Hertel 72029101 Chucking Reamer 0.2910 in Hss 6 Flutes

Product Description

The HERTEL 72029101 is a straight-flute chucking reamer designed for precision hole finishing in metalworking applications. Ground from high-speed steel (HSS) with a bright, uncoated finish, it delivers accurate sizing in through-hole and blind-hole operations on a wide range of ferrous and non-ferrous materials. The reamer measures 0.2910 inches in diameter with a 6-inch overall length and a 1.5-inch flute length. Its straight-cylindrical shank seats securely in standard drill chucks or collet holders, making it a reliable choice for machine shop technicians and maintenance machinists who require repeatable, close-tolerance results.

This reamer is suited for manual machining centers, knee mills, drill presses, and CNC operations where a finished bore diameter of 0.2910 inches is required. The 6-flute configuration provides improved surface finish and chip distribution compared to lower-flute-count reamers, making it appropriate for production runs as well as one-off precision fits. Right-hand cutting direction is standard for conventional clockwise spindle rotation. Typical applications include finishing reamed holes for dowel pins, bushings, and close-tolerance shaft fits in general manufacturing, tool and die, and maintenance environments.

Key Features

• 0.2910-inch finished bore diameter for precise, repeatable hole sizing
• 6 straight flutes promote even chip load and improved surface finish
• High-speed steel (HSS) construction provides toughness across a broad range of work materials
• Bright, uncoated finish suitable for use with standard cutting fluids
• Straight-cylindrical shank compatible with drill chucks and collet holders
• Right-hand cutting direction for standard clockwise spindle rotation

Compatibility

Designed as a standard chucking reamer for use in drill presses, knee mills, and CNC machining centers equipped with drill chucks or collet holders that accept a straight-cylindrical shank in the 0.2500 to 0.2999-inch diameter range.

Installation Notes

Chucking reamers should be installed by a qualified machinist. Always power down and lock out the machine spindle before securing or removing the reamer from the chuck or collet. Use an appropriate cutting fluid for the work material to extend tool life and achieve optimal bore finish. Avoid hand-rotating the reamer in reverse, as back-dragging dulls cutting edges rapidly.