Bevel gear ɲinw bɛ labɛn kon dɔ la, wa u bɛ dɔgɔya dɔɔni dɔɔni ka bɔ a dakunba la ka se a dakun fitinin ma. A bɛ bɛn 'cylinders' ma min bɛ tali kɛ spur gears kɔnɔ, i n'a fɔ pitch silinda, addendum cylinder, ani base cylinder, in bevel gears ninnu bɛ kɛ 'cones,' i n'a fɔ pitch cone, face cone, base cone, ani addendum cone. Bevel gears bɛ kɛ ka fanga lase jiribolo fila cɛ minnu bɛ ɲɔgɔn cɛ. σ sɛrɛkili min bɛ jirisun fla ninnu cɛ, o bɛ Weele ko jiribolo-yɔrɔ, wa a nafa bɛ Se ka Labɛn ka Kɛɲɛ ni 'sènfɛ-sira ye, n'o ye 90° ye min bɛ Kɛ ka caya.