Chicago-latrobe 48706 Screw Machine Drill Bit 0.204 in Hss

Product Description

The CHICAGO-LATROBE 48706 is a screw machine length drill bit designed for high-speed, close-tolerance drilling in metalworking applications. Built from high speed steel with a bright, uncoated finish, it features a 0.204-inch diameter (wire size 6), a standard 118-degree point angle, and a right-hand spiral flute configuration. The shorter screw machine length body provides added rigidity compared to jobber-length bits, reducing deflection and improving hole accuracy. Web thinning reduces thrust requirements at the point, making it well suited for production drilling environments where feed rates and cycle times matter. General purpose grade, suitable for use in drill presses, CNC machines, and manual lathes.

This bit is intended for drilling cast iron, non-ferrous metals, and steel in light to medium production settings. The straight cylindrical shank seats securely in standard drill chucks without the need for specialized toolholding. The screw machine length format is a common choice in turret lathes, screw machines, and short-bed drill presses where clearance is limited. It is manufactured to ISO standards and falls within the Series 157 general purpose line. Machinists, tool-and-die workers, and maintenance technicians in industrial and fabrication shops are the primary users.

Key Features

• 0.204-inch diameter, wire size 6, with a diameter tolerance of +0.0000 to -0.0007 inches
• 118-degree standard point angle with web thinning for reduced thrust at entry
• High speed steel construction with bright, uncoated finish
• Right-hand cut, regular spiral, two-flute design for efficient chip evacuation
• Screw machine length body for increased rigidity and reduced deflection
• Manufactured to ISO standards, Series 157 general purpose grade

Compatibility

Rated for drilling cast iron, non-ferrous metals, and steel. Compatible with standard drill chucks accepting straight cylindrical shanks. Fits applications requiring wire size 6 or 0.2040-inch diameter within the 0.2000 to 0.2500-inch drill bit size range.

Installation Notes

Installation is performed by machinists and tool-and-die professionals using standard drill chucks or collet holders. Ensure the shank is fully seated and the chuck is tightened before operation. Power down the machine and lock out the spindle before changing bits. Do not use this bit beyond the rated workpiece materials listed by the manufacturer, as doing so may result in premature wear or breakage.