Hertel 72308547 Chucking Reamer Size 54 Cobalt Steel

Product Description

The HERTEL 72308547 is a wire-gauge chucking reamer sized to a No. 54 wire diameter, producing a finished bore of 0.0550 inches. Built from cobalt steel with a bright, uncoated finish, it delivers the heat and wear resistance needed for reaming harder ferrous and exotic alloy workpieces. The straight flute geometry and right-hand cutting direction are standard for general-purpose through-hole reaming on drill presses, lathes, and CNC machining centers. Four flutes provide a balance of chip clearance and surface finish quality. The straight-cylindrical shank seats directly in standard drill chucks or collet holders without adapters, making tool changes straightforward in production and job-shop environments.

This reamer is suited for precision hole finishing in metalworking applications where wire-gauge tolerances are required. With an overall length of 2.5 inches and a flute length of 0.5 inches, it is sized for shallow reaming passes in small-diameter through holes. Machinists, tool-and-die makers, and maintenance technicians working on small-bore components such as bushings, dowel pin holes, and instrument housings will find this size range common in their work. It is not designed as a dowel pin reamer and is not an over- or under-size variant.

Key Features

• Wire-gauge No. 54 diameter: 0.0550 inches, within the 0.0500 to 0.0999 inch decimal range
• Cobalt steel construction for improved heat resistance over standard high-speed steel
• Bright, uncoated finish — ready to use as supplied or compatible with post-treatment coatings
• 4-flute straight geometry balances chip evacuation with bore surface finish
• Right-hand cutting direction, compatible with standard spindle rotation
• Straight-cylindrical shank fits standard drill chucks and collets with no adapter required

Compatibility

Designed as an OEM-style chucking reamer for use in any machine tool setup accepting a straight-cylindrical shank of equivalent diameter, including drill presses, engine lathes, turret lathes, and CNC machining centers performing small-bore hole finishing operations.

Installation Notes

Chucking reamers are installed and removed by qualified machinists or toolroom technicians. Power down and lock out the machine spindle before changing tooling. Secure the straight-cylindrical shank firmly in the chuck or collet to the tool-holder manufacturer's specified clamping torque range. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain bore tolerance. Never use a reamer to remove more stock than recommended for the diameter class — pre-drill or bore to within a few thousandths of finished size before reaming.