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608 Bearing Anemometer Cup Rotor
A three-cup anemometer rotor that spins on two press-fit 608 skate bearings (22.05 mm through bore, stacked 14 mm apart) riding on an 8 mm mast, with a 126 mm swept diameter and 30 mm deep scoops. One arm carries a blind 6 x 3 mm disc-magnet pocket over a bridged roof so a hall or reed sensor below counts one pulse per revolution for a DIY weather station.
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