Hertel 72034457 Chucking Reamer 0.445 in Hss 6 Flute

Product Description

The HERTEL 72034457 is a straight-flute chucking reamer designed for precision hole finishing in metal and composite materials. Built from high-speed steel (HSS) with a bright, uncoated finish, it delivers consistent sizing and smooth surface finish in production and job-shop environments. The reamer measures 0.4450 inches in diameter with a 7-inch overall length and a 1.75-inch flute length. Its straight-cylindrical shank seats securely in standard drill chucks and collet holders. Six right-hand cutting flutes distribute cutting load evenly and help control chip evacuation during through-hole and blind-hole finishing operations.

This chucking reamer is suited for machine-shop and maintenance applications where bore tolerances require a final finishing pass after drilling. Typical use cases include CNC lathes, drill presses, and milling-machine setups where a 0.4450-inch finished bore is required. It is appropriate for ferrous metals, non-ferrous alloys, and similar machinable materials. Licensed machinists and toolroom technicians are the primary users. The straight-flute geometry makes it a reliable choice for through-holes and interrupted cuts where flute direction is less critical.

Key Features

• 0.4450-inch diameter for precision bore finishing within the 0.4000-0.4999 inch range
• High-speed steel (HSS) construction provides durability across a broad range of machinable materials
• Bright, uncoated finish — ready to use out of the package with no coating to chip or flake
• 6 straight flutes with right-hand cutting direction for smooth, consistent material removal
• Straight-cylindrical shank compatible with standard drill chucks and collet systems
• 7-inch overall length with 1.75-inch flute length suited for typical depth-of-cut requirements

Compatibility

Designed as a standard chucking reamer for use in drill presses, lathes, and milling machines equipped with a drill chuck or collet holder sized for a straight-cylindrical shank. No specific model compatibility was provided by the manufacturer for this part.

Installation Notes

Installation and operation should be performed by qualified machinists or toolroom personnel. Secure the straight-cylindrical shank firmly in the chuck or collet before operation and verify runout before cutting. Always ream at appropriate speeds and feeds for the workpiece material — reaming RPM is typically lower than drilling RPM for the same diameter. Do not use this reamer as a primary drilling tool; always pre-drill or bore the hole to within a few thousandths of the finished diameter before reaming.