Izici ze-helical gears:
1. Lapho uhlanganisa amagiya amabili angaphandle, ukuzungezisa kwenzeka ngakolunye uhlangothi, lapho kuxhunywa i-ger yangaphakathi ngegiya langaphandle ukuzungezisa kwenzeka ohlangothini olufanayo.
2. Kufanele kuqashelwe ngenani lamazinyo egiyeni ngalinye lapho kuxhunywa igiya elikhulu (langaphakathi ) elinegiya elincane (langaphandle), njengoba kungase kwenzeke izinhlobo ezintathu zokugxambukela.
3. Imvamisa amagiya angaphakathi ashayelwa amagiya amancane angaphandle
4. Ivumela umklamo ohlangene womshini
Ukusetshenziswa kwamagiya angaphakathi:iplanethi yegiya yokushayela izilinganiso zokunciphisa okuphezulu, ama-clutch njll.