Hertel 79891289 Chucking Reamer 5.5 Mm Solid Carbide

Product Description

The HERTEL 79891289 is a solid carbide chucking reamer designed to finish-ream precision holes to a 5.5 mm (0.2165 inch) diameter. Built from solid carbide with a bright, uncoated finish, this reamer delivers tight dimensional control with a diameter tolerance of 0.0000 to 0.0002 inches. The four-flute, straight-flute geometry produces clean, accurate bores in a right-hand cutting direction. With an overall length of 3 inches and a 1-inch flute length, the tool is sized for short-reach applications in CNC machining centers, drill presses, and manual lathes. It is suited for machinists and toolroom professionals working with close-tolerance hole finishing in metal components.

This chucking reamer is used in precision metalworking applications where hole diameter accuracy and surface finish are critical. The straight cylindrical shank allows direct mounting in standard chucks or collet holders without additional adapters. Typical applications include finish-reaming drilled or bored holes in ferrous and non-ferrous metals where tight geometric tolerances are required. The solid carbide construction supports use at higher cutting speeds than high-speed steel alternatives, making it well suited for production environments and short-run toolroom work alike.

Key Features

• Solid carbide construction for wear resistance and dimensional stability at elevated cutting speeds
• 5.5 mm (0.2165 inch) reamer diameter with a tolerance of 0.0000 to 0.0002 inches
• Four straight flutes in a right-hand cutting direction for smooth, consistent material removal
• Bright, uncoated finish suitable for general-purpose metal finishing operations
• Straight cylindrical shank for direct mounting in standard chucks or collet holders
• Compact 3-inch overall length with a 1-inch flute length for short-reach applications

Compatibility

Designed as an OEM-style replacement or direct toolroom addition for standard chucking reamer applications requiring a 5.5 mm diameter, straight-shank solid carbide tool compatible with conventional chuck and collet holder setups.

Installation Notes

Installation should be performed by a qualified machinist following standard toolholding procedures. Ensure the machine spindle is fully stopped and the chuck or collet holder is clean and free of debris before mounting the reamer. Secure the straight shank with appropriate clamping force to prevent slippage during cutting. Follow the machine manufacturer and tooling guidelines for feed rates and cutting speeds appropriate to solid carbide reamers in the workpiece material being machined.