Chicago-latrobe 48568 Screw Machine Drill Bit 1.0625 in Hss

Product Description

The CHICAGO-LATROBE 48568 is a screw machine length drill bit designed for general-purpose drilling in metalworking and fabrication applications. Built from high speed steel with a coated finish, it features a 1.0625-inch diameter, a 118-degree standard drill point angle, and a right-hand spiral flute configuration. The straight-cylindrical shank seats securely in standard drill chucks. At 6.25 inches overall length with a 4-inch flute length, this stub-style bit is shorter and stiffer than jobber-length equivalents, reducing deflection and improving hole accuracy in production setups. It carries an ISO standard designation and is part of the Series 157 line.

This drill bit is suited for use on ferrous and non-ferrous metals including cast iron, steel, and non-ferrous alloys. It is commonly used in manual drill presses, CNC machining centers, and production turret lathes where screw machine length bits are specified to minimize runout and chatter. The 2-flute spiral design provides efficient chip evacuation at standard drilling feeds and speeds. General-purpose grade makes it appropriate for a wide range of shop and field metalworking tasks. Coolant-through capability is not supported by this bit.

Key Features

• 1.0625-inch diameter with a tight tolerance of +0.0000 to -0.0015 inches for accurate hole sizing
• 118-degree standard drill point angle suited for steel, cast iron, and non-ferrous metals
• Screw machine (stub) length at 6.25 inches overall reduces deflection versus jobber-length bits
• High speed steel construction with coated finish for wear resistance
• 2-flute regular spiral design promotes consistent chip clearing
• Straight-cylindrical shank compatible with standard drill chucks and toolholders

Compatibility

Designed as an OEM-style general-purpose replacement or production drill bit for use in standard drill chucks and toolholding systems accepting straight-cylindrical shanks at 1.0625-inch diameter. Primary workpiece materials include cast iron, non-ferrous metal, and steel per manufacturer specification.

Installation Notes

Installation and use should be performed by qualified machinists or metalworking tradespeople. Always power down and lock out the machine before changing or securing the bit in the chuck. Verify chuck jaws are fully tightened and the shank is fully seated before operation. Consult your machine manufacturer guidelines for appropriate spindle speed and feed rate for the workpiece material and bit diameter.