Hertel MR34-0901.438 Chucking Reamer 2.29mm Solid Carbide

Product Description

The HERTEL MR34-0901.438 is a solid carbide chucking reamer designed for precision hole finishing in metalworking and machining applications. With a 2.29 mm reamer diameter and a tight diameter tolerance of 0.0000 to +0.0003 mm, this tool delivers accurate, repeatable bore sizing in close-tolerance work. The spiral flute geometry with left-hand spiral direction helps evacuate chips efficiently while the right-hand cutting direction drives the tool forward. At 50 mm overall length with an 11 mm flute length, this compact reamer suits small-bore finishing operations where precision is critical. Machinists and tool-and-die professionals select this tool for production and repair work requiring consistent hole quality.

This chucking reamer is suited for use in CNC machining centers, drill presses, and lathes where a straight shank can be clamped directly in a chuck or collet. The 2.29 mm diameter falls within the 2.00 to 3.00 mm range, making it appropriate for small-diameter precision bores in ferrous and non-ferrous materials. The bright, uncoated finish maintains dimensional accuracy without coating buildup affecting finished hole size. Four flutes provide a balance of chip clearance and surface finish quality in reamed holes.

Key Features

• Solid carbide construction for rigidity and wear resistance in precision reaming
• 2.29 mm reamer diameter with tolerance of 0.0000 to +0.0003 mm for close-tolerance bore finishing
• Left-hand spiral flutes with right-hand cut for efficient chip evacuation
• 4-flute design balancing surface finish quality and chip clearance
• Straight shank for direct clamping in chucks or collets
• Bright, uncoated finish to preserve dimensional accuracy

Compatibility

Designed as an OEM-style chucking reamer compatible with CNC machining centers, drill presses, and lathes accepting a straight-shank tool in the 2.00 to 3.00 mm diameter range.

Installation Notes

Installation and use of this reamer should be performed by qualified machinists following established shop safety procedures. Ensure the machine spindle is fully stopped and locked out before mounting or removing the tool from the chuck or collet. Use appropriate cutting fluid for the workpiece material to extend tool life and improve hole finish. Avoid forcing the reamer into an undersized pilot hole — bore or drill to the correct pre-ream diameter before finishing.