Chicago-latrobe 48210 Screw Machine Drill Bit 5/32 Hss

Product Description

The CHICAGO-LATROBE 48210 is a screw machine length drill bit designed for high-production drilling in ferrous metals and cast iron. Built from high speed steel with a coated finish, this bit measures 5/32 inch (0.1562 inches) in diameter and features a 135-degree split point that reduces walking and requires no center punch on flat surfaces. The web-thinned, parallel web configuration lowers thrust and promotes cleaner hole entry. At 2-1/16 inches overall length with a 1-inch flute, it fits standard drill chucks and is sized for close-quarter or machine-mounted applications where a jobber-length bit would be too long. Classified as heavy-duty in the Series 2159 lineup.

This bit is intended for use in drill presses, CNC machining centers, turret lathes, and screw machines where shorter overall length improves rigidity and reduces deflection. Primary workpiece materials include cast iron and steel, making it a practical choice for fabrication shops, machine shops, and maintenance operations. The right-hand spiral flute efficiently evacuates chips during through-hole and blind-hole drilling. Machinists, tool and die technicians, and industrial maintenance trades are the typical end users.

Key Features

• 135-degree split point reduces drill walking and lowers required feed pressure
• Web-thinned parallel web reduces axial thrust for cleaner starts
• High speed steel construction with coated finish for wear resistance
• Screw machine length (2-1/16 inches overall) provides added rigidity over jobber-length bits
• 2-flute regular spiral design for efficient chip evacuation in steel and cast iron
• Diameter tolerance held to +0.0000 to -0.0007 inches per NAS 907 specification

Compatibility

Designed for drilling cast iron and steel workpieces; fits any standard straight-shank drill chuck accepting a 5/32-inch diameter bit. Meets NAS 907 and ISO standards for screw machine length tooling.

Installation Notes

Secure the shank fully in the drill chuck and verify runout before beginning a cut. Power down and de-energize the machine before changing or inspecting bits. Use appropriate cutting fluid for steel applications to extend tool life and improve surface finish. Consult machine manufacturer feed and speed tables for HSS tooling when setting spindle RPM and feed rate.