Chicago-latrobe 48904 Screw Machine Drill Bit 0.0625 in

Product Description

The CHICAGO-LATROBE 48904 is a screw machine length drill bit designed for left-hand cutting in general-purpose drilling applications. Built from high speed steel with a bright, uncoated finish, it measures 0.0625 inches (1/16 inch) in diameter with an overall length of 1.625 inches and a flute length of 0.625 inches. The 118-degree standard point angle and web-thinned, parallel web construction promote clean entry and reduce thrust on entry. The straight-cylindrical shank seats securely in standard chucks. Licensed trade professionals and machinists rely on this Series 157L bit for precision work where a left-hand cutting direction is required.

This bit is suited for light-duty drilling in metals and non-metals including aluminum, copper, magnesium, slate, thermoplastic, and wood. The screw machine length format — shorter than jobber length — provides added rigidity and improved accuracy in drill press, turret lathe, and screw machine setups where minimal deflection matters. The two-spiral flutes evacuate chips efficiently even at small diameters, reducing the risk of bit walk or breakage in close-tolerance work.

Key Features

• Left-hand cutting direction for use in left-hand rotation spindles or stud extraction applications
• High speed steel construction provides durability across a range of workpiece materials
• Screw machine length body improves rigidity and reduces deflection compared to jobber-length bits
• 118-degree standard point angle with web-thinned, parallel web for reduced entry thrust
• Bright, uncoated finish suitable for general-purpose use without added coating cost
• ISO standard compliance for consistent dimensional accuracy

Compatibility

Designed as a general-purpose screw machine length drill bit compatible with standard straight-shank drill chucks used in drill presses, turret lathes, screw machines, and CNC equipment accepting a 0.0625-inch straight-cylindrical shank.

Installation Notes

This bit should be installed by a machinist or qualified trade professional familiar with small-diameter tooling. Secure the straight-cylindrical shank fully in the chuck before operation and verify chuck runout is within tolerance, as small-diameter bits are sensitive to misalignment. Power down and lock out the spindle before changing bits. Avoid excessive feed pressure on small-diameter high speed steel bits, as they are prone to breakage under side load.