Hertel 79890786 Chucking Reamer Wire 43 Solid Carbide

Product Description

The HERTEL 79890786 is a solid carbide chucking reamer designed for precision hole finishing in metalworking and machining applications. Ground to a wire gauge No. 43 diameter of 0.0890 inches, it holds a tight tolerance of 0.0000 to 0.0002 inches, making it suitable for close-tolerance bore work where accuracy is critical. The 4-flute straight geometry and bright uncoated finish are standard for this type of carbide reamer, which is typically run in CNC machining centers, drill presses, and manual lathes equipped with collet or drill chucks. Machinists and toolroom technicians are the primary installers of this tool.

This reamer is used in production and toolroom environments where small-diameter, tight-tolerance holes are required in ferrous and non-ferrous materials. With an overall length of 2 inches and a flute length of 0.5 inches, it is suited for shallow through-holes and short blind bores. The straight cylindrical shank allows direct clamping in standard collets and drill chucks. Applications include instrument manufacturing, aerospace component machining, and general precision metalwork where wire-gauge hole sizes are specified.

Key Features

• Wire gauge No. 43 diameter: 0.0890 inches with tolerance of 0.0000 to 0.0002 inches
• Solid carbide construction for hardness and wear resistance in precision reaming
• 4-flute straight design for consistent chip evacuation in short-flute applications
• Bright uncoated finish suitable for use with cutting fluids in a range of workpiece materials
• Straight cylindrical shank for secure clamping in collets and drill chucks
• Right-hand cutting direction, standard for conventional reaming operations

Compatibility

Designed as a standard wire-gauge chucking reamer for use in CNC machining centers, drill presses, and lathes equipped with collet chucks or drill chucks that accept a straight cylindrical shank at this diameter class.

Installation Notes

Installation and use of this tool should be performed by a qualified machinist or toolroom technician familiar with reaming practices. Ensure the spindle and workpiece are properly secured and that the machine is at a complete stop before mounting or removing the tool from its holder. Apply an appropriate cutting fluid or coolant for the workpiece material to extend tool life and maintain dimensional accuracy. Do not use this reamer to remove excessive stock; pre-drill or bore the hole to within the recommended reaming allowance before use.