1. Product Overview The 51103 single-direction thrust ball bearing is a separable three-piece assembly consisting of shaft washer, housing washer and ball cage unit, specially designed to bear unidirectional pure axial load, not suitable for radial force. It is widely used in vertical pumps, small jacks and low-speed vertical transmission equipment that require stable unidirectional axial support. Get a quote within 24 hours for your project 2. Technical Specifications