Hertel 72009400 Chucking Reamer 0.094 in Hss 4 Flute

Product Description

The HERTEL 72009400 is a straight-flute chucking reamer designed for precision hole finishing in metal and similar materials. Built from high-speed steel (HSS) with a bright, uncoated finish, this reamer holds a nominal diameter of 0.0940 inches and delivers clean, accurate bores in a single pass. The straight-cylindrical shank seats firmly in standard drill chucks or collet holders. With a 3-inch overall length (OAL) and a 3/4-inch flute length, it is sized for shallow-to-moderate depth reaming operations in production and maintenance environments. Right-hand cutting direction is standard for conventional CNC and manual machine tool setups.

This reamer is suited for machine shop, toolroom, and production floor applications where close-tolerance hole finishing at small diameters is required. The 0.0940-inch diameter falls within the 0.0500 to 0.0999-inch decimal inch reamer range, making it appropriate for precision pilot holes, pin bores, and dowel-fit operations. It is intended for use by machinists and toolroom technicians operating drill presses, lathes, CNC machining centers, or manual milling machines.

Key Features

• 0.0940-inch nominal reaming diameter for tight-tolerance small-bore finishing
• High-speed steel (HSS) construction for durability across a range of ferrous and non-ferrous materials
• 4-flute straight-flute geometry for consistent chip evacuation and smooth bore finish
• Right-hand cutting direction compatible with standard machine tool spindle rotation
• Straight-cylindrical shank for secure seating in drill chucks and collet holders
• Bright, uncoated finish — no coating buildup to affect diameter tolerance

Compatibility

Designed as a standard chucking reamer for use in drill presses, lathes, CNC machining centers, and milling machines that accept straight-cylindrical shank tooling in the applicable size range.

Installation Notes

Installation is performed by a machinist or toolroom technician. Secure the straight-cylindrical shank firmly in a drill chuck or collet holder before operation; verify runout before cutting to protect bore tolerance. Always bring the spindle to a complete stop and follow machine-specific lockout procedures before changing or inspecting tooling. Apply cutting fluid appropriate for the workpiece material to extend tool life and improve surface finish.