KD10/11/20/21/41/42 couplings are rated for 1/3 degree for sizes 103-604; sizes 705 and up are rated for 1/4 degree.KD1/2 couplings are rated for 1/2 degree; These are the maximum allowable misalignment limits.160; Recommended alignment tolerance is 0.10 degrees per disc pack; Always consult the installation instructions for more detail.