Various tests have been conducted to confirm the dustproof and waterproof performance of the seated rolling bearing. The representative test results are shown below. Dust Dispersion Rotation Test (Dust Dispersion Performance) A drum-shaped dust dispersal rotary test machine is used to directly throw dust on the rolling bearing with a seat while running to determine the dust-proof performance of the product. Rotation speed: 640 min-1 Load: Only belt tension Dust: Aluminum powder (1000 [sieve]) Lubrication: No grease replenishment during operation Dust dispersal test result example (dustproof performance) Normal product is generated after approximately 500 hours of operation Abnormal sound, it can be concluded that the dust has invaded. Correspondingly, the triple seal assembly (accessory symbol L3) and the dust cover assembly (accessory symbol C) did not produce any abnormalities after 3,000 hours of operation, showing good dust-proof performance. Dust burying rotation test (dust-proof performance) The rolling bearing with seat is buried in dust, and the impeller installed on the shaft is operated while stirring the dust to determine the dust-proof performance of the product. The service conditions of the seated rolling bearing under this test method are the most severe. Speed: 640 min-1 Load: Only belt tension Dust: GC powder (500[sieve]) Lubrication: No grease replenishment during operation Dust buried rotation test result example (dustproof performance) Normal product is generated after about 200 hours of operation Abnormal sound, it can be concluded that the dust has invaded. Correspondingly, the triple seal assembly (accessory symbol L3) and the dust cover assembly (accessory symbol C) did not produce any abnormalities after 2,000 hours of operation, showing good dust-proof performance. The impeller for waterproof performance test runs while throwing water on the rolling bearing with seat to determine the waterproof performance of the product. Rotation speed: 380 min-1 Load: Only belt tension Water: Tap water test result example of waterproof performance After about 1 000 hours of normal product operation, rust of the ball and raceway ring (outer ring and inner ring) can be found. Correspondingly, the triple seal assembly (accessory symbol L3) and the dust cover assembly (accessory symbol C) after approximately 2,500 hours of operation showed the same degree of rust as normal products.