Hertel 4599791 Chucking Reamer 4.00mm Cobalt Steel

Product Description

The HERTEL 4599791 is a straight-flute chucking reamer designed for precision hole finishing in metal workpieces. Built from cobalt steel with a bright, uncoated finish, this reamer holds a 4.00mm (0.1575 inch) cutting diameter and delivers right-hand cutting action through a straight-cylindrical shank. It measures 4 inches overall length with a 1-inch flute length, making it well-suited for moderate-depth reaming operations on the mill or drill press. Machinists and tool-and-die professionals reach for cobalt steel reamers when working harder alloys where high-speed steel lacks sufficient heat resistance.

This chucking reamer fits standard machine tool applications requiring tight hole tolerances in the 4.00mm diameter range. It is intended for use in CNC machining centers, manual mills, or drill presses with a compatible collet or chuck setup. The straight-cylindrical shank seats securely in standard ER collets and drill chucks, supporting repeatable setups in production and job-shop environments alike. It is not configured as an over/under-size or dowel-pin reamer, making it appropriate for standard nominal-diameter finishing work.

Key Features

• Cobalt steel construction provides improved heat and wear resistance over standard HSS
• Straight flute geometry delivers clean, consistent chip clearance in through-hole applications
• Right-hand cutting direction compatible with standard spindle rotation
• Bright, uncoated finish suitable for use with cutting fluid in ferrous and non-ferrous materials
• Straight-cylindrical shank fits ER collets and standard drill chucks without adapters

Compatibility

Designed as an OEM-style machine reamer for use in standard chucking applications requiring a 4.00mm nominal hole diameter finish.

Installation Notes

This reamer is installed by a machinist or toolroom technician in a mill, lathe, or drill press with an appropriate collet or chuck. Always bring the machine to a full stop and confirm zero spindle rotation before mounting or removing the tool. Apply cutting fluid appropriate to the workpiece material to extend tool life and improve surface finish. Do not use this tool for stock removal beyond its intended finishing allowance, as overloading a reamer will accelerate edge wear and compromise hole tolerance.