The Herkules 80102087500 Ball Bearing Blade Coupling is an authentic OEM component designed specifically for Herkules brand blade sharpening machines. This critical part facilitates the secure and smooth attachment of the blade to the motor shaft, minimizing friction and ensuring efficient sharpening operations. With an outer diameter of 40mm, an inner diameter of 17mm, and a height of 20mm, this coupling is engineered for precise fit and reliable performance in demanding workshop environments. It is a direct replacement part, essential for maintaining the optimal functionality and longevity of your Herkules sharpening equipment.