Hertel 72296668 Chucking Reamer 0.4365 in Hss 6 Flute

Product Description

The HERTEL 72296668 is a high-speed steel (HSS) chucking reamer designed for precision hole finishing in metalworking applications. With a reamer diameter of 0.4365 inches and an overall length of 5.5 inches, this tool removes minimal material to bring a drilled or bored hole to a close-tolerance final diameter. The straight-cylindrical shank seats in standard drill chucks or collet holders. Six spiral flutes with a right-hand cutting direction provide smooth material removal and consistent surface finish. This reamer is an over/under size tool, meaning it produces a hole that may be intentionally above or below nominal for press-fit, interference-fit, or bushing-installation work. Machinists, tool-and-die technicians, and maintenance mechanics are the primary users.

This reamer is suited for manual machining centers, lathes, drill presses, and CNC operations requiring a chucking-style tool. It handles through-hole and blind-hole finishing in ferrous and non-ferrous metals where a drilled hole needs to be trued up to a precise finished diameter. The 1.75-inch flute length accommodates typical stock thicknesses encountered in general machining and maintenance repair operations. The bright, uncoated finish makes it straightforward to inspect for wear and to re-sharpen when the cutting edges dull.

Key Features

• 0.4365-inch reamer diameter for close-tolerance hole finishing
• HSS construction provides toughness and re-sharpenability
• 6 spiral flutes, right-hand cutting direction for smooth chip evacuation
• Straight-cylindrical shank for compatibility with standard drill chucks and collet holders
• Over/under size designation — suitable for interference-fit and bushing-installation applications
• Bright, uncoated finish for easy inspection and field re-sharpening

Compatibility

Designed as a chucking reamer for use in standard drill chucks and collet-style toolholders on lathes, drill presses, and machining centers that accept a straight-cylindrical shank in the 0.4365-inch diameter range.

Installation Notes

This tool is installed and operated by machinists and maintenance technicians using standard machine tool practices. Secure the shank fully in the chuck or collet before use and verify runout before cutting. Always pre-drill or bore the hole to an appropriate undersize before reaming — do not use this tool as a primary hole-making drill. Follow all machine guarding requirements and use cutting fluid appropriate to the workpiece material to extend tool life and improve surface finish.