Hertel 72300627 Chucking Reamer 31/32 in Cobalt Steel

Product Description

The HERTEL 72300627 is a cobalt steel chucking reamer designed for precision hole finishing in metal machining applications. With a reamer diameter of 31/32 inches (0.9688 inches decimal) and a 10-inch overall length, this tool delivers accurate, repeatable sizing in through-holes and blind bores. The straight flute geometry and bright uncoated finish are well-suited for finishing operations in softer ferrous and non-ferrous materials. Machinists and toolroom professionals use this reamer to bring pre-drilled or bored holes to tight tolerances. The straight-cylindrical shank mounts directly in drill chucks, collet chucks, or floating holders on lathes, mills, and drill presses.

This chucking reamer is intended for machine tool use in job shop, production, and maintenance-repair-overhaul environments. The 2-5/8 inch flute length accommodates typical hole depths encountered in general metalworking. Right-hand cutting direction is standard for conventional spindle rotation. The cobalt steel construction provides improved heat and wear resistance compared to standard high-speed steel, making it a practical choice when cutting harder alloys or working in higher-cycle applications.

Key Features

• Cobalt steel construction for improved wear and heat resistance over standard HSS
• Straight flute design suited for finishing softer ferrous and non-ferrous materials
• Bright uncoated finish — no coating buildup affecting dimensional accuracy
• Straight-cylindrical shank for direct mounting in drill chucks or collet holders
• Right-hand cutting direction compatible with standard machine spindle rotation
• Not designed as an over/under size or dowel pin reamer — nominal sizing only

Compatibility

Designed as a standard chucking reamer for use in lathes, milling machines, drill presses, and similar machine tools equipped with drill chucks or collet chuck systems accepting a straight-cylindrical shank.

Installation Notes

Installation and use should be performed by a qualified machinist following standard shop safety procedures. Power down and lock out the machine spindle before mounting or removing the reamer. Ensure the shank is fully seated and the chuck is tightened securely before operation. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain hole quality.