Metric inner ring 45 x 52 x 23 mm single unit, high carbon steel needle roller bearing race compatible with RNA4909UU, general purpose bearing part for linear slide units and sealed ball bearing replacements

Single metric inner ring 45 x 52 x 23 mm for RNA4909UU
✔️ 45 mm ID, 52 mm OD, 23 mm width, high carbon steel, machined LRTZ455223

This is a single metric inner ring (inner race) for needle roller bearings, commonly used in linear slide units, machine repairs, and sealed ball bearing replacements.

✅ Model: LRTZ455223 inner ring for needle roller bearings
✅ Dimensions: 45 mm ID x 52 mm OD x 23 mm width
✅ Material: high carbon steel, machined finish, chamfer bore, no oil hole
✅ Compatibility: fits RNA4909UU assemblies for general use
✅ Pack: single unit, SKU 861630, approx. weight 0.200 lb

💡 What is an inner ring for needle roller bearings used for? This component provides a hardened running surface and precise support for rollers. - It creates the mating surface inside needle roller and sealed ball bearing setups, improving load distribution and reducing wear. - It affects linear slide unit fit and axial positioning; correct ID/OD and width ensure smooth motion and alignment. - Handy for maintenance or upgrades when replacing worn inner races or fitting hybrid ceramic assemblies.