Hertel MR34-0338.281 Chucking Reamer 0.86mm Spiral Flute

Product Description

The HERTEL MR34-0338.281 is a solid carbide chucking reamer designed for precision hole finishing in tight-tolerance machining applications. With a 0.86 mm cutting diameter and a bright polished finish, this reamer delivers accurate, repeatable results in small-bore work where surface finish and dimensional control are critical. The four-flute spiral design with left-hand spiral direction and right-hand cut promotes smooth chip evacuation and reduces chatter during the reaming pass. Machinists and toolroom professionals use this tool in CNC machining centers, drill presses, and manual lathes equipped with a chuck or collet setup.

This chucking reamer is suited for precision finishing of small-diameter bores in metalworking environments, including production shops and toolrooms. The straight shank allows direct mounting in a drill chuck or collet holder. Its compact overall length of 50 mm and 7 mm flute length make it appropriate for shallow, close-tolerance bore finishing where a standard reamer geometry would be impractical. The reamer diameter tolerance of 0.0000 to +0.0003 mm supports applications demanding tight fit classifications.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard or abrasive materials
• 0.86 mm cutting diameter with a tolerance of 0.0000 to +0.0003 mm for close-tolerance bore finishing
• Four-flute spiral configuration with left-hand spiral and right-hand cut for smooth chip flow
• Bright polished coating minimizes friction and supports clean surface finishes
• Straight shank for direct chuck or collet mounting without adapters
• Compact 50 mm overall length with 7 mm flute length suited for shallow bore applications

Compatibility

Designed as an OEM-style precision cutting tool for use in standard chuck or collet setups on CNC machining centers, drill presses, and manual lathes capable of accepting a straight-shank reamer.

Installation Notes

Installation of this chucking reamer should be performed by a qualified machinist familiar with small-diameter precision cutting tools. Ensure the machine spindle and collet or chuck are clean and free of runout before seating the shank. Power down the machine completely before tool changes. Avoid applying side loads or using the reamer for material removal beyond the designed finishing allowance, as solid carbide tooling at this diameter is brittle and susceptible to breakage under lateral stress.