Hertel 79890810 Chucking Reamer 47 Solid Carbide

Product Description

The HERTEL 79890810 is a solid carbide chucking reamer designed for precision hole finishing in machine tool applications. Built to wire size 47, it produces a reamed diameter of 0.0785 inches with a tight tolerance of 0.0000 to 0.0002 inches, making it well suited for close-tolerance bore work in metal components. The straight flute geometry and bright uncoated finish are standard for this class of small-diameter carbide reamer. With an overall length of 1.75 inches and a flute length of 0.5 inches, this tool fits standard drill chucks and collet holders. Machinists and tool room technicians are the primary users.

This reamer is used in machine shop, tool room, and production environments where small-diameter holes require tight dimensional control. It performs in a variety of workpiece materials where solid carbide tooling is appropriate, including cast iron, hardened steel, and non-ferrous alloys. The straight cylindrical shank accepts standard drill chucks, ER collets, and similar holders commonly found on drill presses, CNC machining centers, and manual mills. It is sold individually and is suited for low-volume precision work as well as repeat production operations requiring consistent hole size.

Key Features

• Wire size 47 diameter of 0.0785 inches for precise small-bore finishing
• Diameter tolerance of 0.0000 to 0.0002 inches for close-fit applications
• Solid carbide construction for rigidity and wear resistance
• 4-flute straight flute design for smooth cutting action
• Bright uncoated finish suitable for a range of workpiece materials
• Straight cylindrical shank for compatibility with standard chucks and collets

Compatibility

Designed as a standard chucking reamer for use in drill chucks, ER collet systems, and similar straight-shank toolholders on drill presses, machining centers, and manual mills requiring wire size 47 bore finishing.

Installation Notes

Installation and use should be performed by a qualified machinist or tool room technician. Ensure the machine spindle is fully stopped and locked out before inserting or removing the reamer from the holder. Verify runout of the toolholder before operation, as excessive runout will negatively affect hole tolerance. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain surface finish quality.