low vibration spindle speed of bearing
Vibration monitoring of bearings at low speeds - 1982-6-1 · TRIBOLOGY international June 1982 143 Smith - Vibration monitoring of bearings at Iow speeds At very low speeds with small amounts of damage, back- ground noise, whether mechanical or electrical has sub- merged the high frequency signals; RayI quotes a speed as low as 25 r/min with 2% outer track damage on 31 mm …
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