TORSION 83-2 EXTERNAL TORQUE OF A TRANSMISSION SHAFT INTERNAL TORQUE AND ITS DIAGRAM 1\ External torque of a transmission shaft The relation between the transmission power, revolution and external torque of the transmission shaft where: P-power, unit: kilowatt(kW m=9.55(kNm) n-rotational speed unit: r/min or(rpm) where: P-power, unit: horsepower(HP) m=7.024(kNm) n- rotational speed unit: r/min or (rpm) where: P-power, unit: kilowatt(kW) m=7.121-(kN·m) n- rotational speed, unit: r/min or (rpm) 1PS=7355Nm/s,1HP=7457Nm/s,1kW=1.36PS11 §3–2 EXTERNAL TORQUE OF A TRANSMISSION SHAFT INTERNAL TORQUE AND ITS DIAGRAM 1、External torque of a transmission shaft The relation between the transmission power, revolution and external torque of the transmission shaft： = 9 55 (kN m) n P m . = 7 024 (kN m) n P m . = 7 121 (kN m) n P m . where：P - power, unit: kilowatt (kW) n – rotational speed, unit: r/min or（rpm） where：P - power, unit: horsepower (HP) n – rotational speed, unit: r/min or（rpm） where：P - power, unit: kilowatt (kW) n – rotational speed, unit: r/min or（rpm） 1PS=735.5N·m/s , 1HP=745.7N·m/s , 1kW=1.36PS