Hertel MR34-0213.118 Chucking Reamer 0.54mm Solid Carbide

Product Description

The HERTEL MR34-0213.118 is a solid carbide chucking reamer designed for precision hole finishing in tight-tolerance applications. With a reamer diameter of 0.54 mm and a diameter tolerance of 0.0000 to +0.0003 mm, this tool delivers consistent, accurate results in production and toolroom environments. The spiral flute geometry with left-hand spiral direction promotes smooth chip evacuation while the right-hand cutting direction drives the tool forward efficiently. At 50 mm overall length with a 3 mm flute length, it is built for small-diameter reaming where rigidity and runout control are critical. Machinists and tool-and-die professionals working with micro-diameter bores rely on this class of reamer for final sizing passes.

This chucking reamer is suited for use on CNC machining centers, manual mills, and drill presses where a straight shank can be held in a precision collet or chuck. The bright uncoated finish makes it appropriate for a wide range of ferrous and non-ferrous materials where coating buildup or edge rounding from coating application would compromise hole quality. It is sized for applications in the sub-1 mm diameter range, making it a common choice for watch components, medical device parts, instrument housings, and precision mechanical assemblies requiring close bore tolerances.

Key Features

• Solid carbide construction provides rigidity and wear resistance in micro-diameter reaming
• 0.54 mm reamer diameter with tolerance of 0.0000 to +0.0003 mm for tight-tolerance bore finishing
• Left-hand spiral flute geometry promotes effective chip evacuation during right-hand cutting
• 4-flute configuration improves surface finish and dimensional consistency
• Straight shank compatible with standard precision collets and chucks
• Bright uncoated finish suited for applications where coating is not required or desired

Compatibility

Designed as an OEM-style chucking reamer for use in straight-shank tool holders, precision collets, and drill chucks on CNC machining centers and manual machine tools capable of holding sub-1 mm diameter tooling.

Installation Notes

Installation and use of this tool should be performed by qualified machinists familiar with micro-diameter tooling. Ensure the machine spindle and collet or chuck are clean and free of debris before seating the straight shank, as runout at this diameter scale has a significant effect on hole quality and tool life. Use appropriate cutting fluid for the workpiece material, and verify spindle speed and feed rate against the tool manufacturer recommendations for solid carbide reamers at this diameter. Never force the reamer into an undersized pilot hole — ensure the pre-drilled hole is within the recommended stock allowance for reaming.