Hertel MR34-0252.281 Chucking Reamer 0.64mm Solid Carbide

Product Description

The HERTEL MR34-0252.281 is a solid carbide chucking reamer designed for precision hole finishing in tight-tolerance applications. With a 0.64 mm reamer diameter and a diameter tolerance of 0.0000 to +0.0003 mm, this tool delivers accurate, repeatable results in small-bore work. The 4-flute spiral design with left-hand spiral direction and right-hand cutting action helps evacuate chips efficiently while maintaining a smooth cutting action. At 50 mm overall length with a 7 mm flute length, it is suited for shallow, precise reaming operations. Machinists and toolroom professionals install this reamer in CNC machining centers, drill presses, and manual mills using standard straight-shank tool holders.

This chucking reamer is intended for precision finishing of small-diameter bores in metalworking environments, including production machining, toolroom work, and repair operations. The bright, uncoated finish makes it suitable for a wide range of materials where coating interaction is a concern. Its straight shank allows direct mounting in standard collets and chucks without adapters, making it a straightforward drop-in for existing setups.

Key Features

• Solid carbide construction for rigidity and wear resistance in precision reaming
• 0.64 mm reamer diameter with a tight tolerance of 0.0000 to +0.0003 mm for accurate hole sizing
• 4-flute spiral configuration with left-hand spiral and right-hand cut for efficient chip evacuation
• Bright, uncoated finish compatible with a wide variety of base materials
• Straight shank for direct mounting in standard collets and chucks
• Compact 50 mm overall length with 7 mm flute length for controlled shallow-bore applications

Compatibility

Designed as an OEM-style chucking reamer for use in standard straight-shank collet chucks and drill chucks on CNC machining centers, drill presses, and manual milling machines requiring 0.64 mm bore finishing capability.

Installation Notes

Installation and use of this reamer should be performed by qualified machinists or toolroom professionals familiar with small-diameter tooling. Ensure the spindle is fully stopped and the machine is powered down before loading or removing the reamer from the tool holder. Secure the straight shank firmly in a properly sized collet or chuck to minimize runout, which is critical at this diameter. Follow the machine manufacturer and applicable shop safety guidelines for speeds, feeds, and coolant use when working with solid carbide tooling at sub-millimeter diameters.