1. Product Overview The RNA4906 single row needle roller bearing has no inner ring, adopting cage-guided needle rollers to achieve high radial load capacity within slim radial space. The shaft directly serves as the raceway and needs surface quenching and grinding. It is widely used in compact transmission machinery with limited installation space and medium-low speed operation. 👉 Get a quote within 24 hours for your project 2. Technical Specifications Model RNA4906 Inner