Hertel 79890273 Chucking Reamer 17/64 in Solid Carbide

Product Description

The HERTEL 79890273 is a solid carbide chucking reamer designed to finish-ream drilled holes to precise tolerances in machine shop and production environments. With a 17/64 inch (0.2656 inch decimal) diameter and a diameter tolerance of 0.0000 to 0.0003 inches, this reamer delivers consistent, accurate bore sizing in a single pass. The straight flute geometry and right-hand cutting direction make it well suited for through-hole reaming in a range of ferrous and non-ferrous materials. Solid carbide construction provides rigidity and wear resistance compared to high-speed steel alternatives. Machinists and tool-and-die professionals are the primary users of this type of precision reamer.

This chucking reamer is intended for use in CNC machining centers, manual mills, and drill presses where a straight cylindrical shank can be gripped in a drill chuck, collet, or floating reamer holder. The 1-1/8 inch flute length accommodates typical hole depths for this diameter class, while the 3-1/4 inch overall length provides adequate clearance for most standard setups. It is appropriate for production reaming applications where hole-location accuracy and surface finish are critical requirements.

Key Features

• Solid carbide construction for superior wear resistance and rigidity
• 17/64 inch diameter with a tight tolerance of 0.0000 to 0.0003 inches for precise hole sizing
• 6-flute straight design promotes smooth cutting action and consistent chip evacuation
• Bright/uncoated finish suitable for use with a wide range of cutting fluids and materials
• Straight cylindrical shank compatible with standard drill chucks and collet holders
• Right-hand cutting direction for conventional machine spindle operation

Compatibility

Designed as an OEM-style replacement or direct-application chucking reamer for machine tools accepting a straight cylindrical shank in the 17/64 inch diameter class.

Installation Notes

This reamer should be installed by a qualified machinist following standard toolroom practices. Ensure the machine spindle is fully stopped and locked out before inserting or removing the tool from the holder. Use an appropriate cutting fluid for the workpiece material to extend tool life and achieve the specified surface finish. Avoid using this reamer as a drill; it is designed only for finish-reaming pre-drilled or bored holes.