DRIVE CHAINS - Tsubaki

Selecting a Roller Chain4. Selection Formulae SI units and gravimetric units are both indicated4-1 Symbols and units used in formulae (Table 5)Symbol Description SI units Gravimetric unitsC Center distance in pitches C Center distance between shaftsm md Pitch circle diameter of the small sprocketmm mmd2Pitch circle diameter of the large sprocketmmmmD Outer diameter of the drummm mmFb Chain tension when the prime mover is decelerating (stalling)kN kfF b Design chain tension when the prime mover is decelerating (stalling)kN kfFC Chain tension of shuttle drivekN kfF C Design chain tension of shuttle drivekN kfF Chain tension from torque on load side (actual load)kN kfF Design chain tension from torque on load side (actual load)kN kfFm Chain tension from prime mover rated outputkN kfF m Design chain tension from prime mover rated outputkN kfFms Chain tension from starting torque of prime moverkN kfF ms Design chain tension from starting torque of prime moverkN kfFmb Chain tension from stalling torque of prime moverkN kfF mb Design chain tension from stalling torque of prime moverkN kfFs Chain tension when prime mover accelerates (starting)kN kfF s Design chain tension when prime mover accelerates (starting)kN kfFw Chain tension from load (actual load)kN kfF w Design chain tension from load (actual load)kN kff1Coefficient of friction between roller and rail (with lubrication 0.14, without lubrication 0.21) m/s 2 G Standard acceleration from gravity G = 9.80665 i Speed ratio (example) if ratio is 1/30 than i = 30 {GD 2 } Converted moment of inertia of the loaded prime mover output shaftk m 2 k fm 2m {GD 2 m} Moment of inertia of the prime mover output shaftk m 2 k fm 2K Shock factorRefer Table 4 Kn RPM factor Ks Service factorRefer Table 2 Ku Imbalance load factorRefer Table 5 Kv Speed factorRefer Table 3 Kz Number of teeth factor LChain length (number of links)m Unit mass of chaink /m kf/mM{W} Mass of load (weight)k k fCoefficient of friction between the rail and the axle = 0.1 (shuttle drive)Coefficient of friction between the rotating body and the support rollers = 0.3 (pin gear) n RPM of the small sprocketr/min rpmn1 RPM of driver shaftr/min rpmn2 RPM of driven shaftr/min rpmP Chain pitchmm mmR Inertia ratioRefer Table 4 S Attachment height for RS attachment chain (distance from the drum surface to the chain pitch center) mm mmtb The time for deceleration of the prime mover (when stalling)s stS The time for acceleration of the prime mover (when starting)s sTb Stalling torque of the prime mover%kNm %k fmTS Starting torque of the prime mover%kNm %k fmT Load torquekNm kfmTm Working torquekNm kfmTn Rated torque of the prime moverkNm kfmV Chain speedm/min m/minZ Number of teeth of large sprocket Z Number of teeth of small sprocket Before Use For Safe Use Standard Roller Chains Lube-Free Roller Chains Heavy Duty Roller Chains Corrosion Resistant Roller Chains Specialty Roller Chains Accessories Selection Handling136