Izici ze-helical gears:
1. Uma uhlanganisa amagiya amabili angaphandle, ukuzungezisa kwenzeka ngakolunye uhlangothi, uma kuxhunywa i-igiya langaphakathingegiya langaphandle ukuzungeza kwenzeka ngendlela efanayo.
2. Kufanele kuqashelwe ngenani lamazinyo egiyeni ngalinye lapho kuxhunywa igiya elikhulu langaphakathi ngegiya elincane langaphandle, njengoba kungase kwenzeke izinhlobo ezintathu zokugxambukela.
3. Imvamisa amagiya angaphakathi ashayelwa amagiya amancane angaphandle
4. Ivumela umklamo ohlangene womshini
Ukusetshenziswa kwamagiya angaphakathi: izinto zeplanethiukushayela kwezilinganiso eziphezulu zokunciphisa, ama-clutches njll.