IRT4040 Inner Ring for Shell-Type Needle Roller Bearings, Metric, 40 mm ID x 45 mm OD x 40.5 mm Width, High Carbon Steel, Fits TA4540Z, Single Unit, good for sealed ball bearings

Single IRT4040 inner ring for shell-type bearings, metric
✔️ ID 40 mm, OD 45 mm, Width 40.5 mm, High carbon steel

This single inner ring is a metric IRT4040 component for shell-type needle roller bearings, commonly used in transmissions, gearboxes, and industrial linear slide units where precise radial guidance is needed.

✅ Model: IRT4040 metric inner ring
✅ Bore type: tapered; ID 40 mm, OD 45 mm, width 40.5 mm
✅ Material: high carbon steel, suited for heavy radial loads
✅ Fits shell-type needle roller bearings and assembles with TA4540Z
✅ Single unit pack, approx 0.230 lb; handy for sealed ball bearing repairs and linear slide unit work

💡 What is an inner ring used for in shell type needle roller bearings and linear slide units? An inner ring provides the hardened raceway that needle rollers run on, giving accurate radial support and ensuring the correct fit inside shell housings. It’s handy when rebuilding sealed bearing setups or aligning linear slide units. Quick intro: - Provides a precise raceway for rollers and shafts to improve load distribution - Ensures correct internal fit for shell-type assemblies like TA4540Z and compatible replacements - Supports sealed ball bearing repairs, ceramic upgrade options, and routine linear slide unit maintenance