Hertel MR34-0744.406 Chucking Reamer 0.0744 in Carbide

Product Description

The HERTEL MR34-0744.406 is a solid carbide chucking reamer designed for precision hole finishing in tight-tolerance machining applications. With a reamer diameter of 0.0744 inches (1.89 mm) and a diameter tolerance of 0.0000 to +0.0003 mm, this tool delivers accurate, repeatable hole sizing at the micro end of the decimal-inch range. The four-flute spiral configuration with left-hand spiral and right-hand cutting direction provides smooth chip evacuation and stable cutting action. The bright (polished) finish reduces friction and supports clean bore surfaces. Machinists and tool-room technicians working on precision components install this reamer in CNC machining centers, drill presses, or manual lathes using a standard straight shank chuck.

This reamer is suited for precision finishing operations in metalworking environments where hole diameter accuracy is critical. The 0.0744-inch diameter places it in the 0.0500 to 0.0999 inch diameter range, making it appropriate for small-bore work on ferrous and non-ferrous materials where solid carbide tooling is preferred over high-speed steel for improved wear resistance and dimensional consistency. Typical applications include instrument components, hydraulic fittings, and precision mechanical assemblies requiring controlled bore sizing.

Key Features

• Solid carbide construction for superior wear resistance and dimensional stability
• Four-flute spiral geometry with left-hand spiral for smooth chip flow
• Right-hand cutting direction compatible with standard spindle rotation
• Bright (polished) coating reduces friction and promotes clean bore finish
• Straight shank fits standard collets and drill chucks without special tooling
• Diameter tolerance of 0.0000 to +0.0003 mm supports tight-tolerance hole finishing

Compatibility

Designed as an OEM-style precision chucking reamer for use in CNC machining centers, drill presses, and manual lathes equipped with a straight-shank collet or drill chuck capable of holding a 0.0744-inch diameter tool.

Installation Notes

Installation and use should be performed by qualified machinists familiar with precision reaming operations. Ensure the spindle and workpiece are fully secured before engaging the tool. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain bore finish quality. Do not use this reamer as a drill — reamers require a pre-drilled pilot hole sized to within a few thousandths of the finished diameter.