Value Collection 556U4/0 Taper Pin Reamer 4/0 Hss

Product Description

The VALUE COLLECTION 556U4/0 is a straight-flute taper pin reamer designed for enlarging, finishing, and shaping tapered holes to accept standard 4/0 taper pins. Machined from high-speed steel with a bright, uncoated finish, it delivers consistent material removal in general-purpose shop and field applications. The reamer cuts right-hand with a 1:48 taper rate, a small end diameter of 0.0869 inches, and a large end diameter of 0.1142 inches. The 1/8-inch square shank seats securely in a tap wrench or drill press chuck. Machinists, tool-and-die workers, and maintenance technicians reach for this reamer when fitting taper pins in shafts, collars, and mechanical assemblies.

This reamer is suited for light-to-medium material removal in machine shop, maintenance, and repair operations where a tapered hole must be sized to accept a 4/0 standard taper pin. Typical applications include fitting taper pins in gear hubs, couplings, and shaft assemblies across industrial, agricultural, and general manufacturing environments. The 1-5/16-inch flute length provides adequate chip clearance in moderate-depth holes, and the 2-5/16-inch overall length is compatible with standard tap wrenches and drill press setups.

Key Features

• High-speed steel construction for durability across a range of ferrous and non-ferrous materials
• 1:48 taper rate matches the standard taper pin specification for 4/0 pins
• Straight flute geometry suited for general-purpose hole finishing and sizing
• Bright, uncoated finish allows easy visual inspection of cutting edges before and after use
• Square shank provides positive drive and prevents slippage in standard tap wrenches
• Right-hand cutting direction for conventional forward-feed operation

Compatibility

Designed as an OEM-style replacement or direct-use reamer for applications requiring a standard 4/0 taper pin fit in general-purpose machining and maintenance operations.

Installation Notes

This tool is installed and operated by machinists or maintenance technicians using a tap wrench, brace, or low-speed drill press. Secure the square shank firmly before beginning the cut and apply cutting fluid appropriate for the workpiece material to extend tool life and improve finish quality. Advance the reamer steadily without forcing to avoid chatter or bell-mouthing the hole entrance. Inspect cutting edges before use and discard or resharpen the tool if chipping or dullness is evident.