Hertel MR34-0268.281 Chucking Reamer 0.68mm Carbide

Product Description

The HERTEL MR34-0268.281 is a solid carbide chucking reamer designed for precision hole finishing in close-tolerance machining applications. With a reamer diameter of 0.68 mm and a diameter tolerance of 0.0000 to +0.0003 mm, this tool delivers consistent, repeatable bore sizing across production runs. The 4-flute spiral configuration with a 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, the tool is sized for shallow-bore finish reaming. It ships in a bright, uncoated finish and is intended for use by machinists and tool-and-die professionals.

This reamer is suited for precision finish reaming of small-diameter bores in metalworking environments, including CNC machining centers and manual lathes or mills equipped with a collet chuck or drill chuck. The straight shank makes it compatible with standard collet and chuck tooling. Typical applications include bearing seat finishing, dowel pin hole preparation, and close-tolerance bore sizing in ferrous and non-ferrous materials where surface finish and dimensional accuracy are critical.

Key Features

• 0.68 mm reamer diameter with a tight tolerance of 0.0000 to +0.0003 mm for precision bore sizing
• Solid carbide construction for rigidity and wear resistance in demanding materials
• 4-flute spiral configuration with left-hand spiral and right-hand cut for efficient chip evacuation
• 50 mm overall length with 7 mm flute length suited for shallow-bore finish reaming
• Straight shank for compatibility with standard collet and drill chuck toolholding systems
• Bright, uncoated finish — ready to use as supplied or adaptable to specific coating requirements

Compatibility

Designed for use in standard straight-shank collet chucks and drill chucks on CNC machining centers, lathes, and milling machines requiring small-diameter precision finish reaming.

Installation Notes

This tool should be installed by a qualified machinist familiar with small-diameter carbide tooling. Secure the straight shank firmly in a collet or drill chuck sized to the shank diameter before use. Carbide tooling is brittle — avoid side loads, interrupted cuts, or excessive runout, which can cause tool breakage. Set spindle speed and feed rate per established parameters for solid carbide reamers in the workpiece material being machined.