Hertel 79890117 Chucking Reamer 0.4995 in Solid Carbide

Product Description

The HERTEL 79890117 is a solid carbide chucking reamer designed for precision hole finishing in machining applications. With a reamer diameter of 0.4995 inches and a diameter tolerance of 0.0000 to 0.0003 inches, it delivers tight, repeatable sizing suited for dowel pin fits and close-tolerance bores. The 4-inch overall length and 1.5-inch flute length make it practical for general-purpose chuck-mounted reaming on manual lathes, mills, and CNC machining centers. A bright, uncoated finish is standard. Right-hand cutting direction. This tool is typically installed and used by machinists and tool-and-die professionals working in production or job-shop environments.

This reamer is suited for finishing pre-drilled or bored holes to a precise diameter in ferrous and non-ferrous materials. The straight flute geometry and straight cylindrical shank allow straightforward setup in standard chucks or collets. The 0.4995-inch diameter designates it as a dowel pin reamer, matched to 0.4995 D/P sizing. It is appropriate for applications where hole roundness, straightness, and surface finish are critical, such as fixture building, die work, and precision assembly operations.

Key Features

• Solid carbide construction for wear resistance and dimensional stability
• 0.4995-inch diameter with 0.0000 to 0.0003-inch tolerance for close-tolerance dowel pin fits
• 6-flute straight design promotes consistent chip evacuation and smooth bore finish
• Straight cylindrical shank compatible with standard chucks and collet holders
• Bright, uncoated finish suitable for a wide range of workpiece materials
• Right-hand cutting direction for conventional spindle rotation

Compatibility

Designed as an OEM-style chucking reamer for use in manual or CNC lathes, knee mills, and machining centers equipped with standard chuck or collet toolholding systems accepting a straight cylindrical shank.

Installation Notes

Installation is performed by machinists using a standard chuck or precision collet. Ensure the shank is fully seated and concentric before operation to avoid bellmouthing or oversizing the bore. The workpiece hole should be pre-drilled or bored to the appropriate undersize before reaming. Follow shop-standard speeds and feeds for solid carbide reamers based on workpiece material; do not use cutting parameters intended for high-speed steel tooling.