Inner Ring LRT455520 Metric Needle Roller Bearing Inner Race 45 mm ID x 55 mm OD x 20 mm Width, High Carbon Steel, Machined Type for RNAF557220, Single Bearing for Linear Slide Units

Metric inner ring single 45mm ID x 55mm OD x 20mm
✔️ Machined inner ring for RNAF557220, 45x55x20 mm, single unit

This is a machined metric inner ring (inner race) for needle roller bearing assemblies, commonly used in linear slide units, gearboxes, and compact industrial mechanisms where a precise raceway is needed.

✅ Model: LRT455520 inner ring, Metric Series, machined type
✅ Dimensions: Bore 45 mm, OD 55 mm, Width 20 mm
✅ Material: High carbon steel, suited for needle roller bearings and linear slide unit installs
✅ Compatibility: Designed to assemble with RNAF557220; single bearing pack, SKU 861700; weight 0.260 lb
✅ Application notes: Works alongside sealed ball bearing housings and can pair with ceramic upgrade options for specific performance needs

💡 What is an inner ring used for in needle roller bearing assemblies? An inner ring provides a hardened, precise raceway so rollers run smoothly and shafts stay aligned in tight spaces. - It creates the required race surface and secures roller alignment in compact assemblies. - Handy for linear slide units, transmissions, and shaft-mounted needle roller setups. - Enables compatibility with sealed ball bearing housings and ceramic upgrade paths for higher-speed or reduced-friction applications.