Value Collection SM25N03 Taper Pin Reamer No. 3 Hss

Product Description

The VALUE COLLECTION SM25N03 is a No. 3 taper pin reamer designed for enlarging, finishing, and shaping tapered holes to accept standard taper pins. Constructed from high-speed steel with a bright, uncoated finish, this reamer features a spiral flute geometry with right-hand cutting action and left-hand spiral direction, which helps pull chips away from the cutting zone during operation. The small end diameter measures 0.1813 inches and the large end measures 0.2294 inches, with a taper rate of 1:48. The straight shank measures 0.2344 inches in diameter. This tool is suited for machinists, tool-and-die workers, and maintenance technicians working in metalworking and general fabrication environments.

This reamer is used in applications requiring precision tapered hole finishing where a taper pin will be driven or pressed to create a secure mechanical connection. Typical uses include shaft-to-hub connections, linkage assemblies, and fixture work in both production and maintenance settings. The general-purpose performance rating makes it appropriate for a wide range of ferrous and non-ferrous workpiece materials at moderate cutting speeds.

Key Features

• No. 3 taper pin size with a 1:48 taper rate for standardized fitment
• High-speed steel construction provides wear resistance and edge retention
• Spiral flute geometry with left-hand spiral promotes chip evacuation during right-hand cutting
• Bright, uncoated finish suitable for use with cutting fluids
• Straight shank at 0.2344 inches diameter fits standard drill chucks and collets
• Flute length of 2.3125 inches provides ample cutting depth for typical taper pin bores

Compatibility

Designed as a general-purpose replacement or stock reamer for No. 3 standard taper pin applications per ASME taper pin sizing conventions. Confirm hole and pin size requirements before use.

Installation Notes

This reamer is installed and operated by machinists using a drill press, lathe tailstock, or hand turning with a tap wrench, depending on the application. Secure the workpiece firmly before reaming to prevent movement. Use an appropriate cutting fluid for the workpiece material to extend tool life and improve finish quality. Never force the reamer; advance with steady, controlled pressure to avoid tool breakage or out-of-tolerance hole geometry.