Hertel MR34-0091.059 Chucking Reamer 0.23mm Solid Carbide

Product Description

The HERTEL MR34-0091.059 is a solid carbide chucking reamer designed for precision hole finishing in the 0.23 mm diameter range. Built from solid carbide with a bright, uncoated finish, this reamer delivers tight dimensional control with a diameter tolerance of 0.0000 to +0.0003 mm. The spiral flute geometry with left-hand spiral direction reduces chatter and improves chip evacuation during right-hand cutting operations. At 50 mm overall length with a 1.5 mm flute length, this tool is suited for applications requiring precise, shallow reaming in very small bores. Machinists and toolroom professionals working with micro-precision components are the primary users.

This chucking reamer is intended for use in CNC machining centers, manual lathes, and drill presses where collet or chuck holding is required via its straight shank. The 0.23 mm diameter makes it appropriate for micro-bore finishing in industries such as medical device manufacturing, electronics, watchmaking, and precision instrumentation. The four-flute design distributes cutting forces evenly, supporting consistent surface finish in hard or abrasive materials where carbide tooling is preferred over high-speed steel alternatives.

Key Features

• Solid carbide construction for rigidity and wear resistance in precision micro-bore applications
• 0.23 mm reamer diameter with tolerance of 0.0000 to +0.0003 mm for tight dimensional control
• Four flutes with left-hand spiral direction support smooth chip flow during right-hand cutting
• Bright, uncoated finish suitable for a range of materials without added coating variables
• Straight shank for secure seating in standard collets, chucks, and reamer holders
• 50 mm overall length with 1.5 mm flute length optimized for shallow micro-bore finishing

Compatibility

Designed as an OEM-style precision chucking reamer for use in standard straight-shank toolholders, collet chucks, and drill chucks accommodating very small diameter cutting tools in CNC and manual machine tool applications.

Installation Notes

Installation and use should be performed by qualified machinists familiar with micro-precision tooling. Ensure the machine spindle and toolholder are clean and free of runout before mounting this reamer, as any eccentricity will directly impact hole tolerance at this diameter. Power down and lock out the machine before tool changes. Avoid applying excessive feed force, as solid carbide tooling at this diameter is brittle and susceptible to breakage under lateral loading.