Hertel MR34-0342.281 Chucking Reamer 0.87mm Spiral Solid Carbide

Product Description

The HERTEL MR34-0342.281 is a solid carbide chucking reamer designed for precision hole finishing in tight-tolerance applications. With a 0.87 mm reamer diameter and a diameter tolerance of 0.0000 to +0.0003 mm, this tool holds size accurately in production and job-shop environments. The spiral flute geometry with left-hand spiral direction and right-hand cutting action helps evacuate chips efficiently during through-hole and blind-hole reaming. A bright polished finish reduces friction and aids chip flow. This reamer is typically installed in CNC machining centers, drill presses, and automatic screw machines by machinists and toolroom professionals working in precision metalworking, medical device, and electronics manufacturing.

This chucking reamer is suited for finishing small-diameter bores in ferrous and non-ferrous metals where close dimensional control is required. The straight shank allows direct mounting in standard collet chucks and drill press chucks without adapters. With an overall length of 50 mm and a flute length of 7 mm, it is well-proportioned for short, precise reaming passes in shallow bores. Applications include precision instrument components, hydraulic valve bodies, and other workpieces requiring consistent hole diameter within fractions of a millimeter.

Key Features

• 0.87 mm reamer diameter with tight tolerance of 0.0000 to +0.0003 mm for precision bore finishing
• Solid carbide construction for rigidity and wear resistance in demanding materials
• 4-flute spiral geometry with left-hand spiral and right-hand cut for effective chip evacuation
• Bright polished coating reduces friction and extends tool life
• Straight shank fits standard collet and drill chuck toolholders without adapters
• 50 mm overall length with 7 mm flute length suited for shallow precision bores

Compatibility

Designed as a direct-mount chucking reamer for use in standard straight-shank collet chucks and drill press chucks on CNC machining centers, drill presses, and automatic screw machines requiring 0.87 mm bore finishing capability.

Installation Notes

Installation and use of this reamer should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and locked out before mounting or removing the reamer from the toolholder. Secure the straight shank firmly in a properly sized collet or drill chuck to minimize runout, which is critical at this diameter. Use appropriate cutting fluid for the workpiece material and verify spindle speed and feed rate are within the tool manufacturer recommendations for solid carbide reamers at this diameter before beginning the cut.