Hertel 79889721 Chucking Reamer 0.175 in Solid Carbide

Product Description

The HERTEL 79889721 is a solid carbide chucking reamer designed for precision hole finishing in metal and composite materials. Built with a straight flute geometry and a straight cylindrical shank, this reamer produces accurate, smooth bores with a diameter of 0.175 inches and a diameter tolerance of 0.0000 to 0.0002 inches. The 4-flute configuration promotes chip evacuation and cutting stability. At 2.75 inches overall length with a 0.875-inch flute length, this compact tool suits applications where close-tolerance reaming is required in confined or shallow bores. The bright, uncoated carbide surface is well suited for use in ferrous and non-ferrous materials across machining operations in manufacturing, toolroom, and maintenance environments.

This chucking reamer is intended for use in CNC machining centers, drill presses, and manual lathes where a precision-ground, right-hand-cut reamer is required to finish drilled or bored holes to tight dimensional tolerances. The 0.175-inch diameter targets small-bore applications such as dowel pin holes, bearing fits, and precision bushing seats. Machinists and toolroom technicians working in job shops, production facilities, and maintenance departments are the primary users of this tool.

Key Features

• Solid carbide construction for rigidity and wear resistance in demanding cutting conditions
• Diameter tolerance of 0.0000 to 0.0002 inches for close-tolerance hole finishing
• 4-flute straight geometry supports smooth cutting and consistent chip flow
• Bright, uncoated finish compatible with a wide range of workpiece materials
• Straight cylindrical shank fits standard drill chucks and collet holders
• Right-hand cutting direction matches standard machine spindle rotation

Compatibility

Designed as an OEM-style chucking reamer for use in standard drill chucks, collet holders, and floating reamer holders on CNC and manual machining equipment accepting a straight cylindrical shank at 0.175 inches nominal diameter.

Installation Notes

This tool should be installed by a qualified machinist or toolroom technician following the machine tool manufacturer's setup procedures. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before inserting or removing the reamer from the chuck or collet. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain dimensional accuracy. Inspect the reamer for chipping or wear before each use, as carbide tooling is brittle and should not be subjected to interrupted cuts or excessive runout.