Hertel 79889523 Chucking Reamer 0.138 in Solid Carbide

Product Description

The HERTEL 79889523 is a solid carbide chucking reamer designed to finish-ream precision holes to tight tolerances in a machine tool setup. With a reamer diameter of 0.138 inches and a diameter tolerance of 0.0000 to 0.0002 inches, this tool delivers the accuracy required for close-fit bore applications. The straight flute geometry and right-hand cutting direction make it well-suited for reaming through softer to medium-hardness materials. At 2.5 inches overall length with a 0.75-inch flute length, this is a compact tool intended for shallow-hole work in a drill press, lathe, or CNC machining center. Machinists and tool-and-die professionals are the primary installers.

This chucking reamer is used in metalworking and machining applications where a drilled hole must be brought to a precise finished diameter. The straight-cylindrical shank allows it to be held in a standard drill chuck or collet. It is suited for production runs and maintenance machining tasks where consistent bore diameter is critical. The four-flute design provides a balance of chip clearance and surface finish. The bright, uncoated carbide finish is appropriate for use in a range of materials without added coating considerations.

Key Features

• Solid carbide construction for rigidity and wear resistance in precision reaming
• 0.138-inch diameter with a tight tolerance of 0.0000 to 0.0002 inches for close-fit hole finishing
• Four straight flutes with right-hand cutting direction for smooth, consistent material removal
• Straight-cylindrical shank for direct chuck or collet mounting without adapters
• Bright, uncoated finish — no coating variables to account for in toolpath setup
• Compact 2.5-inch OAL with 0.75-inch flute length suited for shallow-hole applications

Compatibility

Designed as a standard chucking reamer for use in drill presses, lathes, and CNC machining centers equipped with a drill chuck or collet capable of accepting a straight-cylindrical shank in the 0.100 to 0.149-inch diameter range.

Installation Notes

Installation is performed by qualified machinists in a machine tool environment. The tool must be secured firmly in a drill chuck or collet before operation, and the spindle should be brought to a complete stop before tool changes. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain bore finish quality. Follow your machine manufacturer's recommended speeds and feeds for solid carbide reamers at this diameter range.