Chicago-latrobe 50803 Screw Machine Drill Bit 3/32 Cobalt

Product Description

The CHICAGO-LATROBE 50803 is a screw machine length cobalt drill bit engineered for heavy-duty drilling in ferrous materials. At 3/32 inch (0.0938 inches) in diameter, this bit features a 135-degree split point for reduced walking and faster penetration on hard surfaces. The M42 cobalt construction provides heat resistance and edge retention when drilling cast iron and steel at high feed rates. A parallel web configuration with web thinning reduces axial thrust, making it well suited for production drilling environments where bit longevity and dimensional accuracy are critical. Licensed tradespeople and machinists in fabrication, HVAC equipment manufacturing, and mechanical contracting rely on this bit for repetitive small-diameter hole work.

The 50803 fits screw machine length drill applications where a shorter, more rigid body is preferred over jobber length. Its 3/4-inch flute length and 1-3/4-inch overall length keep deflection minimal in tight clearances or drill press fixtures. Primary workpiece materials are cast iron and steel, making it a go-to choice for mechanical, plumbing rough-in metalwork, and light industrial production setups. The straight-cylindrical shank seats securely in standard drill chucks and machine spindles without modification.

Key Features

• M42 cobalt construction for heat resistance and extended tool life in ferrous materials
• 135-degree split point reduces drill walking and lowers entry thrust on hard metals
• Web-thinned parallel web reduces axial cutting force during production drilling
• Screw machine length body (1-3/4 inches overall) provides rigidity and reduced deflection
• Right-hand spiral flute with regular helix evacuates chips efficiently on cast iron and steel
• Diameter tolerance held to +0.0000 to -0.0005 inches for precise hole sizing

Compatibility

Designed as a screw machine length replacement bit for standard straight-cylindrical chuck applications machining cast iron and steel. Compatible with drill presses, CNC turrets, and hand-held electric drills accepting a straight shank at 3/32 inch diameter. Meets ISO standards for cutting tool dimensions.

Installation Notes

Installation and use should be performed by qualified machinists or tradespeople familiar with metal-cutting drill bit procedures. Secure the straight-cylindrical shank fully in the chuck before operation and verify chuck key is removed prior to spindle engagement. Always wear appropriate eye protection and ensure the workpiece is clamped or fixtured before drilling. Cutting speeds and feeds should follow published cobalt drill bit guidelines for the specific workpiece material being drilled.