Hertel MR34-0134.079 Chucking Reamer Solid Carbide

Product Description

The HERTEL MR34-0134.079 is a solid carbide chucking reamer designed for precision hole finishing in tight-tolerance machining applications. With a 0.0134-inch (0.34 mm) diameter, this micro-size reamer delivers a diameter tolerance of 0.0000 to +0.0003 mm, making it well-suited for applications where bore accuracy is critical. The 4-flute, left-hand spiral geometry with right-hand cutting direction promotes smooth chip evacuation and reduces chatter during the finishing pass. A bright polished coating keeps cutting surfaces clean and reduces built-up edge. Machinists and tool-and-die professionals working with precision components install this reamer in CNC machining centers, drill presses, or manual mills using a standard straight-shank chuck.

This reamer is intended for finish-reaming small-diameter holes in ferrous and non-ferrous materials where tight bore tolerances are required. Its micro diameter makes it particularly applicable in watchmaking, medical device manufacturing, aerospace components, and precision instrument work. The straight shank accepts standard collet chucks or drill chucks sized for this diameter range. At 1.9685 inches overall length with a 0.0787-inch flute length, the compact geometry suits shallow precision bores where minimal material removal is needed after drilling.

Key Features

• Solid carbide construction for rigidity and wear resistance in precision micro-boring applications
• 0.0134-inch (0.34 mm) cutting diameter with a tolerance of 0.0000 to +0.0003 mm
• 4-flute left-hand spiral, right-hand cutting design promotes controlled chip flow
• Bright polished finish reduces friction and minimizes material adhesion on the cutting edge
• Straight shank for secure seating in collet or drill chuck systems
• 1.9685-inch overall length suits compact workholding setups

Compatibility

Designed as an OEM-style replacement or direct-use chucking reamer for straight-shank tool holders accommodating the micro diameter range of 0.0134 inches. Verify spindle and chuck capacity before use.

Installation Notes

Installation and operation should be performed by a qualified machinist familiar with precision reaming procedures. Ensure the machine spindle is fully stopped and locked out before mounting or removing the reamer from the chuck. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain bore finish quality. Do not force-ream undersize holes — pre-drill or bore to the correct prep diameter before finishing with this tool.