Value Collection 557u 5 Taper Pin Reamer No 5 Hss

Product Description

The VALUE COLLECTION 557u 5 is a No. 5 taper pin reamer designed to enlarge, finish, and shape tapered holes for taper pin applications in precision mechanical assemblies. Machined from high speed steel (HSS) with a bright, uncoated finish, it delivers reliable cutting performance across a range of materials. The reamer measures 4.3125 inches overall length with a 2.8125-inch spiral flute section and a 0.3125-inch square shank. Right-hand cutting direction pairs with left-hand spiral flutes to reduce chatter and produce a clean, accurate taper. This tool is suited for machinists, toolmakers, and maintenance technicians working with taper pin joints in shafts, hubs, and mechanical components.

This reamer is used in general-purpose machining and maintenance environments where taper pin holes must be accurately sized or refinished. Typical applications include fitting No. 5 standard taper pins in shaft collars, gear hubs, and mechanical linkages. The small end diameter of 0.2409 inches and large end diameter of 0.2994 inches conform to the standard No. 5 taper pin geometry at a 1:48 taper rate. Suitable for use in manual lathes, drill presses, or hand-held operations where a square shank driver is available.

Key Features

• High speed steel construction for general-purpose cutting across common workpiece materials
• Spiral flute geometry with left-hand spiral and right-hand cut reduces chatter and improves chip evacuation
• No. 5 taper pin size with 1:48 taper rate matches standard taper pin specifications
• Square shank provides positive drive engagement in standard taper pin reamer holders and tap wrenches
• Bright, uncoated finish suitable for use with cutting oils and standard machining fluids
• 2.8125-inch flute length accommodates full engagement depth for No. 5 taper pin holes

Compatibility

Designed as an OEM-style replacement and general-purpose tooling option for No. 5 standard taper pin applications in manual and light CNC machining operations.

Installation Notes

This reamer is installed by machinists or maintenance technicians using a tap wrench, T-handle, or machine spindle with appropriate square-shank adapter. Secure the workpiece firmly before reaming and apply a suitable cutting oil to extend tool life and improve surface finish. Take light, consistent passes and avoid excessive feed pressure to prevent bell-mouthing or tool deflection. Follow standard shop safety practices including eye protection and proper workholding.