Hertel 79890745 Chucking Reamer Size 39 Solid Carbide

Product Description

The HERTEL 79890745 is a solid carbide chucking reamer in wire gauge size 39, producing a finished hole diameter of 0.0995 inches with a tight tolerance of 0.0000 to 0.0002 inches. Built from solid carbide with a bright, uncoated finish, this reamer delivers the rigidity and edge retention required for precise hole finishing in hard or abrasive materials. The straight-cylindrical shank seats securely in standard drill chucks or collets. With an overall length of 2.25 inches and a flute length of 0.625 inches, it is sized for short-reach applications where control and dimensional accuracy are critical. Machinists and toolroom technicians rely on this type of reamer for production and maintenance work.

This reamer is suited for finishing drilled or bored holes in metalworking applications where a close-tolerance wire-size bore is required. Its four-flute straight configuration handles through-holes and shallow blind holes in ferrous and non-ferrous metals. The right-hand cutting direction is standard for conventional CNC machining centers, drill presses, and manual lathes. Typical applications include precision assembly bores, dowel pin holes, and clearance fits in industrial manufacturing and toolroom environments.

Key Features

• Wire gauge size 39 with a finished diameter of 0.0995 inches
• Diameter tolerance of 0.0000 to 0.0002 inches for close-tolerance hole finishing
• Solid carbide construction for edge retention in hard and abrasive materials
• Four straight flutes with bright, uncoated finish
• Straight-cylindrical shank for standard chuck or collet mounting
• Right-hand cut, compatible with conventional machine spindle rotation

Compatibility

Designed as a standard chucking reamer for use in CNC machining centers, drill presses, and lathes equipped with drill chucks or collets accepting a straight-cylindrical shank in the corresponding diameter range.

Installation Notes

Installation and use of this reamer should be performed by qualified machinists familiar with rotating cutting tool safety. Ensure the machine spindle is fully stopped and locked out before mounting or removing the tool. Seat the shank fully and securely in the chuck or collet before operation. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain bore quality.