Frameless fans offer longevity & silence with fluid bearings

16th April 2015
Posted By : Barney Scott
Frameless fans offer longevity & silence with fluid bearings

Due to a variety of mounting options, JARO's frameless bracket fans offer design flexibility and are suitable for IC, CPU or embedded heat sink designs, or for direct PCB mounting. Blade diameter ranges in size from 20 to 88mm, heights from 7 to 15mm are offered, and airflow ranges from 99 to 1444l/m. Standard operating temperature is -10 to +70°C, and optional extended temperatures are -35 to +90°C.

Bearing options available for JARO"s frame-less bracket fans include dual-ball bearing and Aerospace Fluid Bearing (AFB) designs. JARO's AFB bearing currently offers high overall performance by minimising mechanical friction, which results in a low-noise, long-life product.

By avoiding mechanical friction, JARO's AFB bearings provide a virtually-silent operation as follows: As the fan starts to rotate, centrifugal force pushes aerospace fluid from the outside of the bearing towards the center of the rotating shaft. This force forms a thin film between the shaft and the bearing that greatly reduces friction, thus extending the life of the fan. The lead time for JARO's standard bracket models is 4-8 weeks, while custom bracket models will run 10-12 weeks.

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