Hertel 79889051 Chucking Reamer 0.074 in Solid Carbide

Product Description

The HERTEL 79889051 is a solid carbide chucking reamer designed for precision hole finishing in metalworking and machining applications. With a reamer diameter of 0.074 inches and a diameter tolerance of 0.0000 to 0.0002 inches, this tool delivers tight, repeatable bore sizing in production and job-shop environments. The bright, uncoated solid carbide construction provides rigidity and wear resistance suited to hard or abrasive workpiece materials. Overall length is 1.75 inches with a 0.5-inch flute length and four straight flutes. A straight cylindrical shank allows direct mounting in standard chucks and collets. Licensed machinists and toolroom technicians are the primary installers and operators of this tool.

This chucking reamer is intended for precision reaming of small-diameter holes in the 0.0500 to 0.0999 inch diameter range. It is suited for use in CNC machining centers, drill presses, and manual lathes where hole size, surface finish, and roundness are critical. Typical applications include finish reaming of close-tolerance bores in aerospace, automotive, medical, and general precision machining. The right-hand cutting direction is compatible with standard right-hand spindle rotation. The compact overall length and straight shank make it practical for confined bores and short-reach setups.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard or abrasive materials
• 0.074-inch reamer diameter with a tolerance of 0.0000 to 0.0002 inches for tight bore sizing
• Four straight flutes for consistent chip evacuation in through and blind holes
• Bright, uncoated finish suitable for a wide range of workpiece materials
• Straight cylindrical shank for direct mounting in chucks and collets
• Right-hand cutting direction compatible with standard spindle rotation

Compatibility

Designed as an OEM-style solid carbide chucking reamer for use in standard chuck and collet systems accepting a straight cylindrical shank in the 0.0500 to 0.0999 inch diameter range.

Installation Notes

Installation and operation of this reamer should be performed by qualified machinists or toolroom personnel. Ensure the machine spindle is fully stopped and locked out before mounting or removing the tool. Seat the straight shank securely in a matched collet or drill chuck to minimize runout, which directly affects hole tolerance and tool life. Follow the machine manufacturer and tooling supplier recommendations for cutting speed, feed rate, and cutting fluid selection appropriate to the workpiece material.