Hertel 79891156 Solid Carbide Chucking Reamer Letter S

Product Description

The HERTEL 79891156 is a solid carbide chucking reamer sized to Letter S (0.3480 inches), designed for precision hole finishing in metal components. With a straight flute configuration and right-hand cutting direction, it produces accurate, smooth bores in materials where tight tolerances are required. The reamer holds a diameter tolerance of 0.0000 to 0.0003 inches, making it suitable for applications demanding close fits. Overall length is 3.5 inches with a 1.25-inch flute length and a straight cylindrical shank for secure chuck engagement. Machinists and tool-and-die professionals use this reamer on CNC lathes, mills, and drill presses.

This chucking reamer is appropriate for general machining, production, and maintenance operations where Letter S bore dimensions are specified. It is well suited for finishing pre-drilled or bored holes in steel, cast iron, and similar ferrous materials in both job shop and production environments. The bright, uncoated finish is standard for carbide reamers used across a broad range of cutting applications without specialty coating requirements.

Key Features

• Solid carbide construction for rigidity and wear resistance in precision boring operations
• Letter S diameter (0.3480 inches) with a tight tolerance of 0.0000 to 0.0003 inches
• 6-flute straight configuration for consistent surface finish and chip clearance
• Right-hand cutting direction with straight cylindrical shank for standard chuck mounting
• Bright, uncoated finish suitable for a wide range of workpiece materials
• Compact 3.5-inch OAL with 1.25-inch flute length for controlled reach in shallow to mid-depth holes

Compatibility

Designed as a standard chucking reamer for use in any lathe, mill, or drill press chuck accepting a straight cylindrical shank of the corresponding diameter. Verify spindle runout and chuck condition before use to maintain tolerance integrity.

Installation Notes

Installation and use of this reamer should be performed by a qualified machinist familiar with reaming operations. Power down and lock out the machine spindle before inserting or removing the reamer from the chuck. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain bore finish. Do not use this reamer to remove excessive stock; pre-drill or bore the hole to within a few thousandths of final size before reaming.