Koppers 644101 Complete Gear Coupling With Three Bore Sizes

Koppers 644101 Complete Gear Coupling is a multi-bore gear coupling designed to connect two shafts by offering three bore sizes in a single assembly: 3/4", 7/8", and 1-1/2". This configuration lets technicians choose the appropriate shaft diameter without sourcing separate couplings, simplifying installation and inventory management in power transmission systems. The three bore options provide flexibility when equipment configurations change or spare parts must cover multiple shaft sizes. As a gear coupling, it transmits torque between shafts while accommodating variations in alignment, making it suitable for environments where precise alignment cannot be guaranteed. The model number 644101 identifies this complete coupling assembly that covers multiple common shaft sizes, reducing part variety in the field and supporting streamlined maintenance planning. Three bore sizes are common in industrial gear couplings, allowing a single part to support different shaft diameters and reducing the need for multiple SKUs in maintenance and refurbishment programs. The 644101 designation ties this unit to Koppers' gear coupling lineup, assisting catalog lookup and cross-referencing in technical documentation.