Inner Ring IRT3520 Metric Needle Roller Bearing, Single, 35 mm ID x 40 mm OD x 20.5 mm Width, High Carbon Steel, for shell-type assemblies Fits TA4020Z TLA4020Z

Single IRT3520 inner ring for metric needle bearings
✔️ 35 mm ID x 40 mm OD x 20.5 mm W, high carbon steel, fits TA4020Z

This single inner ring mates with shell-type needle roller bearings and is typically used in linear slide units, compact gearboxes, and transmission assemblies where a slim, high-load raceway is needed.

✅ Model IRT3520, Metric IRT series
✅ Bore: 35 mm; Outside diameter: 40 mm; Width: 20.5 mm
✅ Material: High carbon steel for strength and wear resistance
✅ For shell-type needle roller bearing assemblies; fits TA4020Z and TLA4020Z
✅ Single piece, compact footprint, approximate weight 0.100 lb

💡 What is a needle roller bearing inner ring used for in linear slide units? A needle roller inner ring provides a hardened raceway that supports needle rollers so you get high radial load capacity in tight spaces. It's a handy choice when space is limited but performance matters. Quick intro: - Provides a durable raceway for needle rollers, boosting load capacity and wear life for linear slide unit setups - Ideal for compact gearbox and transmission assemblies where sealed ball bearing or ceramic options might be paired in hybrid designs - Simplifies assembly with matching shells and parts like TA4020Z/TLA4020Z and reduces friction in constrained spaces