Hertel 72290034 Chucking Reamer No.3 Hss 6 Flute

Product Description

The HERTEL 72290034 is a high-speed steel (HSS) chucking reamer designed to finish-ream holes to a precise No. 3 wire gauge diameter of 0.2130 inches. Built with 6 straight flutes and a right-hand cutting direction, it removes stock evenly and produces smooth, close-tolerance bores in a wide range of metals. The bright, uncoated finish makes it a reliable general-purpose tool for job shops, maintenance departments, and production environments. Overall length is 3.75 inches with a 1.25-inch flute length, sized for use in manual or CNC drilling setups. Machinists and toolroom technicians are the primary users of this type of precision reamer.

This reamer is suited for through-hole and blind-hole finishing operations on ferrous and non-ferrous materials in both manual and machine-tool applications. The straight-cylindrical shank seats directly in standard drill chucks, collet chucks, or floating reamer holders. Typical use cases include hole sizing in fixture work, jig boring, and production machining where hole diameter tolerance and surface finish are critical. The 0.2130-inch diameter falls within the 0.2000 to 0.2499 decimal inch range category.

Key Features

• No. 3 wire size diameter: 0.2130 inches for precise hole finishing
• High-speed steel construction provides durability across a broad range of workpiece materials
• 6 straight flutes with right-hand cutting for smooth stock removal and consistent surface finish
• Straight-cylindrical shank fits standard drill chucks and collet holders without adapters
• Bright, uncoated finish suitable for general-purpose machining applications
• Compact 3.75-inch overall length for use in confined setups or short-reach applications

Compatibility

Designed as a standard chucking reamer for use in drill presses, lathes, milling machines, and CNC machining centers equipped with drill chucks or collet systems accepting a straight-cylindrical shank in the No. 3 wire size class.

Installation Notes

Chucking reamers should be installed and operated by qualified machinists familiar with proper speeds, feeds, and cutting fluid selection for reaming operations. Always secure the shank fully in the chuck or collet before operation and confirm runout is within acceptable limits. Power down and lock out the machine before changing or inspecting tooling. Do not use a chucking reamer to remove excessive stock; pre-drill or bore the hole to near-final size before reaming.