This LV20457 ZZ Vgroove rail roller bearing is a single piece bearing designed for smooth linear motion on Vgroove rails. It features an inner diameter of 20 mm, an outer diameter of 57 mm, and a height of 22 mm. The ZZ designation indicates shielded on both sides, providing protection from dust and helping to retain lubrication for longer service life. Key benefits Enables smooth, lowfriction movement along Vgroove rails in automation and lightduty machinery. Shielded on both sides (ZZ) to resist contamination and reduce maintenance needs. Compact, standard LV20457 size that fits common Vgroove rail configurations. Easy interchange with existing LV20457 components for fast replacement. Key attributes Model: LV20457 ZZ Type: Vgroove rail roller bearing Inner diameter: 20 mm Outer diameter: 57 mm Height: 22 mm Shielding: ZZ (two shields) Quantity: 1 piece Compatibility: LV20457 Vgroove rail system Material: not specified Performance: designed for reliable operation in appropriate rail systems Applications Linear motion assemblies in automation equipment, packaging machines, and small machinery using Vgroove rails. Replacement bearing in LV20457 based rail assemblies to restore smooth carriage movement. Carriages and sliding components in CNC, robotics, or 3D printer setups that use 20 mm bore Vgroove rails.