Inner Ring IRT4515 Metric 45 mm ID x 50 mm OD x 15.5 mm Width Single Shell-Type Needle Roller Bearing Part, High Carbon Steel, Fits TA5015Z, Metric Series

Single IRT4515 inner ring, 45 x 50 x 15.5 mm
✔️ 45 mm ID x 50 mm OD x 15.5 mm width; shell-type, high carbon steel

This single inner ring is a metric IRT4515 replacement part for shell-type needle roller bearings, commonly used in industrial gearboxes, linear slide units, and compact powertrains. It is made from high carbon steel and designed to assemble with TA5015Z shells.

✅ Model: IRT4515, Metric series
✅ Dimensions: 45 mm ID x 50 mm OD x 15.5 mm width
✅ Material: high carbon steel inner ring for shell-type bearings
✅ Fits with TA5015Z shell; single piece sold per listing
✅ Ideal for needle roller bearing assemblies, linear slide unit setups and sealed ball bearing retrofit jobs

💡 What is an inner ring for a needle roller bearing used for in linear slide unit applications? An inner ring provides a hardened running surface and a precise raceway for needle rollers to carry high radial loads. Quick note: it improves load capacity and keeps shafts aligned in tight assemblies. - Supports accurate shaft alignment in linear slide unit and rotary assemblies - Enables compatibility with sealed ball bearing housings or ceramic rolling elements when upgrading - Works with matching shell parts like TA5015Z to simplify assembly and extend service life