Some noticed that the discs didn't hold. First try tightening the washer onto the shaft. If it stays loose, turn the pulley counter-clockwise, apply light pressure starting where it was loosened and let it thread backwards one thread (about 2 threads total), then tighten again and check if it is stuck. This has worked for me on a few drives I've tried and the drives stay in place if they are in the correct thread. Great product and value.
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