Osg 215-0550 Screw Machine Drill Bit 0.055 in Carbide

Product Description

The OSG 215-0550 is a solid carbide screw machine length drill bit engineered for precision drilling in demanding trade and industrial applications. Sized at 0.055 inches (wire size 54, 1.40 mm) in diameter, it features a 135-degree split point with web thinning for fast, accurate starts without center-punching. The bright/uncoated finish suits general-purpose use across a wide range of workpiece materials. With a right-hand cut and slow-spiral flute configuration, this bit maintains control in short-hole and spot-drilling operations. Machinists, toolroom technicians, and precision fabricators rely on this type of tooling for tight-tolerance work.

The 215-0550 fits screw machine, drill press, and CNC drilling operations targeting steel, alloy steel, stainless steel, cast iron, aluminum silicate, nickel alloy, titanium, and titanium alloy workpieces. The straight-cylindrical shank seats securely in standard collets and chucks. The compact screw machine length profile - with a 0.5-inch flute length and 1.5-inch overall length - keeps deflection low in close-clearance setups. This is a general-purpose bit suited for production and maintenance environments alike.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• 135-degree standard split point with web thinning reduces thrust and improves hole entry accuracy
• Slow-spiral, 2-flute design promotes chip evacuation in short-hole drilling
• Bright/uncoated finish compatible with a wide range of cutting fluids and dry cutting
• Straight-cylindrical shank fits standard collets, drill chucks, and quick-change holders
• Diameter tolerance of plus 0 to minus 0.013 mm supports close-tolerance hole sizing

Compatibility

Designed for use in screw machines, CNC drilling centers, and drill presses accepting straight-cylindrical shank tooling in the 0.0000 to 0.1000 inch diameter range. Compatible with workpiece materials including steel, alloy steel, stainless steel, cast iron, aluminum silicate, nickel alloy, titanium, and titanium alloy per OSG Series 215 specifications.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom technicians familiar with small-diameter carbide tooling. Ensure the spindle and collet or chuck are clean and properly torqued before seating the shank to prevent runout. Carbide tooling is brittle - avoid side loads, interrupted cuts without adequate support, and dropping the bit on hard surfaces. Follow applicable shop safety standards and machine guarding requirements during operation.