thrust requirements and improves hole entry performance
• 30xD flute-to-diameter ratio enables deep reaches not possible with jobber or stub-length tooling

Compatibility

Designed as an OEM-style solid carbide deep-hole drill for use in standard 7/16 inch straight-shank collet chucks, shrink-fit holders, and hydraulic drill holders on CNC machining centers and drill presses.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the machine spindle and workpiece are fully stopped and the tool holder is clean and free of debris before seating the shank. Confirm coolant-through channels are clear and that the machine tool pressure matches the bit requirements before initiating a cut. Follow shop safety protocols and applicable OSHA machining guidelines when handling carbide tooling.