Hertel 72034333 Chucking Reamer 0.4330 in Hss 6 Flute

Product Description

The HERTEL 72034333 is a straight-flute chucking reamer designed to bring bored or drilled holes to a precise finished diameter. Built from high-speed steel (HSS) with a bright, uncoated finish, this reamer delivers consistent sizing in ferrous and non-ferrous materials across general machining applications. The 6-flute, right-hand cutting geometry produces smooth hole walls and accurate tolerances. At 0.4330 inches in diameter with a 7-inch overall length and a 1.75-inch flute length, it fits standard drill chucks and collet holders with a straight-cylindrical shank. Machinists and tool-room technicians install this reamer as a finishing step after rough boring or drilling to achieve tight dimensional control.

This chucking reamer is suited for machine shop, production floor, and maintenance environments where repeatable hole sizing is required. The straight-cylindrical shank allows mounting in drill press chucks, CNC machining centers, manual mills, or turret lathes. The 0.4330-inch diameter falls within the 0.4000 to 0.4999 decimal inch reamer range, making it appropriate for finishing holes that require close tolerance fits such as dowel pin bores, bearing seat preparations, and precision assembly alignments where a standard drill leaves insufficient accuracy.

Key Features

• 0.4330-inch finished diameter for precise hole sizing in the 0.4000 to 0.4999 decimal inch range
• HSS construction provides durability and resistance to wear across a broad range of workpiece materials
• 6-flute straight geometry promotes smooth cutting action and consistent surface finish
• Right-hand cutting direction compatible with standard machine spindle rotation
• Straight-cylindrical shank mounts directly in drill chucks, collets, and standard holders
• Bright, uncoated finish suitable for use with cutting fluids across multiple material types

Compatibility

Designed as a general-purpose chucking reamer for use in any machine tool capable of accepting a straight-cylindrical shank, including drill presses, mills, lathes, and CNC machining centers that accommodate the 0.4330-inch diameter range.

Installation Notes

A qualified machinist should secure the shank firmly in a drill chuck or collet before operation and verify runout with a dial indicator to avoid oversizing the bore. Power down and lock out the machine spindle before inserting or removing the reamer. Use an appropriate cutting fluid matched to the workpiece material to extend tool life and improve surface finish. Never force the reamer into an undersized hole; ensure the pre-drilled or bored hole is within the recommended undersize allowance for the finish diameter required.