Hertel 79891172 Chucking Reamer Letter V Solid Carbide

Product Description

The HERTEL 79891172 is a solid carbide chucking reamer sized to Letter V, with a decimal diameter of 0.3770 inches. It is designed for precision hole finishing in metalworking applications where tight tolerances are required. The straight flute geometry and right-hand cut produce clean, accurate bores with a diameter tolerance of 0.0000 to 0.0003 inches. The straight cylindrical shank allows direct chucking in standard drill chucks or collets. At 3.5 inches overall length with a 1.25-inch flute length, this reamer is suited for short to medium-depth through-holes and blind holes in production and job-shop environments. Machinists and tool-and-die professionals are the primary users.

This reamer is used in machining operations that demand accurate final hole sizing, including fixture work, bearing fits, and dowel pin preparation. The solid carbide construction makes it appropriate for harder workpiece materials and applications where extended tool life and dimensional consistency are priorities over tougher interrupted-cut scenarios. It is packaged as a single unit and is appropriate for both manual and CNC-driven spindles in light to medium production settings.

Key Features

• Letter V size with 0.3770-inch decimal diameter and tolerance of 0.0000 to 0.0003 inches
• Solid carbide construction for extended tool life in hard and abrasive materials
• Straight flute design with 6 flutes for smooth cutting action and chip flow
• Right-hand cutting direction compatible with standard spindle rotation
• Bright uncoated finish suitable for close-tolerance inspection and measurement
• Straight cylindrical shank for secure chucking in collets or drill chucks

Compatibility

Designed as an OEM-style precision reamer for use in standard chucking setups on manual mills, drill presses, and CNC machining centers accepting straight cylindrical shanks in the 0.3770-inch diameter class.

Installation Notes

Installation and use should be performed by qualified machinists familiar with reaming operations and toolholder selection. Ensure the spindle and workpiece are properly fixtured and that the pre-drilled hole is sized correctly to allow for the appropriate reaming stock allowance before use. Use appropriate cutting fluid for the workpiece material to maintain tool life and surface finish quality. Never use a reamer to remove excessive stock; always follow recommended pre-drill sizing practices.