Chicago-latrobe 49394 Screw Machine Drill Bit 0.152 in

Product Description

The CHICAGO-LATROBE 49394 is a screw machine length drill bit designed for heavy-duty metal drilling applications. Built from high speed steel with a coated finish, this bit features a 135-degree split point that reduces walking and minimizes the need for a center punch. The web-thinned, parallel web construction improves chip evacuation and reduces thrust during entry. At 0.152 inches in diameter (Wire Size 24), it delivers a tight diameter tolerance of +0.0000 to -0.0007 inches, making it suitable for precision hole work in cast iron and steel. Licensed HVAC techs, plumbers, electricians, and other trade professionals keep this size on hand for sheet metal, structural steel, and mechanical fastener prep work.

The 49394 is suited for production and service drilling in cast iron and steel substrates. Its screw machine length body — overall length of 2-1/16 inches with a 1-inch flute length — fits standard drill chucks and magnetic drill press setups where a shorter, stiffer bit is preferred over jobber length. The compact geometry reduces deflection in tight-clearance work, making it a practical choice for in-place drilling during mechanical system installations and repairs. This bit meets NAS 907 and ISO standards, confirming dimensional and material consistency for professional use.

Key Features

• 135-degree split point reduces drill walking and lowers required entry thrust
• Web-thinned, parallel web construction improves chip clearing in steel and cast iron
• Screw machine length body (2-1/16 inches overall) provides added rigidity versus jobber-length bits
• Tight diameter tolerance: +0.0000 to -0.0007 inches for consistent hole sizing
• Right-hand cut with 2-flute regular spiral for standard drilling operations
• Meets NAS 907 and ISO standards for heavy-duty drill bit grade

Compatibility

Designed as a heavy-duty OEM-style screw machine drill bit for use in cast iron and steel. Compatible with standard straight-shank drill chucks on benchtop drill presses, hand drills, and magnetic base drills that accept a straight-cylindrical shank. Part of the CHICAGO-LATROBE Series 159 line.

Installation Notes

This bit is installed and used by machinists, pipefitters, electricians, and general trade mechanics performing metal drilling tasks. Secure the straight-cylindrical shank firmly in a properly sized chuck before use, and verify chuck key removal before powering the drill. Use cutting fluid appropriate for the workpiece material to extend bit life when drilling steel or cast iron. Inspect the cutting edges and split point for wear before each use and replace if chipping or dulling is observed.