Engineers focused on fast, light automation systems may pay too much attention to speed specs when acceleration is what really counts.
Look through the specifications of any linear bearing, and you’ll come across a maximum speed. It’s an important spec, but not not nearly as important as many engineers think it is.
Speed does play a role in bearing life. Consistently moving loads above a bearing’s speed limit can result in premature wear. It is also possible, usually though a control error, to drive a bearing so fast that it will fail. For example, recirculating ball linear guides can experience end cap failure when driven at high speeds or accelerations. And roller bearings can freeze up at extremely high speeds. Yet these over-speed conditions are rare in well-designed motion system.
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