Double ball bearing

It adopts the form of rolling friction and uses two ball bearings with a small contact surface. There are several tiny steel balls in the bearing rotating around the axis, so the friction is small and there is no oil leakage problem. Suitable for fans with higher rotating speeds, with a service life of more than 60,000 hours.

Oil-impregnated bearings

Sleeve bearings using sliding friction, using lubricant and drag reducing agent in the sleeve, have the advantage of low noise, but the lubricant will volatilize due to the oil seal after long-term use, and the oil seal needs to be opened for refueling, otherwise the bearing will easily wear and the service life is about 30,000 hours.

Hydraulic bearing

Liquid pressure bearings are an upgraded version of oil-containing bearings. Liquid pressure bearings improve the bottom non-sealed design of traditional bearings, sealing the entire bottom of the bearing to form a sealed oil-retaining design. They use special low-wear, high-temperature-resistant grease to make the operation more stable.When choosing a fan, you must first use a dimension to measure the hole distance (the hole distance is the distance between two screws)

Note: The hole distance is measured based on the center point of the two screw holes