1. Product Overview The 51311 single direction thrust ball bearing consists of shaft washer, housing washer and steel ball assembly, open type structure only bears one-way heavy axial load. It features high axial rigidity and simple installation, suitable for lifting, jack and low-speed heavy thrust mechanical parts. 👉 Get a quote within 24 hours for your project 2. Technical Specifications Model: 51311 Shaft Washer Bore (d): 55mm Housing Washer OD (D): 105mm Overall