Cars Wheel Hub Bearings JRM3938A/3968XD JRM3939/JRM3968XD JRM3939X2/JRM3972XD JRM3940X2/JRM4068XD BTH1024 40KWD02 FC4078501 DAC40900050(JRM3940/JRM4072XD)

Default rubber seal, iron cover seal, no seal, random delivery！ JRM3938A/3968XD 38.1x68x37mm JRM3939/JRM3968XD 39x68x37mm JRM3939X2/JRM3972XD 39x72x37mm JRM3940X2/JRM4068XD 40x68x42mm JRM3940/JRM4072XD 40x72x37mm BTH1024 40x73x55mm 40KWD02 40x75x50mm FC4078501 40x75x60mm DAC40900050 40x90x50mm

• 1.A key component of the automobile chassis, installed between the wheel hub and the axle, integrating rolling elements and sealing structures, and is responsible for connecting the wheel to the body. It also bears the weight of the body (radial load) and the horizontal force (axial load) generated by steering and braking.
• 2.Transmits power and distributes braking force, supporting the vehicle's weight. Reduces wheel friction, ensuring stable rotation and preventing wheel deviation. Isolates dust, mud, and water, preventing internal grease leakage and extending life.
• 3.Split-type: Commonly used in early models, requires additional components and offers poor sealing and portability. Unit-type: The current mainstream type, integrating bearings and flanges (some with ABS sensors), offers easy installation and strong sealing.
• 4.Fault Signs: Unusual humming noise from the wheels while driving (more noticeable at higher speeds), heavy steering, wheel shaking, or the ABS light illuminates. Maintenance: Maintenance-free design with a lifespan of 80,000-150,000 kilometers. Replacement requires special tools. Ensure the required torque is met and inspect the seals.