Hertel 72551864 Chucking Reamer 0.1865in Cobalt Steel 6 Flute

Product Description

The HERTEL 72551864 is a cobalt steel chucking reamer designed to produce accurate, finished holes in metal workpieces. The reamer measures 0.1865 inches in diameter with an overall length of 4.5 inches and a flute length of 1.125 inches. It features 6 straight flutes with a right-hand cutting direction and a bright, uncoated finish. The straight-cylindrical shank allows secure clamping in standard drill chucks and collets. Cobalt steel construction provides superior heat and wear resistance compared to standard high-speed steel, making it well-suited for harder ferrous materials. Machinists and tool and die professionals install this reamer to bring drilled or bored holes to a precise final diameter.

This chucking reamer is used in machine shop environments for finishing holes in steel, cast iron, and similar ferrous workpieces. It is classified as an over or under size reamer, giving the user control over final hole tolerance. The 0.1865-inch diameter places it in the 0.1500 to 0.1999 inch reamer diameter range. Typical applications include production machining, tool and die work, and maintenance repair operations where hole geometry and surface finish are critical to fit and function.

Key Features

• Cobalt steel construction for improved heat resistance and longer tool life in harder materials
• 6 straight flutes with right-hand cutting direction for smooth, consistent material removal
• Bright uncoated finish suitable for use with standard cutting fluids
• Straight-cylindrical shank for secure clamping in drill chucks or collets
• Classified as an over or under size reamer for controlled final hole tolerance
• 0.1865-inch diameter within the 0.1500 to 0.1999 inch range

Compatibility

Designed as a standard chucking reamer for use in manual or CNC machine tools equipped with a compatible chuck or collet accepting a straight-cylindrical shank of appropriate size.

Installation Notes

This reamer is installed and operated by machinists or tool and die technicians on lathes, drill presses, or CNC machining centers. Ensure the workpiece is securely fixtured and the machine spindle is properly aligned before reaming to avoid bell-mouthing or taper in the finished hole. Always use an appropriate cutting fluid for the workpiece material to reduce heat buildup and extend tool life. Inspect the shank seating in the chuck or collet before operation to confirm concentric runout is within acceptable limits.