The Ball Screw That Ran Away With Itself We selected a Ø25 mm ball screw for a horizontal axis: 800 mm travel, 10 kg load, 1 m/s top speed. The L10 life calculation was fine — about 20,000 hours. On the floor, the screw whined loudly above 1.5 m/s and started to vibrate. We’d checked …

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