Technical Manual for Ribbed Belt Drives

Drive DesignBelt Length Correction Factor c 3The belt length correction factor c 3 takes into account the bendingstresses in the particular belt section in relationship to a standardeffective length.This results in the following relationships:ribbed belt length used > standard effective length c 3 > 1.0ribbed belt length used = standard effective length c 3 = 1.0ribbed belt length used < standard effective length c 3 < 1.0c 3 = 1 +L(es) L eff[ ]0.09 – 1 · 2.4L es – ribbed belt length usedL eff = standard effective lengthTable 2Section PHSection PJEffective lengthEffective lengthEffective lengthEffective lengthL es c 3 L es c 3 L es c 3 L esc 3(mm)(mm)(mm)(mm)698 0.96735 0.97762 0.98813 1.00858 1.01864 1.01886 1.01914 1.02955 1.03965 1.03975 1.03990 1.031016 1.041080 1.061092 1.061096 1.061168 1.071194 1.081200 1.081222 1.081230 1.091244 1.091262 1.091270 1.091285 1.101290 1.101301 1.101309 1.101316 1.101321 1.101333 1.101371 1.111397 1.111439 1.121475 1.131600 1.151854 1.181895 1.181915 1.191930 1.191956 1.191992 1.202083 1.212155 1.22280 0.74330 0.76356 0.78362 0.78381 0.79406 0.80414 0.81432 0.82457 0.83483 0.84508 0.85559 0.87584 0.88610 0.89660 0.90711 0.92723 0.92762 0.93813 0.95836 0.95864 0.96914 0.97955 0.98965 0.981016 1.001092 1.011105 1.011110 1.011123 1.021130 1.021150 1.021168 1.031194 1.031200 1.031222 1.041244 1.041262 1.041270 1.041285 1.051301 1.051309 1.051316 1.051321 1.051333 1.051355 1.061371 1.061397 1.061428 1.071439 1.071475 1.081549 1.091600 1.101651 1.101663 1.101752 1.121780 1.121854 1.131895 1.131910 1.141915 1.141930 1.141956 1.141965 1.141981 1.141992 1.142083 1.162155 1.172210 1.172337 1.182489 1.2010Non standard lengths on request.