Value Collection SM24N04 Taper Pin Reamer No. 4 Hss

Product Description

The VALUE COLLECTION SM24N04 is a No. 4 taper pin reamer machined from high-speed steel (HSS) for enlarging, finishing, and shaping tapered holes to accept standard taper pins. The tool features a straight flute geometry and a right-hand cutting direction, making it suitable for general-purpose reaming operations on a manual or machine spindle. The small end diameter measures 0.2071 inches and the large end measures 0.2604 inches, with a taper rate of 1:48 consistent with standard taper pin specifications. Machinists, toolroom technicians, and maintenance mechanics use this reamer when fitting taper pins in shafts, collars, and mechanical assemblies.

This reamer is intended for use in job shop, production, and maintenance-repair-operations (MRO) environments where precise taper pin hole preparation is required. It is suited for hand reaming with a tap wrench or machine reaming in a drill press or milling machine at controlled feed and speed. The bright, uncoated finish is appropriate for general-purpose applications in ferrous and non-ferrous materials where no special coating is needed.

Key Features

• No. 4 taper pin size with a 1:48 taper rate matching standard taper pin dimensions
• Small end diameter of 0.2071 inches and large end diameter of 0.2604 inches
• High-speed steel construction for durability in general-purpose reaming
• Straight flute design suited for hand or light machine reaming
• Right-hand cutting direction with a bright, uncoated finish
• Straight shank diameter of 0.2656 inches (17/64 inches) for standard chuck mounting

Compatibility

Designed as an OEM-style replacement and standard toolroom reamer for No. 4 taper pin applications requiring a 1:48 taper rate in general-purpose machining and maintenance operations.

Installation Notes

This reamer should be installed in a compatible tap wrench or machine chuck matched to the 0.2656-inch straight shank before use. Secure the workpiece fully before reaming and apply cutting fluid appropriate for the workpiece material to extend tool life and improve finish quality. Always ream incrementally and avoid excessive feed pressure, which can deflect the reamer or damage the taper. Follow applicable shop safety practices and machine operating procedures when using rotary cutting tools.