Hertel 79891032 Chucking Reamer Letter F Solid Carbide

Product Description

The HERTEL 79891032 is a solid carbide chucking reamer sized to Letter F (0.2570 inches diameter) for precision hole finishing in machining applications. Built from solid carbide with a bright, uncoated finish, it delivers tight diameter tolerances of 0.0000 to 0.0003 inches, making it suitable for work requiring close-fit holes. The straight flute geometry and right-hand cutting direction produce clean, accurate bores in a single pass. With an overall length of 3.25 inches and a flute length of 1.125 inches, it fits standard chucking setups on CNC machines, manual mills, and drill presses. Machinists and tool and die professionals are the primary installers of this tool.

This reamer is used in production and job-shop environments where holes must be brought to a precise final diameter after drilling. It is well suited for ferrous and non-ferrous metals where dimensional accuracy and surface finish are critical. The straight-cylindrical shank allows direct mounting in standard chucks or collets. Applications include fixture plates, bearing bores, dowel pin holes, and any work requiring a Letter F diameter finish reamed to tolerance.

Key Features

• Solid carbide construction for wear resistance and dimensional stability
• Letter F diameter (0.2570 inches) with tolerance of 0.0000 to 0.0003 inches
• 6-flute straight design for smooth cutting action and accurate bore geometry
• Right-hand cutting direction, standard for conventional reaming operations
• Bright, uncoated finish suitable for a wide range of workpiece materials
• Straight-cylindrical shank for use in chucks or collets without adapter

Compatibility

Designed as a standard chucking reamer for use in any machine tool equipped with a chuck or collet capable of accepting a straight-cylindrical shank at the Letter F diameter range.

Installation Notes

Chucking reamers are installed by machinists in milling machines, drill presses, or CNC machining centers. Ensure the workpiece and spindle are properly secured before operation and confirm the pre-drilled hole is sized correctly to leave the appropriate stock for reaming. Use appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish. Never run a chucking reamer in reverse, as this will damage the cutting edges.