2 Pcs x SCS20UU Linear Ball Bearing Slide Blocks Model: SCS20UU Inner diameter (ID): 20 mm / 0.79 in Length (L): 50 mm / 1.97 in Material: Aluminium alloy housing with precision ball bearings Key benefits — why you need these Smooth, lownoise motion: Precision ball bearings reduce vibration and deliver quieter operation compared with plain bushings. Low friction and consistent performance: Bearings lower rolling resistance for smoother travel and improved repeatability in linear motion systems. rigidity and strength: Aluminium alloy housing provides structural support and resists deformation under load. Long service life and abrasion resistance: Quality materials and workmanship increase durability and reduce frequency of replacement. Easy maintenance and replacement: Standard SCS20UU form factor allows straightforward swapin replacement on compatible 20 mm linear rails. What makes this product stand out Precision bearings and tight tolerances for dependable linear guidance. Economical option for upgrades or repairs without compromising performance. Compact, robust design well suited to repeated use in motion systems. Function and compatibility Designed to slide on 20 mm linear shafts (ID = 20 mm). Standard SCS20UU dimensions (L = 50 mm) fit typical carriage and rail setups that accept SCSstyle slide blocks. Typical applications (practical use cases) 3D printers: worn slide blocks to restore accurate, quiet axis movement. Small CNC routers and laser cutters: Provide stable, lowfriction guidance for X/Y axes. Robotics and automation: Use in linear stages, actuators, or positioning modules where smooth repeatable motion is required. What you receive 2 pieces of SCS20UU aluminiumalloy linear ball bearing slide blocks (ID 20 mm, L 50 mm) Notes Intended for use with 20 mm linear shafts. Verify shaft compatibility and required tolerances before installation.