www.jbj.co.uk/couplings.html #DriveLineHarmony 4 Installation SIT Universal Joints Fig. 1 Fig. 2 To obtain a uniform rotary motion, always use two opposite single joints or one double joint. The pillow blocks must be positioned as close as possible to the joints (see figure 1 and 2). Fig. 3 correct wrong Fig. 4 When using two opposite single joints, respect the alignment of the inside yokes. In extensible transmissions also pay attention to the arrows stamped tally (see figure 3 CORRECT, figure 4 WRONG). Fig. 5 correct wrong Fig. 6 The joints angle α must be equal (see figure 5). The shafts can be moved one from the other either parallel or symmetrically. Pin holes must not be executed over the yokes to avoid damage (see figure 6).
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