Hertel 79890802 Chucking Reamer Wire 45 0.0820 in Carbide

Product Description

The HERTEL 79890802 is a solid carbide chucking reamer in wire gauge size 45, designed to finish-ream holes to a precise decimal diameter of 0.0820 inches. Built from solid carbide with a bright, uncoated finish, this reamer delivers tight tolerance control, holding between 0.0000 and 0.0002 inches over nominal. The straight-cylindrical shank seats securely in a collet or drill chuck, and the four-flute, straight-flute geometry provides consistent chip evacuation on right-hand cutting operations. At 2 inches overall length with a 0.5-inch flute length, it is sized for shallow, precision hole-finishing work where bore quality and dimensional accuracy are critical.

This reamer is suited for precision machine shop and production environments where wire-gauge holes require tight tolerances and smooth surface finish. Typical applications include finishing pilot holes, bearing seats, pin holes, and close-tolerance through-holes in metals such as aluminum, brass, and steel. It is installed and operated by machinists, tool-and-die makers, and maintenance technicians using CNC machining centers, knee mills, or drill presses equipped with appropriate speed-and-feed controls for carbide tooling.

Key Features

• Wire size 45 designation with 0.0820-inch decimal diameter for consistent, repeatable hole sizing
• Solid carbide construction provides hardness and wear resistance for extended tool life in abrasive materials
• Tight diameter tolerance of 0.0000 to 0.0002 inches over nominal supports precision fit requirements
• Four straight flutes with right-hand cut geometry for smooth chip flow and consistent finish
• Bright, uncoated finish is suitable for use with cutting fluids across a range of workpiece materials
• Straight-cylindrical shank compatible with standard collets, end-mill holders, and drill chucks

Compatibility

Designed as an OEM-style precision reamer for use in any machine tool equipped with a straight-shank collet or drill chuck capable of accepting a straight-cylindrical shank at the appropriate diameter.

Installation Notes

Carbide reamers must be run at appropriate speeds and feeds for the workpiece material — exceeding recommended parameters risks chipping the cutting edges. Always ensure the workpiece is securely fixtured and the spindle is properly aligned before engaging the reamer. Apply cutting fluid appropriate to the workpiece material to reduce heat and extend tool life. Inspect the shank and cutting edges for chips or damage before each use, as carbide is brittle and susceptible to breakage if impacted or side-loaded.