Page 16 of Double PlusŪ Chain & Sprockets by U.S. Tsubaki

selection guidelines iii confirm the maximum allowable roller load the roller load due to conveyed objects see fig 1 should not exceed the values shown in table 4a or 4b table depends on product used figure 1­conveyed object weight per roller iv confirm total chain tension tt in general a double plus system uses two strands of chain when calculating the total chain tension tt be sure to include the weight of each strand the chain tension tt is calculated using the following formula Ū figure 2­distribution of product line table 4a maximum allowable roller load standard and double plusŪ chain with snap covers units-lbs ft kgf/m plastic roller aluminum guide rail chain no c2030 c2040 c2050 c2060 c2080 27 40 40 60 54 80 67 100 plastic roller steel roller aluminum frame with steel rail tt w1 m l1 x f1 w2 x l2 x f2 w2 m l2 x f3 1.1 m l1+l2 f1 0.6 x tt x k maximum allowable chain tension table 1a or 1b tt total chain tension lbs or kgf ts chain tension/strand lbs or kgf w1 weight of conveyed objects in conveying portion lbs ft or kg/m w2 weight of conveyed objects in accumulating portion lbs ft or kg/m m weight of chain and slat etc lbs ft or kg/m l1 length of conveying portion ft or m l2 length of accumulating portion ft or m f1 coefficient of friction between chain and rail when conveying f2 coefficient of friction between chain and conveyed object when accumulating f3 coefficient of friction between chain and rail when accumulating hp required horsepower kw required kilowatts v chain speed ft min or m/min transmission efficiency of drive unit note when there are two strands in parallel the maximum chain tension should be ts 0.6 x tt 54 80 81 120 108 160 134 200 202 300 108 160 161 240 215 320 269 400 note these factors are for your reference only this is the load for two strands of double plusŪ chain table 4b maximum allowable roller load engineering class double plusŪ chain units-lbs ft kgf/m maximum allowable roller load 290 130 530 240 770 350 1,100 500 1,370 620 chain no rf03075vr rf03100vr rf05100vr rf05150vr rf10150vr v calculate required power hp tt v x 1.1 33,000 or kw tt v x 1.1 6,120 rf6025vr rf12200vr rf17200vr note these factors are for your reference only 14

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