Description
SC 20 UU Linear Motion Bearing Unit
The SC 20 UU is a linear motion bearing unit that contains a 20 mm inner diameter linear ball bearing securely housed in a sturdy metal or aluminum block. It is engineered to provide smooth, low‑friction linear movement along a straight shaft, making it suitable for CNC machines, 3D printers, automated equipment, robotics, and various precision motion systems. The “UU” designation means the bearing is sealed on both sides, which helps protect the internal ball elements from dust and debris, improving durability and reducing maintenance needs. With its compact size and robust construction, the SC 20 UU delivers reliable performance, rigidity, and consistent motion control in many industrial and hobbyist applications.
Size / Dimensions
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Shaft (Inner) Diameter: 20 mm
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Outer Width (W): approximately 65 mm
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Length (L): approximately 50 mm
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Height (H): approximately 42 mm
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Bolt Hole Spacing (Width): approximately 45–48 mm
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Bolt Hole Spacing (Length): approximately 35–38 mm
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Thread Size: typically M6 or similar (varies slightly by manufacturer)
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Weight: around 0.30–0.35 kg (varies by design)
Features
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Linear motion bearing unit: Enables smooth, straight‑line motion along a shaft
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Sealed both sides (UU): Protection against dust and contaminants for longer life
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Compact standardized size: Fits Ø20 mm shafts and is interchangeable with other SC20UU/LM20UU parts
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Low friction operation: Promotes accurate and consistent movement
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High rigidity and durability: Suitable for light‑ to medium‑duty loads in many machines
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Wide applications: Used in CNC machines, 3D printers, automation systems, robotics, and measurement equipment
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Easy installation: Pre‑assembled bearing in housing simplifies mounting and alignment
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