Hertel 72308083 Chucking Reamer Wire 8 Cobalt Steel

Product Description

The HERTEL 72308083 is a wire-size chucking reamer designed to finish-ream drilled holes to a precise 0.1990-inch diameter (Wire Size 8). Machined from cobalt steel with a bright, uncoated finish, it delivers the hardness and heat resistance needed for interrupted cuts and tougher workpiece materials. The straight-cylindrical shank mounts directly in a drill chuck or collet. With a 5-inch overall length and a 1.25-inch straight flute section, this reamer suits bench drill presses, knee mills, and CNC drilling centers where consistent hole tolerance is the priority. Right-hand cutting direction is standard for conventional clockwise-spindle operation.

This chucking reamer is suited for production and job-shop machining applications requiring close-tolerance hole finishing in the 0.1500-to-0.1999-inch decimal range. Typical use cases include reaming holes in steel, cast iron, aluminum, and similar machinable materials where a drilled hole must be brought to a controlled final diameter. It is sized for operations that do not require oversized or undersized reaming, and it is not a dowel pin reamer. Machinists and tool-and-die professionals are the primary installers.

Key Features

• Cobalt steel construction resists heat buildup during extended reaming operations
• Bright uncoated finish allows direct visual inspection of cutting edges
• Straight-cylindrical shank fits standard drill chucks and ER collet systems
• Straight flute geometry provides clean entry and chip clearance in through-holes
• Right-hand cutting direction compatible with conventional spindle rotation
• Wire Size 8 at 0.1990 inches covers the upper range of the 0.1500-to-0.1999-inch diameter class

Compatibility

Designed as an OEM-style replacement or direct-use chucking reamer for machine tool setups requiring a Wire Size 8 straight-flute reamer with a straight-cylindrical shank.

Installation Notes

A licensed machinist or qualified toolroom technician should install and operate this reamer. Power down and lock out the spindle before seating or removing the shank from the chuck or collet. Use cutting fluid appropriate for the workpiece material to extend tool life and maintain hole finish. Follow shop safety standards and applicable OSHA machining guidelines when operating rotating cutting tools.