Hertel 72401987 Taper Pin Reamer 3/0 Hss 4 Flutes

Product Description

The HERTEL 72401987 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 spiral flute geometry with right-hand cutting direction and left-hand spiral direction. It measures 2.3125 inches overall length with a 1.3125-inch flute length and a 9/64-inch (0.1406-inch) square shank. The taper rate is 1:48, consistent with standard taper pin sizing. This tool is intended for use by machinists, tool and die makers, and maintenance technicians working with precision mechanical assemblies.

This reamer is suited for general-purpose hole finishing operations on taper pin holes in shafts, collars, and mechanical components. It is sized for the 3/0 taper pin standard, with a small end diameter of 0.1029 inches and a large end diameter of 0.1302 inches. Typical applications include production machining, repair shops, and maintenance environments where precise taper pin fit and alignment are required. The four-flute spiral design provides smooth cutting action and good chip evacuation in both ferrous and non-ferrous materials.

Key Features

• High-speed steel construction for durability in general-purpose machining applications
• Spiral flute design with left-hand spiral and right-hand cut for smooth material removal
• 1:48 taper rate matches standard taper pin specifications for 3/0 pin size
• Square shank (9/64 inch) provides positive drive and secure chuck engagement
• Bright, uncoated finish suitable for use with cutting fluids in a variety of materials
• Four flutes for balanced cutting and consistent hole finish

Compatibility

Designed for use in standard 3/0 taper pin holes with a small end diameter of 0.1029 inches and a large end diameter of 0.1302 inches, following the 1:48 taper pin standard.

Installation Notes

Taper pin reamers are typically used by machinists and maintenance technicians operating drill presses, milling machines, or hand-held power tools with appropriate chucks for square shank tooling. Secure the workpiece firmly before reaming and apply a suitable cutting fluid to extend tool life and improve hole finish. Advance the reamer gradually and avoid excessive feed pressure, which can cause chatter or oversize the hole. Always verify hole size with the appropriate taper pin gauge before pressing or driving the final pin.