Tfola kutsi umshini utawuhamba ngaliphi lijubane, nobe i-pulley loyidzingako kute ufinyelele i-rpm loyifunako. Kufaka i-slip ye-belt nelijubane le-motor.
rpm yemshini = rpm ye-motor × diameter ye-pulley ye-motor ÷ diameter ye-pulley yemshini, kususa cishe 1–2 % we-slip ye-V-belt. Ema-timing belt akena-slip.
Nga-50 Hz lijubane le-synchronous le-motor ye-4-pole ngu-1 500 rpm; nayilayishiwe ngalokugcwele ivame kuhamba cishe nga-1 440–1 480 rpm. Sebentisa lijubane lelise-nameplate.