DRIVE CHAINS - Tsubaki
DRIVE CHAINS - Tsubaki DRIVE CHAINS - Tsubaki
Before Use For Safe UseStandard Roller Chains Lube-Free Roller Chains Heavy Duty Roller Chains Corrosion Resistant Roller Chains Specialty Roller Chains Accessories Selection HandlingStep 26. Allowable Load Selection MethodStep 1Calculate from loadCheck the mass M(weight W) of the loadService factor: KsRPM: KnNumber of teeth factor: KzCalculate designchain tension: F’wProceduresConfirm data required for selectionStep 2Check motor characteristicsStart frequencyOver 6 times/day (8h)With cushionedstart and stopCalculate from loadStep 3Calculate fromacceleration/deceleration timeAcceleration time: tsCalculate chaintension: FsRPM: KnDeceleration time: tbCalculate chaintension: FbUse the larger valueNumber of teeth factor: KzCalculate designchain tension: F’s (F’b)Use the larger valueCalculate from inertia ratio RStarting torque: TsCalculate chaintension: FmsDecide the chain size so that the larger of F’w,F’s (F’b) and F’ms (F’mb) maximum allowable tensionDecide small sprocket: Z’, and large sprocket: ZCheck distance between shaftsCheck maximum shaft hole diameterDecide chain and sprocketCalculate chain length (number of links) LDecide on lubrication method from the smallsprocket rotation speed, referring to the kilowattratings table of a chain with identical pitchEndShock factor: KUse the larger valueStep 4Stalling torque: TbCalculate chaintension: FmbCalculate designchain tension: F’ms (Fmb)Selection Speed LimitPitch mmSpeed limitm/minThe following selection methoduses maximum allowable loadfor products with no kilowattratings tables, or for productsoperated under low speeds withfrequent stops.(1)For transmission with large shocksand other extreme conditions, inparticular large-load transmissionand transmission where a thrustload may operate, use F-typeconnecting links or two-pitchoffset links.(2)When using a one-pitch offset link,or a Super Chain 4 pitch offset link,make the following allowances forstrength with respect to themaximum allowable loadM-type CL*: 100%F-type CL: 100%Two-pitch offset link: 100%(Reference)One-pitch offset link: 65%4 pitch offset link: 90%(Super Chain single strand)One and two-pitch offset link: 60%(BS/DIN Chain)(3)There is a possibility that the rimor boss of commercially availablecast iron sprockets are notstrong enough for the hightension of SUPER Chain, SUPER-H Roller Chain, and ULTRASUPER Chain. A type, B type,and C type RS sprockets aresuitably strong.(Use SS400, S35C, SC450, etc.)(4)For high-speed sprockets, use asprocket with hardened toothtips.(5)Be sure to lubricate roller chain,as the bearing pressure risesvery high.* Allow an 80% reductionfor M type connectinglinks for RS15, 25, 37,38, 41, BF25-H, 05B,06B, 48B, 56B andCorrosion Resistant rollerchain RS-KT.141The speed limit for PolySteel Chain is 70 m/min.
Selecting a Roller ChainReducer ratioi = 50kW 11Rated torque Tn=9.55 =9.55 =0.058 (kNm)n1 1800Starting torque Ts=Tn2=0.0582=0.116 (kNm)Stalling torque Tb=Tn2.1=0.0582.1=0.122 (kNm)Motor moment of inertia Im=0.088 (kgm 2 )Driven shaft revolution1000n2=Speed of transport (External diameter of conveyor roller+2Belt thickness)1000=30 =23.9 (r/min)(380+20)Drive shaft revolution1800n=Motor rotation/i= =36 (r/min)5023.9 1Chain reducer ratio= = 36 1.51If the driven sprocket d2=400mm2Chain tension Fw=Conveyor roller rotation torque1000 d22= 3.31000 =16.5 (kN)400Sprocket outer diameter 400 mm(Distancebetween shafts)Drive Roller ChainConditionsMachine used: Conveyor driveChain load M: 6000 kgChain speed: 30 m/minConveyor roller diameter: 380 mmBelt thickness: 10 mmConveyor roller rotation torque: 3.3 kN/m (337 kg/m)Motor : 11 kW n1 = 1800 r/minStart torque 200%Stop (maximum) torque 210%Moment of inertia 0.088 kg/m 2(GD 2 0.352 kgf/m 2 )SI Units(Step 1) Check motor characteristics(Step 2) Calculate from loadReducer ratio: 1/50 (i = 50)Drive shaft diameter: 66 mmDriven shaft diameter: 94 mmDistance b/w shafts: 500 mmDriven sprocket diameter 400 mmStarting frequency: 10 times/dayType of shock: Moderate shockSoft start/stop: None{Gravimetric units}(Step 1) Check motor characteristicskW 11Rated torque Tn=9.74 =9.74 =5.95 (kgfm)n1 1800Starting torque Ts=Tn2=5.952=11.9 (kgfm)Stalling torque Tb=Tn2.1=5.952.1=12.5 (kgfm)GD 2 of the motor GD 2 m=0.352 (kgfm 2 )(Step 2) Calculate from loadDriven shaft revolution1000n2=Speed of transport (External diameter of conveyor roller+2Belt thickness)1000=30 =23.9 (r/min)(380+20)Drive shaft revolution1800n=Motor rotation/i= =36 (r/min)5023.9 1Chain reducer ratio= = 36 1.51If the driven sprocket d2=400mm2Chain tension Fw=Conveyor roller rotation torque1000 d22= 3371000 =1690 (kgf)400Before Use For Safe Use Standard Roller Chains Lube-Free Roller Chains Heavy Duty Roller Chains Corrosion Resistant Roller Chains Specialty Roller Chains Accessories Selection HandlingTentatively select the chain.With moderate shockUsage factor Ks=1.3Tentative design chain tension = FwKs=16.51.3=21.5 (kN)Tentatively select the RS120-1 with a maximum allowableload of 30.4 kN.Tentatively select the chain.With moderate shockUsage factor Ks=1.3Tentative design chain tension = FwKs=16901.3=2200 (kgf)Tentatively select the RS120-1 with a maximum allowableload of 3100 kgf.142
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Selecting a Roller ChainReducer ratioi = 50kW 11Rated torque Tn=9.55 =9.55 =0.058 (kNm)n1 1800Starting torque Ts=Tn2=0.0582=0.116 (kNm)Stalling torque Tb=Tn2.1=0.0582.1=0.122 (kNm)Motor moment of inertia Im=0.088 (kgm 2 )Driven shaft revolution1000n2=Speed of transport (External diameter of conveyor roller+2Belt thickness)1000=30 =23.9 (r/min)(380+20)Drive shaft revolution1800n=Motor rotation/i= =36 (r/min)5023.9 1Chain reducer ratio= = 36 1.51If the driven sprocket d2=400mm2Chain tension Fw=Conveyor roller rotation torque1000 d22= 3.31000 =16.5 (kN)400Sprocket outer diameter 400 mm(Distancebetween shafts)Drive Roller ChainConditionsMachine used: Conveyor driveChain load M: 6000 kgChain speed: 30 m/minConveyor roller diameter: 380 mmBelt thickness: 10 mmConveyor roller rotation torque: 3.3 kN/m (337 kg/m)Motor : 11 kW n1 = 1800 r/minStart torque 200%Stop (maximum) torque 210%Moment of inertia 0.088 kg/m 2(GD 2 0.352 kgf/m 2 )SI Units(Step 1) Check motor characteristics(Step 2) Calculate from loadReducer ratio: 1/50 (i = 50)Drive shaft diameter: 66 mmDriven shaft diameter: 94 mmDistance b/w shafts: 500 mmDriven sprocket diameter 400 mmStarting frequency: 10 times/dayType of shock: Moderate shockSoft start/stop: None{Gravimetric units}(Step 1) Check motor characteristicskW 11Rated torque Tn=9.74 =9.74 =5.95 (kgfm)n1 1800Starting torque Ts=Tn2=5.952=11.9 (kgfm)Stalling torque Tb=Tn2.1=5.952.1=12.5 (kgfm)GD 2 of the motor GD 2 m=0.352 (kgfm 2 )(Step 2) Calculate from loadDriven shaft revolution1000n2=Speed of transport (External diameter of conveyor roller+2Belt thickness)1000=30 =23.9 (r/min)(380+20)Drive shaft revolution1800n=Motor rotation/i= =36 (r/min)5023.9 1Chain reducer ratio= = 36 1.51If the driven sprocket d2=400mm2Chain tension Fw=Conveyor roller rotation torque1000 d22= 3371000 =1690 (kgf)400Before Use For Safe Use Standard Roller Chains Lube-Free Roller Chains Heavy Duty Roller Chains Corrosion Resistant Roller Chains Specialty Roller Chains Accessories Selection HandlingTentatively select the chain.With moderate shockUsage factor Ks=1.3Tentative design chain tension = FwKs=16.51.3=21.5 (kN)Tentatively select the RS120-1 with a maximum allowableload of 30.4 kN.Tentatively select the chain.With moderate shockUsage factor Ks=1.3Tentative design chain tension = FwKs=16901.3=2200 (kgf)Tentatively select the RS120-1 with a maximum allowableload of 3100 kgf.142
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