Hertel 72402944 Taper Pin Reamer 7/0 Hss 2 Flute

Product Description

The HERTEL 72402944 is a taper pin reamer designed for enlarging, finishing, and shaping tapered holes to accept standard taper pins. Manufactured from high-speed steel with a bright, uncoated finish, this reamer features a helical flute geometry with a right-hand cutting direction and left-hand spiral. It has a small end diameter of 0.0497 inches and a large end diameter of 0.0666 inches, corresponding to a No. 7/0 taper pin size with a 1:48 taper rate. Machinists and toolroom technicians install this reamer using a standard hand-reaming handle or machine spindle for precision hole sizing in metal components.

This reamer is suited for general-purpose taper pin hole finishing in manufacturing, maintenance, and repair applications. The 7/0 size targets small, precision assemblies where accurate taper fits are required, such as pin-retained shafts, levers, and mechanical linkages. With a 13/16-inch flute length and an overall length of 1-13/16 inches, it fits standard toolholders and handles used in bench or light machine work. The 5/64-inch straight shank provides a secure grip in collets and drill chucks.

Key Features

• No. 7/0 taper pin size with a 1:48 taper rate for standard taper pin fitment
• High-speed steel construction for general-purpose cutting in ferrous and non-ferrous materials
• Helical flute geometry with left-hand spiral and right-hand cutting direction for smooth chip evacuation
• Bright, uncoated finish suitable for use with cutting fluids in light-duty applications
• Two-flute design provides good chip clearance in small-diameter reaming operations
• Straight shank diameter of 5/64 inches for compatibility with standard collets and chucks

Compatibility

Designed as an OEM-style general-purpose taper pin reamer for use in standard hand-reaming handles, drill presses, or milling machine spindles where a No. 7/0 taper pin fit is required.

Installation Notes

This tool is installed and operated by machinists or toolroom technicians. Power down and lock out any machine spindle before securing or changing the reamer in the toolholder. Apply an appropriate cutting fluid to extend tool life and improve finish quality. Do not force the reamer through undersize stock in a single pass; step up progressively to final taper pin size to avoid tool deflection or breakage.