Dual ụzọgia worm na worm wheel bụ ụdị ngwa ngwa eji maka nnyefe ike. Ọ mejupụtara ikpuru, nke bụ ịghasa dị ka cylindrical akụrụngwa na helical ezé, na a worm wheel, nke bụ gia nwere ezé na ntupu na ikpuru.
Okwu a na-akpọ dual lead na-ezo aka n'eziokwu ahụ bụ na ikpuru nwere ezé abụọ, ma ọ bụ eri, na-ekekọta gburugburu cylinder n'akụkụ dị iche iche. Nke a imewe na-enye a elu gia ratio tụnyere otu ndu worm, nke pụtara na ikpuru wheel ga-atụgharị ọzọ ugboro kwa mgbanwe nke ikpuru.
Uru nke iji eriri ụzọ abụọ na worm wheel bụ na ọ nwere ike nweta oke gia na nhazi kọmpat, na-eme ka ọ baa uru na ngwa ebe ohere dị oke. Ọ bụkwa ihe na-akpọchi onwe ya, nke pụtara na ikpuru nwere ike ijide wheel worm na-enweghị mkpa breek ma ọ bụ usoro mkpọchi ọzọ.
A na-ejikarị sistemu wheel worm worm na igwe worm eme ihe n'ime igwe na akụrụngwa dịka sistemu mbufe, akụrụngwa ebuli, na ngwa igwe.