LRT455520-S LRT Series tapered bore needle roller inner ring, 45 mm I.D. x 55 mm O.D. x 20 mm width, single bearing unit for NAST45/NAST45R assemblies, high carbon steel, sealed ball bearing alternative, linear slide unit ready

Tapered bore inner ring 45 mm I.D. single unit
✔️ 45 mm I.D. x 55 mm O.D. x 20 mm width; High carbon steel; LRT series

This single LRT series tapered bore inner ring is an inner race for needle roller bearings, typically used in linear slide units, compact gearboxes and transmission components where a matched NAST45 or NAST45R assembly is required.

✅ Tapered inner bore I.D. 45 mm
✅ Outer diameter O.D. 55 mm
✅ Overall width 20 mm
✅ High carbon steel inner ring, LRT metric series
✅ Compatible with NAST45 and NAST45R machined type assemblies
✅ Single bearing pack, SKU 861522, weight 0.260 lb

💡 What is a needle roller inner ring used for in linear slide units? A needle roller inner ring acts as the hardened raceway that needle rollers run on, letting compact assemblies carry higher radial loads with less wear. Quick intro: This part supplies the inner raceway for compact needle roller systems, handy in tight linear slide units and compact transmissions. - Provides a precise hardened raceway for needle rollers to improve radial load support and service life. - Keeps rollers aligned in linear slide unit setups and small gearboxes for consistent motion. - Commonly paired with matched cages like NAST45 or NAST45R and used as an alternative to sealed ball bearing options.