Hertel 79890638 Chucking Reamer Wire Size 26 Solid Carbide

Product Description

The HERTEL 79890638 is a solid carbide chucking reamer designed to finish-ream holes to a precise wire size 26 diameter of 0.1470 inches. Built with a straight flute geometry and a straight cylindrical shank, this reamer delivers controlled material removal and accurate sizing in both ferrous and non-ferrous workpieces. The bright, uncoated carbide construction provides rigidity and edge retention suited to close-tolerance finishing work. With an overall length of 2.5 inches and a flute length of 0.75 inches, it is sized for use in CNC machining centers, drill presses, and turret lathes where repeatability and hole-size accuracy are critical. Machinists and toolroom technicians rely on this style of reamer for production and repair applications.

This chucking reamer is appropriate for short, through, or blind hole reaming operations where a wire size 26 finished diameter is required. The straight shank allows direct mounting in drill chucks, collets, and floating reamer holders. Its 4-flute straight configuration suits applications in softer steels, aluminum, brass, and plastics where chip clearance and surface finish are the primary concerns. Typical use cases include precision hole sizing in machined components, fixture plates, and tooling assemblies in job shop and production environments.

Key Features

• Wire size 26 finished diameter of 0.1470 inches with a tolerance of 0.0000 to 0.0002 inches
• Solid carbide construction for rigidity and extended edge life
• 4-flute straight flute design for smooth surface finish in non-interrupted cuts
• Straight cylindrical shank for compatibility with standard drill chucks and collets
• Bright, uncoated finish — no coating buildup on cutting edges
• Right-hand cutting direction for conventional reaming operations

Compatibility

Designed as an OEM-style chucking reamer for use in any machine tool spindle accepting a straight cylindrical shank at this diameter range, including CNC machining centers, drill presses, and turret lathes equipped with drill chucks or collet holders sized for sub-quarter-inch shanks.

Installation Notes

Installation and operation should be performed by a qualified machinist familiar with cutting tool setup and machine tool operation. Ensure the spindle and workpiece are fully secured and the machine is at a complete stop before mounting or removing the reamer. Use a floating reamer holder where possible to compensate for minor spindle misalignment and avoid bell-mouthing the finished hole. Always use appropriate cutting fluid for the workpiece material to extend tool life and maintain surface finish quality.