SA-XZ120 waa servo motor rotary mashiin si toos ah, awoodda mishiinku waa xoog badan yahay, ku haboon diirka 120mm2 gudaha silig weyn, Mashiinkan waxaa si ballaaran loo isticmaalaa in silig tamarta cusub, silig jaakad weyn iyo fiilada korontada, isticmaalka iskaashiga mindi double, Mindida rotary ayaa mas'uul ka ah jarista jaakadda, Midida kale ayaa mas'uul ka ah jarista siliga iyo jaakadda dibadda ka soo bixisa. Faa'iidada muraayadda rotary waa in jaakad la gooyn karo si siman iyo saxsanaan sare oo sax ah, si saamaynta maqaarka ee jaakada dibadda ay ugu fiican tahay oo aan burrin lahayn, hagaajinta tayada alaabta.