![]() Be sure that shafts are parallel and pulleys are in alignment.Instrumentation for measuring belt tension is available.Ĭonsult the product section of this catalog. In such a case, the tension should be increased gradually, until satisfactory operation is attained.Ī good rule of thumb for installation tension is as shown in Figure 20, and the corresponding tensioning force is shown in Table 9, both shown in SECTION 10 BELT TENSIONING.įor widths other than shown, increase force proportionally to the belt width. When torque is unusually high, a loose belt may "jump teeth" on starting. Preloading (often the cause of premature failure) is not necessary. Consequently, a belt, when installed with a snug fit (that is, not too taut) assures longer life, less bearing wear and quieter operation. The positive grip of the belt eliminates the need for high initial tension. Timing belt installation should be a snug fit, neither too tight nor too loose.The following precautions should be taken when installing all timing belt drives: Plastic pulleys with metal inserts or metal hubs represent a good compromise. plastic) is a matter of price, desired precision, inertia, color, magnetic properties and, above all, personal preference based on experiences. The choice of the pulley material (metal vs.Therefore, take this into account when the size of the smallest pulley and the materials for the belt and tension member are selected. If the belt reinforcing fiber, i.e., tension member, as well as the belt material, have high tensile strength and no elongation, the belt will not be instrumental in absorbing the shock loads. These drives are subjected to continuous and large accelerations and decelerations. ![]()
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