WDrumLifting objectDtimetimet1t2t3n1n3n2T1T2T3tLoad torgueOutput speed21SA seriesSelection Example of Planetary Gear DriveIn the case of hoisting drum going up and down1.A calculation of the load torque(1)A driving pattern2.Examination of the allowable torque(Cf. rating list) 37Nm > 33.4 : Average load torque for 100W 3.Examination of the peak torque(Cf. rating list) Because it is unsuitable as 37Nm < 41.85Nm, you shall change to SA32S35 750W as 71Nm > 41.85Nm 4.Examination of the maximum torque at the time of an emergency(Cf. rating list) 5.Examination of the allowable radial load(Cf. rating list) 6.Examination of the allowable axial load(Cf. rating list) (2)The output torque in routine T2=9.8W・D/2=34.3Nm (3)Acceleration/Deceleration torque ①GD2 of the transporting object GD12=W・D2=1.40kgm2 ②GD2 of the drum GD22=2.00 by an extra calculation ③Acceleration torque T1=9.8GDt2・n/375t1=7.55Nm GDt2=GD12+GD22 ④Deceleration torque T3=9.8GDt2・n/375・t3=5.04Nm (4)Average load torque Tm={(t1T13+t2T23+t3T33)/(t1+t2+t3)}1/3=33.40Nm (5)The decision of the reduction ratio I=Nt/N=35.3 Nt:Rated input rotation speed (3000rpm) (6)The temporary selection of the model number from performance list (Select temporarily SA24S35) Select the most nearest value 35 from reduction ratio values.NotationW D Wd n V T1 T2 T3 t1 t2 t3Carrier weight Drum diameter Drum weight Output shaft speed Vertically motion speed Acceleration torque Torque in routine Deceleration torque Time in acceleration speed Time in routine speed Time in Deceleration speed Explanation初期値・単位 35kg 0.2m 20kg 85rpm 53.41m/min ※Nm ※Nm ※Nm 1sec 30sec 1.5sec