Hertel 72300049 Chucking Reamer 1/16 in Cobalt Steel

Product Description

The HERTEL 72300049 is a chucking reamer designed to bring drilled or bored holes to a precise finished diameter. Built from cobalt steel with a bright uncoated finish, this reamer delivers durability in tough materials including stainless steel and heat-resistant alloys where high-speed steel tools lose their edge. It features four straight flutes, a right-hand cutting direction, and a straight-cylindrical shank for secure seating in standard drill chucks or collets. The 1/16 inch (0.0625 inch) cutting diameter, 1/2 inch flute length, and 2-1/2 inch overall length make it suited for small-diameter finish reaming on precision components in metalworking and machining environments.

This reamer is used in machine shop and production environments where hole tolerances require a finish pass after drilling. It fits standard machine chucks and collets and is run in CNC machining centers, drill presses, and manual lathes. Typical applications include finish reaming of small pilot holes, pin holes, and precision-fit bores in metal parts. The cobalt steel construction supports use in harder workpiece materials that would wear conventional HSS reamers prematurely. Installation and operation are performed by machinists and tool-and-die professionals following standard shop practices.

Key Features

• Cobalt steel construction for extended tool life in hard and abrasive materials
• Four straight flutes for smooth, consistent material removal on finish passes
• Right-hand cutting direction compatible with standard machine spindle rotation
• Straight-cylindrical shank seats securely in drill chucks and collets without slippage
• Bright uncoated finish suitable for use with standard cutting fluids
• Small 1/16 inch diameter for precise finish reaming of tight-tolerance small bores

Compatibility

Designed as a standard chucking reamer for use in drill chucks and collet holders accepting a straight-cylindrical shank at 1/16 inch diameter across CNC machining centers, drill presses, and manual lathes.

Installation Notes

Chucking reamers are installed and operated by machinists following standard machine tool practices. Secure the straight-cylindrical shank firmly in a properly sized chuck or collet before operation, and verify concentricity to avoid chatter and premature wear. Always apply an appropriate cutting fluid for the workpiece material to extend tool life and achieve the target surface finish. Never use a reamer to remove excessive stock — drilling to near-final size before reaming is standard practice.