Hertel MR34-0138.079 Chucking Reamer Solid Carbide

Product Description

The HERTEL MR34-0138.079 is a solid carbide chucking reamer designed for precision hole finishing in tight-tolerance applications. With a 0.0138-inch diameter, a 1.9685-inch overall length, and a 2.00 mm flute length, this tool is built for micro-bore reaming where dimensional accuracy is critical. The four-flute spiral design with a left-hand spiral and right-hand cutting direction promotes smooth chip evacuation and a consistent surface finish. A bright polished coating reduces friction and helps maintain cutting geometry. Machinists and tool-and-die professionals install this reamer in CNC machining centers, drill presses, or manual lathes for final sizing of precision bores.

This chucking reamer is suited for production and repair environments where bore tolerances are extremely tight. The straight shank provides direct, concentric chuck engagement in standard collets and drill chucks. Applications include precision instrument components, small-diameter hydraulic passages, and medical or aerospace part finishing where a reamer diameter tolerance of 0.0000 to +0.0003 mm is required. The solid carbide construction handles hard workpiece materials that would quickly wear high-speed steel tooling.

Key Features

• Solid carbide construction for extended tool life in hard and abrasive materials
• Four-flute spiral design with left-hand spiral for improved chip flow
• Right-hand cutting direction for standard machine spindle rotation
• Bright polished finish reduces friction and aids chip clearance
• Reamer diameter tolerance of 0.0000 to +0.0003 mm for tight bore control
• Straight shank for direct chuck or collet mounting without adapters

Compatibility

Designed as an OEM-style solid carbide chucking reamer for use in CNC and manual machine tool setups requiring a 0.0138-inch straight-shank reamer with a standard straight-shank interface.

Installation Notes

Installation and use of this reamer should be performed by qualified machinists or toolroom professionals. Ensure the machine spindle is fully stopped and locked out before changing tooling. Secure the straight shank in a collet or drill chuck to the appropriate torque for the chuck type to maintain concentricity. Use recommended cutting fluid for the workpiece material to preserve coating integrity and tool life.