Inner Ring LRT404840 for Needle Roller Assemblies, Metric 40 mm ID x 48 mm OD x 40 mm Width, High Carbon Steel, General Use, Single Piece, Fits RNA6908, Suitable for Linear Slide Unit Applications
✔️ High carbon steel, tapered bore, fits RNA6908, single unit
This single inner ring is for needle roller bearing assemblies, commonly used in linear slide units, gearboxes, and industrial machinery where a hardened race is needed.
✅ Model: LRT404840, Metric series, machined inner ring✅ Inner diameter : 40 mm
✅ Outer diameter : 48 mm
✅ Width : 40 mm
✅ Material: high carbon steel, hardened for general use
✅ Bore type: tapered (to assemble with RNA6908)
✅ Pack: single piece, sold individually
💡 What is an inner ring used for in needle roller bearing assemblies? An inner ring acts as the raceway for needle rollers, enabling accurate roller guidance and reliable radial load support in compact assemblies. In short, it gives rollers a hardened surface to ride on and makes installation easier. - Improves load capacity and wear resistance in needle roller bearings - Helps alignment in linear slide units, transmissions, and industrial equipment - Pairs with parts like RNA6908 for compact, serviceable assemblies - A practical alternative when sealed ball bearings or ceramic options aren't required