Hertel 79889739 Chucking Reamer 0.181 in Solid Carbide

Product Description

The HERTEL 79889739 is a solid carbide chucking reamer designed for precision hole finishing in machine shop and production environments. With a nominal diameter of 0.181 inches and a tight tolerance of 0.0000 to 0.0002 inches, it delivers accurate, repeatable bore sizing in a single pass. The four-flute straight design provides clean chip evacuation and smooth wall finish. The bright, uncoated carbide construction handles a broad range of workpiece materials without coating adhesion concerns. Machinists and toolroom technicians use this reamer in CNC machining centers, lathes, and drill presses wherever close-tolerance through-holes or blind holes are required.

This reamer is suited for production and maintenance machining applications where hole diameter consistency is critical. The straight cylindrical shank allows direct mounting in standard collet chucks, drill chucks, or floating reamer holders. At 2.75 inches overall length with a 0.875-inch flute length, the tool fits compact toolholders and is well matched to shallow-to-mid-depth hole finishing in ferrous and non-ferrous materials. It is sold and packaged individually.

Key Features

• Solid carbide construction for rigidity and extended tool life compared to HSS alternatives
• Four straight flutes for consistent chip flow and smooth bore finish
• Diameter tolerance of 0.0000 to 0.0002 inches for precise hole sizing
• Bright, uncoated finish suitable for a wide range of workpiece materials
• Straight cylindrical shank for compatibility with standard collet and drill chuck toolholders
• Right-hand cutting direction for conventional spindle rotation

Compatibility

Designed as a standard chucking reamer for use in CNC machining centers, engine lathes, and drill presses equipped with collet chucks or floating holders accepting a straight cylindrical shank in the 0.181-inch diameter class.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom technicians. Ensure the spindle is fully stopped and the machine is powered down before loading or unloading the reamer. Secure the straight shank firmly in a matched collet or chuck to minimize runout, which directly affects hole tolerance. Always apply appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish.