Ke ho?ohana nei i ka 40Cr a i ?ole 42CrMo ma ke ?ano he kumu kumu, ?o ka pololei i ho?opa?a ?ia i ka blank e hana ma?amau, huli ?ana, hobbing gear, carbonitriding, insulation thermal and tempering, wili maika?i o ka pō?ai i loko, a me kahi ?ano o nā lā?au anti-rust ?O ia ka HRC58- HRC62, ka hana maika?i, a me ka nānā pono ?ana i nā huahana i ho?opau ?ia.

Loa?a nā ?ano ho?olālā ?ili niho i ho?opa?a ?ia no nā mea ho?ohana e koho mai: ?ano niho herringbone, ?ano ?ano puka poepoe meli, ?ano hui hui niho pololei, ?ano niho helical nui, ?ano niho pololei ma?amau, a ma o ke ?ano niho.

?O ka mīkini wili concentric ki?eki?e e hō?oia i ka ho?opili pono ?ana o ka pō?ai i loko o ka ?ōwili pa?i i nā bearings o ka mea ho?ohana, a me nā koi coaxiality o nā pō?ai i loko a me waho o ka ?ōwili kaomi.