The SF1 composite copper sleeve is an oil, selflubricating bearing designed to support rotating shafts in compact assemblies. It combines a copperbased sleeve with embedded solid lubricants to provide reliable operation without external oil. Each piece is sized for a precise fit and built for long service with minimal maintenance. Key features and benefits Oil, selflubricating operation reduces maintenance and eliminates oil leaks in enclosed or clean environments. Composite copper sleeve delivers low friction and good wear resistance for longer life in rotating applications. Wide inner diameter options (38, 40, 45, 50, 55 mm) enable compatibility with common shaft sizes. Solidlubricant construction provides consistent performance across a range of operating conditions. Onepiece bushing design simplifies installation and replacement in existing housings. Outer dimensions are 40 x 44 x 60 mm, offering a compact footprint for small machinery. Package contains 1 piece per unit, suitable for individual replacements or selective upgrades. Key specifications Brand/model: SF1 Type: composite copper sleeve oil selflubricating bearing or bushing Inner diameter options: 38 mm, 40 mm, 45 mm, 50 mm, 55 mm Outer dimensions: 40 x 44 x 60 mm Material: composite copper sleeve with embedded lubrication Package quantity: 1 piece per set Mounting style: small bushing for shaft support Applications and use cases Robotics and hobby projects: use as a shaft bearing in small servos, motors, or joint actuators where oil operation is preferred. CNC, 3D printers, and compact machinery: serves as a durable bearing sleeve for printer extruder drives, belt pulleys, or spindle supports where maintenance intervals are minimized. General machinery and conveyors: suitable for shaft supports in clean or enclosed environments, such as automated equipment, small conveyors, or geardriven assemblies needing reliable, oil lubrication. Notes on compatibility and installation Select the inner diameter that matches your shaft size for a proper pressfit or slipfit depending on the housing design. The inner diameter options are 38 mm, 40 mm, 45 mm, ******** mm to match common shaft sizes. Outer dimensions are fixed for this model, so confirm the housing cavity accommodates 40 x 44 x 60 mm outer size. As an oil bearing, no external lubrication is required; rely on the embedded solid lubricant for continuous performance.