Double-row and angular-contact ball bearings are the equivalent of two single-opposed angular-contact ball bearings. They have lines of contact converging outside the ball bearing envelope (as in a back-to-back duplex pair) or inside the envelope (as in a face-to-face pair). Ball bearings with externally converging lines of contact are much more resistant to overturning moments. There are various models available, such as ACB30500020, ACB32470018, ACB35520022, ACB40680030 and ACB45750032.
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