Chicago-latrobe 48240 Screw Machine Drill Bit 0.272 in

Product Description

The CHICAGO-LATROBE 48240 is a screw machine length drill bit designed for high-production drilling in cast iron and steel. Built from high speed steel (HSS) with a coated finish, it features a 135-degree split point that reduces walking and lowers thrust when starting a hole. The stub-length body keeps the bit rigid under load, which is critical in screw machine and CNC lathe applications. With a straight cylindrical shank and web-thinned parallel web, this bit handles heavy-duty removal rates without the deflection common in longer general-purpose drills. It carries a 0.272 inch diameter and meets NAS 907 and ISO standards.

This drill bit is suited for metalworking trades including machinists, tool and die technicians, and maintenance mechanics working on steel and cast iron components. The screw machine length format is standard in turret lathes, CNC machining centers, and drill presses where short, rigid tooling is required to maintain tight tolerances. The two-flute spiral configuration provides efficient chip evacuation in ferrous materials, and the right-hand cut works with conventional machine spindle rotation. It is sold individually and performs well in both production and repair shop environments.

Key Features

• 135-degree split point reduces thrust and prevents bit walking on entry
• Web-thinned parallel web improves cutting efficiency and lowers feed force
• Screw machine (stub) length provides extra rigidity for tight-tolerance drilling
• High speed steel construction with coated finish for extended tool life in ferrous materials
• Right-hand spiral flute design for standard machine spindle rotation
• Meets NAS 907 and ISO standards for dimensional and performance consistency

Compatibility

Designed for drilling cast iron and steel workpieces; fits any machine spindle or drill press chuck that accepts a straight cylindrical shank in the 0.272 inch diameter range. Series 2159 by CHICAGO-LATROBE.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance mechanics familiar with rotating cutting tools. Secure the shank firmly in the chuck and verify runout before cutting. Always wear appropriate eye protection and follow machine guarding requirements per applicable shop safety standards. Do not exceed the recommended feed and speed ratings for the workpiece material and machine type.