Hertel 72297104 Chucking Reamer Letter J Hss 6 Flute

Product Description

The HERTEL 72297104 is a high-speed steel (HSS) chucking reamer in Letter J size, designed to finish-ream drilled or bored holes to a precise 0.2770-inch diameter. With a 6-flute spiral configuration and right-hand spiral direction, it produces smooth bore surfaces and accurate tolerances in a single pass. The straight-cylindrical shank seats securely in a standard drill chuck or collet. At 4.125 inches overall length with a 1.5-inch flute length, this reamer is well-suited for through-holes and shallow blind holes in production and maintenance environments. Machinists and toolroom professionals use it on manual lathes, drill presses, and CNC equipment.

This chucking reamer is intended for use in metalworking applications where hole-finishing accuracy is required. It falls within the 0.2500- to 0.2999-inch reamer diameter range, making it appropriate for Letter J hole sizes in ferrous and non-ferrous materials. Typical applications include fitting dowel pins, bearing bores, and precision shaft fits in job shop, maintenance, and light manufacturing settings. The HSS construction handles a broad range of workpiece materials at moderate cutting speeds without requiring carbide tooling.

Key Features

• 0.2770-inch cutting diameter — Letter J size for precise hole finishing
• 6-flute spiral design with right-hand spiral for smooth surface finish and chip evacuation
• HSS construction provides toughness and re-sharpenability across a wide range of materials
• Straight-cylindrical shank compatible with standard drill chucks and collet holders
• 1.5-inch flute length suits through-holes and moderate-depth blind holes
• UNSPSC Code 23241611 for procurement system compatibility

Compatibility

Designed as an OEM-style replacement and standard chucking reamer for metalworking machines accepting a straight-cylindrical shank in the 0.2500- to 0.2999-inch diameter range, including drill presses, lathes, and CNC machining centers equipped with standard drill chucks or collet systems.

Installation Notes

Chucking reamers are installed and removed by qualified machinists following standard toolroom safety practices. Secure the shank fully in the chuck or collet and verify runout before cutting. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve finish. Never use a reamer to remove more stock than the tool is rated for — pre-drill or bore the hole to within the recommended reaming allowance before engaging the reamer.