Hertel MR34-0779.438 Chucking Reamer 5/64 in Solid Carbide

Product Description

The HERTEL MR34-0779.438 is a solid carbide chucking reamer designed for precision hole finishing in metalworking and machining applications. With a reamer diameter of 5/64 inches (0.0781 inches decimal) and a diameter tolerance of 0.0000 to +0.0003 mm, this tool holds tight size control in critical bore work. The 4-flute, left-hand spiral design with right-hand cutting direction promotes smooth chip evacuation and reduced chatter. A bright polished finish minimizes built-up edge on the cutting faces. The straight shank seats directly in standard drill chucks or collets, making it a practical choice for CNC machining centers, drill presses, and manual lathes.

This reamer is suited for light-stock removal passes to bring drilled or bored holes to final dimensional tolerance. The compact overall length of 1.9685 inches and flute length of 0.4331 inches (11 mm) make it appropriate for shallow-depth reaming operations in small-diameter holes. Solid carbide construction supports use in harder workpiece materials where high-speed steel tooling would wear prematurely. Machinists, tool-and-die makers, and precision machining shops are the primary users of this tool.

Key Features

• Solid carbide construction for extended tool life in hard or abrasive materials
• 4-flute left-hand spiral geometry with right-hand cutting direction for smooth chip flow
• Diameter tolerance of 0.0000 to +0.0003 mm for tight bore-size control
• Bright polished finish reduces friction and built-up edge during cutting
• Straight shank for direct chuck or collet mounting without adapters
• Compact 1.9685-inch overall length suited to shallow reaming operations

Compatibility

Designed as a standard chucking reamer for use in CNC machining centers, drill presses, and lathes equipped with drill chucks or collets accepting a straight-shank tool at the 5/64-inch diameter range.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the straight shank fully in the collet or chuck and verify runout before taking a reaming pass. Use appropriate cutting fluid for the workpiece material to protect the cutting edges and maintain dimensional accuracy.