Hertel 72294085 Chucking Reamer Size 8 Hss 6 Flute

Product Description

The HERTEL 72294085 is a high-speed steel (HSS) chucking reamer designed for precision hole finishing in metal and similar materials. Built to wire gauge size 8, it produces a finished bore diameter of 0.1990 inches with six spiral flutes in a right-hand spiral configuration. The straight-cylindrical shank seats securely in standard drill press or lathe chucks. With an overall length of 3.625 inches and a flute length of 1.25 inches, this reamer suits close-tolerance finishing passes where drill-only results are not acceptable. Machinists, tool-and-die tradespeople, and maintenance mechanics rely on this style of reamer for repeatable, accurate hole sizing on production and repair work alike.

This chucking reamer is applied in machine shop, manufacturing, and industrial maintenance environments where drilled holes require accurate final sizing and smooth bore finish. The right-hand spiral flute geometry helps clear chips efficiently during the reaming pass, reducing chatter and improving surface finish. It is suited to manual and CNC lathes, drill presses, and milling machines equipped with a chuck or collet capable of holding a straight-cylindrical shank. Typical applications include bearing seat preparation, dowel pin hole finishing, and precision fit work on ferrous and non-ferrous workpieces.

Key Features

• Wire size 8 reamer producing a 0.1990-inch finished bore diameter
• Six spiral flutes with right-hand spiral direction for efficient chip evacuation
• HSS tool material provides hardness and wear resistance suitable for general-purpose machining
• Straight-cylindrical shank compatible with standard drill chucks and collets
• Overall length of 3.625 inches with 1.25-inch flute length for controlled reach in shallow bores

Compatibility

Designed as an OEM-style chucking reamer for use in standard drill press, lathe, or milling machine chucks accepting a straight-cylindrical shank in the wire size 8 range.

Installation Notes

Chucking reamers are installed and operated by machinists using lathes, drill presses, or milling machines. Secure the straight-cylindrical shank firmly in the chuck or collet before operation and verify the workpiece is clamped to prevent movement. Use appropriate cutting fluid for the workpiece material to extend tool life and improve bore finish. Always bring the spindle to the correct reaming speed before feeding the tool into the bore — running a reamer at drill speeds will reduce tool life and bore quality.