About these items:Durable & Long-lasting: Each linear rail is crafted from high carbon steel and aluminum with a chrome-plated surface for excellent rust resistance, ensuring high durability and reliability for prolonged use.Low Noise Sliding: Integrated ball bearings in aluminum SBR20UU slide blocks work seamlessly with carbon steel shafts, delivering smooth, quiet, and efficient motion for labor-saving control.High Precision Performance: Circular shaft dimensions and straightness ensure superior accuracy, repeatability, and stability, making installation and operation straightforward with precise mounting holes.Versatile Applications: Ideal for high-load automation equipment and DIY projects such as CNC machines, 3D printers, router sleds, laser engravers, and trainer rocker plates.Various Sizes Available: Choose from different guide rail lengths (31.5", 39.4", or 47.2") to suit your project needs while enjoying consistent quality and performance.Key Differences:The SBR20-800 mm set includes guide rails of 31.5" length, with a net weight of 14.1 lbs (6.4 kg) and a package size of 35.4 x 5.7 x 3.1 in (900 x 145 x 80 mm).The SBR20-1000 mm set features 39.4" rails, weighs 17.4 lbs (7.9 kg), and has a package size of 43.3 x 5.7 x 3.1 in (1100 x 145 x 80 mm).The SBR20-1200 mm set offers longer 47.2" rails, with a net weight of 20.3 lbs (9.2 kg) and a package size of 51.6 x 5.7 x 3.1 in (1310 x 145 x 80 mm).Specifications:Model Numbers: SBR20-C 800L, SBR20-C 1000L, SBR20-C 1200LSlide Block Model: SBR20UUGuide Rail Length Options: 31.5 in, 39.4 in, 47.2 inShaft Diameter: Φ20 mmDynamic Load (per block): 882 NStatic Load (per block): 1370 NMaterial: High Carbon Steel & AluminumMounting Hole Distance A & B: 1.4 in (35 mm)Slide Block Size (L x W x H): 2 x 1.9 x 1.5 in (50 x 48 x 39 mm)Package Contents:SBR20-800 mm Set: 2 x SBR20 800 mm Linear Guide Rails with Supports, 4 x SBR20UU Sliding BlocksSBR20-1000 mm Set: 2 x SBR20 1000 mm Linear Guide Rails with Supports, 4 x SBR20UU Sliding BlocksSBR20-1200 mm Set: 2 x SBR20 1200 mm Linear Guide Rails with Supports, 4 x SBR20UU Sliding Blocks
