MAKISHINKO ALL PRODUCTS GUIDE
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E-8JACKExample of selectionUse two sets of jacks in the following equipment, and lifting stroke is 300㎜in a minute, please select thejack model number. In addition, the usage load of one is 30KN, and the jack is self lock.(1)Select JA type from the list of products.(2)According to basic specification of JA (E-14),select JA050-H whose nominal capacity is 50KN.(3)It is suitable since 50KN at operation speed of-0.3m/min is permissible operation load perload speed chart (E-17).(4)Observe curve 2of permissible axial directionload (E-20)ηf=1L=530it is suitable since permissible axial directionload of JA050is 50kN.(5)Operation speed V=300mm/min, input shaftspeed N is:N=1000×R・VR=1000×7.67×0.38≒288(rpm)R:screw pitch, 8㎜ R:reduction ratio, 7.67V:operation speed, 0.3m/min(6)The required power is:Pw=n・W・V+N・T1・n60・ηJ・ηn9550=2×30×0.3+288×0.8×260×0.24×0.949550≒1.38kWηJ:jack efficiency, 0.24(JA specification table)ηn:connection efficiency, 0.94(connect 2sets)n:connected 2setsT1:no load torque. 0.8N.mN:input speed, 288rpm(7)The requires input torque T isT= 9550×Pw=9550×1.38N288= 45.7N・m<52N・mMAX530Conversion from previous unit to Sl unit1000kgf=9800N=9.8kN100kgf・m=980N・m=0.98kN・m

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