Hertel MR34-0256.281 Chucking Reamer 0.65mm Solid Carbide

Product Description

The HERTEL MR34-0256.281 is a solid carbide chucking reamer designed for precision hole finishing in tight-tolerance machining applications. Built with a 0.65 mm reamer diameter and a right-hand cutting direction, it delivers controlled, repeatable material removal in pre-drilled holes. The left-hand spiral flute geometry helps evacuate chips effectively during the cut. With a reamer diameter tolerance of 0.0000 to +0.0003 mm, this tool is suited for applications where bore accuracy is critical. Machinists and tool-and-die professionals use this reamer in CNC machining centers, drill presses, and manual lathes equipped with a collet or drill chuck.

This chucking reamer is intended for use in precision machining environments where small-diameter bores require a high degree of dimensional accuracy. The straight shank allows it to seat securely in standard collet chucks and drill chucks across a range of machine tool setups. At 50 mm overall length with a 7 mm flute length, this tool is sized for shallow, fine-diameter finishing passes. It is sold individually and is suited for production machining, toolroom work, and repair applications requiring sub-millimeter bore finishing.

Key Features

• 0.65 mm reamer diameter with a tight tolerance of 0.0000 to +0.0003 mm for precision bore finishing
• Solid carbide construction for rigidity and wear resistance in hard or abrasive materials
• Left-hand spiral flute geometry promotes chip evacuation during right-hand cutting
• 4 flutes provide a balanced cutting action and smooth surface finish
• Straight shank for compatibility with standard collet and drill chuck toolholding
• Bright/uncoated finish — no coating buildup risk in tight-tolerance bores

Compatibility

Designed as an OEM-style chucking reamer for use in CNC machining centers, drill presses, and lathes accepting straight-shank tooling in the sub-1 mm diameter range.

Installation Notes

This reamer should be installed by a qualified machinist following standard toolroom practices. Ensure the machine spindle is fully stopped and locked out before securing or removing the tool from the chuck. Use a correctly sized collet or drill chuck to grip the straight shank without runout. Always pre-drill the bore to the appropriate pilot diameter before reaming — do not use a chucking reamer to remove excess stock.