Yankee 491-10 Taper Pin Reamer Spiral Left Hand

Description:

The Yankee 491-10 taper pin reamer is a precision spiral flute cutting tool designed for accurately sizing and finishing tapered holes for taper pin installations in machining and industrial manufacturing applications. Featuring a #10 taper size with a left-hand spiral flute design, this reamer is commonly used in drill presses, milling machines, lathes, and CNC machining centers requiring precise taper hole preparation and smooth surface finishing. Machinists and maintenance technicians use this tool for taper pin fitting, alignment work, fixture assembly, and precision mechanical applications.

Applications:

The Yankee 491-10 taper pin reamer is widely used in machine shops, tool and die operations, aerospace manufacturing, fixture fabrication, and industrial assembly applications. It functions as a finishing tool that enlarges and accurately tapers pre-drilled holes to standard taper pin dimensions while improving alignment accuracy and surface finish in steel, aluminum, brass, and other machinable materials.

Technical Specifications:

• Manufacturer: Yankee
• Model / Part Number: 491-10
• Product Type: Taper Pin Reamer
• Reamer Size: #10
• Flute Type: Spiral Flute
• Spiral Direction: Left-Hand Spiral (LH)
• Taper Standard: Taper pin reamer configuration
• Function: Precision tapered hole sizing and finishing
• Application: Taper pin installation and alignment machining
• Material: High Speed Steel (HSS)
• Cutting Direction: Right Hand Cut
• Installation: Drill chuck, collet, or machine spindle mounting
• Material Compatibility: Steel, aluminum, brass, plastics, and machinable metals
• Construction: Precision-ground hardened cutting tool
• Application Environment: Industrial machining and manufacturing operations
• Status: Industrial machining and metalworking tool

Common Replacements:

• Cleveland #10 Spiral Flute Taper Pin Reamer
• Precision Twist Drill #10 Taper Pin Reamer
• Dormer #10 LH Spiral Taper Reamer