Osg 3330350 Screw Machine Drill Bit 3.50 Mm Carbide

Product Description

The OSG 3330350 is a screw machine length drill bit designed for high-performance drilling in steel, alloy steel, and cast iron. Built from solid carbide and finished with an EgiAs coating, it delivers superior wear resistance and heat management in demanding production environments. The bit features a 180-degree web-thinned point that reduces thrust force and improves centering accuracy at entry. With a 3.50 mm diameter, a 55 mm overall length, and a 16 mm flute length, this stub-length drill is suited for CNC machining centers, drill presses, and screw machines where rigidity and precision matter most. It is sold as a single-piece unit.

This drill bit is intended for production machining applications where tight tolerances and consistent hole quality are required. The straight-cylindrical shank with a 6 mm diameter allows direct chuck mounting without adapters on standard tooling. The 2xD flute-to-diameter ratio and regular spiral flute geometry support efficient chip evacuation in short-depth holes through steel and cast iron workpieces. Machinists and tool-and-die professionals working in job shops, production facilities, or maintenance operations will find this bit fits standard screw machine and CNC setups.

Key Features

• Solid carbide construction for extended tool life in ferrous materials
• EgiAs coating improves surface hardness and reduces friction during cutting
• 180-degree web-thinned point reduces entry thrust and improves hole location
• Screw machine (stub) length provides added rigidity over jobber-length bits
• Regular spiral flute with tapered web configuration supports consistent chip flow
• Straight-cylindrical shank fits standard drill chucks and collets without modification

Compatibility

The OSG 3330350 is rated for primary workpiece materials including steel, alloy steel, and cast iron. It is part of OSG Series 5700 and falls within the 3.50 mm to 5.00 mm drill bit size range family.

Installation Notes

This bit should be installed and used by qualified machinists familiar with carbide tooling practices. Secure the shank fully in the chuck or collet to the recommended grip depth before running the spindle. Carbide is brittle — avoid side loading, interrupted cuts without proper feed control, or dropping the tool on hard surfaces. Always confirm spindle speed and feed rate are appropriate for the workpiece material and bit diameter before cutting.