Hertel 79888723 Chucking Reamer 0.187 in Solid Carbide

Product Description

The HERTEL 79888723 is a solid carbide chucking reamer designed for precision hole finishing in metal machining applications. With a reamer diameter of 0.187 inches and a tight tolerance range of 0.0000 to 0.0002 inches, this tool is built for accurate, repeatable sizing of drilled holes. The straight flute geometry and bright uncoated finish make it well suited for through-hole and short-depth reaming where chip evacuation is straightforward. Machinists and toolroom technicians install this reamer in CNC machining centers, manual mills, or drill presses using a standard chuck. The 4-flute configuration provides a smooth finish on the reamed bore.

This reamer is specified for dowel pin hole sizing at 0.1870 inches, making it a direct fit for precision alignment and assembly operations in tool and die, mold making, and general machining environments. It is suited for use on ferrous and non-ferrous materials where a solid carbide cutting edge is preferred over high-speed steel for extended tool life or harder workpiece materials. The straight cylindrical shank allows direct mounting in a drill chuck or collet holder without additional adapters.

Key Features

• Solid carbide construction for rigidity and extended edge life in precision reaming
• 0.187 inch diameter with a tolerance of 0.0000 to 0.0002 inches for tight bore sizing
• Designated dowel pin reamer at 0.1870 D/P for alignment hole applications
• 4-flute straight flute design for smooth surface finish and controlled chip flow
• Bright uncoated finish — no additional coating buildup on cutting edge geometry
• Right-hand cutting direction, straight cylindrical shank for standard chuck mounting

Compatibility

Designed as an OEM-style precision cutting tool for use in standard drill chucks and collet holders accepting a straight cylindrical shank in the 0.187 inch diameter class.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Secure the straight shank firmly in a drill chuck or collet holder before operation, and verify runout is within acceptable limits for the tolerance class being held. Always pre-drill or pre-bore the hole close to finish size before reaming — do not use this tool as a primary drill. Use appropriate cutting fluid for the workpiece material to protect the carbide edge and achieve the intended surface finish.