2Pcs SMR137 Hybrid Ceramic Ball Bearing, ABEC3 4mm Stainless Steel Bearing
Description:Ultra High Hardness: Si3N4 balls offer exceptional hardness for excellent wear and corrosion resistance, complemented by the AISI440C stainless steel outer ring structure to enhance bearing stability and lifespan.High Precision: ABEC3 bearings, with tight dimensional tolerances, ensure smooth movement with minimal friction, making them suitable for applications that require reliable rotation and durability.Lightweight Design: The use of lightweight materials reduces bearing stress, improving equipment efficiency. Easy installation & replacement.Wide Applications: Suitable for skateboards, power tools, high-speed motors, cryogenic engineering, industrial robots, fishing gear, small motors, etc.Specification:Material: Si3N4 Balls and AISI440C Stainless Steel Outer RingInner Diameter: 7 mm/0.28 inchOuter Diameter: 13 mm/0.