Hertel 72294424 Chucking Reamer Size 42 Hss

Product Description

The HERTEL 72294424 is a wire-gauge chucking reamer designed for precision hole finishing in metal and similar materials. Built from high-speed steel (HSS) with a bright, uncoated finish, it removes a controlled amount of material to bring a drilled hole to an accurate finished diameter. The reamer is sized to wire gauge No. 42, corresponding to a decimal diameter of 0.0935 inches. It features 4 right-hand spiral flutes and a straight-cylindrical shank for secure chuck retention in drill presses, lathes, and CNC equipment. Overall length is 2.25 inches with a flute length of 0.75 inches. Machinists, tool and die makers, and precision fabricators are the primary users.

This chucking reamer is suited for small-diameter hole finishing operations in production and job-shop environments. It performs well in ferrous and non-ferrous metals where tight hole tolerances are required. The straight-cylindrical shank allows direct chucking in standard Jacobs-style or collet chucks without adapters. Its compact overall length makes it practical for applications where clearance is limited. Right-hand cutting direction matches conventional spindle rotation on most machine tools.

Key Features

• Wire gauge No. 42 sizing with a decimal diameter of 0.0935 inches for precise small-hole finishing
• HSS construction provides good wear resistance and toughness across common workpiece materials
• 4 right-hand spiral flutes promote smooth cutting action and efficient chip evacuation
• Straight-cylindrical shank seats securely in standard drill chucks and collet holders
• Bright, uncoated finish — suitable for general-purpose machining without coating-related dimensional offset
• Right-hand cutting direction compatible with standard machine spindle rotation

Compatibility

Designed as a standard wire-gauge chucking reamer for use in drill presses, engine lathes, turret lathes, and CNC machining centers equipped with a chuck or collet capable of holding a straight-cylindrical shank at this diameter range.

Installation Notes

Installation and use should be performed by a qualified machinist or tooling technician. Power down and lock out the machine spindle before installing or removing the reamer from the chuck. Ensure the shank is fully seated and the chuck is tightened uniformly to prevent runout. Always operate at a cutting speed and feed rate appropriate for the workpiece material and reamer diameter — consult standard machining data references for HSS reamer parameters.