Makhalidwe azida za helical:
1. Mukamangirira zida ziwiri zakunja, kuzungulira kumachitika mosiyana, pamene meshing ger yamkati ndi zida zakunja kuzungulira kumachitika mbali imodzi.
2. Chisamaliro chiyenera kutengedwa ponena za chiwerengero cha mano pa gear iliyonse pamene mukugwedeza zida zazikulu zamkati ndi zida zazing'ono zakunja, popeza mitundu itatu ya kusokoneza ikhoza kuchitika.
3. Kawirikawiri zida zamkati zimayendetsedwa ndi zida zazing'ono zakunja
4. Amalola makina opangidwa ndi makina
Kugwiritsa Ntchito Zida Zamkati:mapulaneti oyendetsa magiya otsika kwambiri, mabokosi a gearbox etc.