Inner Ring Metric LRTZ202518, 20 mm ID x 25 mm OD x 18 mm Width, High Carbon Steel needle roller bearing race for assembly with RNA4904UU, general purpose single unit

Metric inner ring LRTZ202518 - 20 x 25 x 18 mm single unit
✔️ High carbon steel race; fits RNA4904UU; ID20mm OD25mm width18mm

This inner ring is a precision metric inner race for needle roller bearing assemblies, sold as a single unit. It's commonly used in linear slide units, compact gearboxes, robotics, and conveyor drives where a hardened running surface is needed.

✅ Model: LRTZ202518 (Metric LRTZ series)
✅ Inner diameter: 20 mm (ID20mm)
✅ Outer diameter: 25 mm (OD25mm)
✅ Width: 18 mm (width18mm)
✅ Material: High carbon steel, machined raceway
✅ Application: For use with RNA4904UU needle roller bearing assemblies

💡 What is an inner ring used for in a needle roller bearing assembly? It provides the hardened, precision raceway that needle rollers run on, enabling smooth rotation and accurate linear motion in compact assemblies. Quick overview: - Improves load distribution and reduces wear in needle roller bearing and linear slide unit applications. - Preferred where high carbon steel or ceramic raceways boost durability compared to sealed ball bearing alternatives. - Commonly used in compact gearboxes, robotics joints, and conveyor systems for precise motion control.