These pansi molunjikakulimbikitsa magiya amagwiritsidwa ntchito pochepetsa ma cylindrical,zomwe zili m'magiya akunja. Zinali zotsika, zolondola kwambiri ISO6-7 .Zinthu :20MnCr5 zokhala ndi kutentha kwa carburizing, kuuma kwake ndi 58-62HRC .Njira yapansi imapangitsa phokoso laling'ono ndikuwonjezera moyo wa magiya.