Single Inner Ring LRT455540, Metric 45 mm ID x 55 mm OD x 40 mm Width, High Carbon Steel needle roller bearing race for general use, compatible with RNAFW557240 assembly

Single metric inner ring 45×55×40 mm for bearings
✔️ ID 45 mm, OD 55 mm, Width 40 mm, Fits RNAFW557240, Single each

A single high carbon steel inner ring for needle roller bearing assemblies, typically used in linear slide units, gearboxes, and industrial machinery.

✅ Model: LRT455540 inner ring, Metric LRT series
✅ Material: High carbon steel, machined race surface
✅ Dimensions: ID 45 mm, OD 55 mm, Width 40 mm
✅ Fits: for assembly with RNAFW557240 needle roller cage
✅ Application: general use in linear slide units and gearboxes
✅ Pack: single inner ring per listing, weight ~0.54 lb

💡 What is an inner ring for needle roller bearings used for? A quick answer: it provides the hardened raceway needle rollers run on and is handy where space is tight. - Provides a hardened running surface for needle roller bearings in linear slide units. - Keeps rollers aligned and reduces wear compared to using the shaft as the race. - Often used alongside sealed ball bearing or ceramic components in compact machine designs.