Chicago-latrobe 48207 Screw Machine Drill Bit 7/64 Hss

Product Description

The CHICAGO-LATROBE 48207 is a screw machine length drill bit designed for high-productivity drilling in cast iron and steel. Built from high speed steel with a coated finish, it measures 7/64 inch (0.1094 inches) in diameter and features a 135-degree split point that reduces walking on entry and cuts through hard materials with less thrust. The parallel web and web-thinned geometry support fast chip evacuation in short-hole applications. The straight-cylindrical shank seats directly in standard drill chucks without additional tooling. At 1-13/16 inches overall length, the screw machine format is engineered for production environments where clearance is limited and cycle time matters.

This bit is suited for short-hole drilling operations in metalworking, maintenance, and fabrication settings. The screw machine length format is common on drill presses, CNC machining centers, and hand-held power drills where a shorter flute and overall length improve rigidity and reduce deflection. Primary workpiece materials are cast iron and steel, making it a practical choice for HVAC equipment fabrication, electrical panel work, pipefitting, and general mechanical assembly. The two-flute regular spiral design clears chips efficiently in through-hole and blind-hole applications at production feed rates.

Key Features

• 135-degree split point reduces entry thrust and minimizes bit walking on hard metal surfaces
• Web-thinned, parallel web construction supports aggressive feed rates and efficient chip removal
• High speed steel construction with coated finish for extended tool life on steel and cast iron
• Screw machine length format improves rigidity and control in tight clearance or high-cycle applications
• Straight-cylindrical shank fits standard three-jaw drill chucks without adapters
• Diameter tolerance of +0.0000 to -0.0005 inches ensures consistent hole sizing to NAS 907 specification

Compatibility

Designed as an OEM-style replacement or direct-use screw machine drill bit for standard three-jaw drill chucks and collet systems accepting straight-cylindrical shanks in the 7/64 inch diameter range.

Installation Notes

Installation and use should be performed by a qualified machinist, maintenance technician, or trade professional familiar with metal drilling practices. Secure the shank fully in the chuck and verify runout before beginning a cut. Always wear appropriate eye protection and follow applicable shop safety procedures when operating rotary cutting tools. Do not exceed the feed and speed parameters appropriate for the workpiece material and machine setup.