Hertel 72034085 Chucking Reamer 0.4080 in 6 Flute Hss

Product Description

The HERTEL 72034085 is a straight-flute chucking reamer designed for precision hole finishing in machine shop and production environments. Built from high-speed steel (HSS) with a bright, uncoated finish, it delivers a reamed diameter of 0.4080 inches with a 7-inch overall length and a 1.75-inch flute length. The straight-cylindrical shank seats securely in standard drill chucks and collet holders. With 6 flutes and right-hand cutting direction, this reamer produces smooth, accurate bores in ferrous and non-ferrous materials. It is a standard-size reamer, not an over/under size or dowel pin variant.

This reamer is suited for drilling and machining operations that require tight-tolerance hole finishing. Machinists and tool-and-die professionals reach for this style when finish-reaming drilled or bored holes to close dimensional tolerances in production runs, job shop work, or maintenance machining. The 7-inch OAL provides clearance for reaching into deeper setups while the 6-flute geometry balances material removal with surface finish quality in materials such as steel, cast iron, aluminum, and brass.

Key Features

• 0.4080-inch reamed diameter for precise hole finishing
• High-speed steel (HSS) construction for durability across a range of workpiece materials
• 6 straight flutes with right-hand cutting direction
• Bright, uncoated finish — no coating to affect dimensional tolerances
• Straight-cylindrical shank for compatibility with standard drill chucks and collet holders
• Standard size reamer — not an over/under or dowel pin configuration

Compatibility

Designed as a standard straight-shank chucking reamer for use in drill presses, lathes, CNC machining centers, and manual mills equipped with a drill chuck or straight-bore collet holder accepting a straight-cylindrical shank.

Installation Notes

Chucking reamers are installed and operated by machinists following standard machine tool lockout and workholding procedures. Ensure the machine spindle is fully stopped and locked out before changing tooling. Secure the shank fully in the chuck or collet to the manufacturer-recommended engagement depth, and verify runout before cutting. Use appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish.