shiidid iyo shiidigears helicalsets for helical gearboxes waa habsocod taxadar leh oo u baahan saxnaan iyo khibrad. Hawshan qallafsan waxa ay ku lug leedahay adeegsiga mashiinno horumarsan si loo qaabeeyo loona nadiifiyo ilkaha gears-ka, hubinta in ay si fiican isula habboon yihiin. Naqshadeynta helical kaliya ma wanaajiso gudbinta korantada laakiin sidoo kale waxay yaraynaysaa khilaafka iyo buuqa. Marka lagu maro shiidid adag iyo shiidid adag, qalabyada qalabku waxay gaadhaan heer sare oo adkeysi iyo hufnaan, taas oo ka dhigaysa mid ku habboon codsiyada u baahan qulqul sare iyo hawlgal siman.
Tobanka shirkadood ee ugu sarreeya Shiinaha, qalabaysan 1200 shaqaale, helay wadarta 31 ikhtiraacida iyo shatiyada 9. Qalabka wax soo saarka sare, qalabka daaweynta kulaylka, qalabka kormeerka.