Mgbaji siri ike n'ihe gbasara nha ọka na ọdịnaya cobalt.
Mgbe ihe na-ekpughe ihe na nrụgide mpụga, nke a na-eduga n'ọgba aghara n'ibu.N'okpuru ọnọdụ ndị a, ma ike na ductility nke ihe onwunwe na-egosi ihe ndabere maka echiche nke siri ike.N'ikwu ya n'ụzọ ọzọ, a na-akọwa ike siri ike dị ka ikike iguzogide mgbaji ma ọ bụ nkwụsịtụ.A na-etinyekarị "Ụzọ Palmqvist" iji chọpụta uru siri ike, KIC.
Biko kọwaa dị ka ndị a maka ịtụ:
* Akụrụngwa nke waya, Carbon Steel dị ala.Ọkara Carbon Steel.Elu Carbon Steel.Stainless Steel.Brass.Aluminium.Iron.Optimum with Code of Materials.
* Ụdị isi, biko kọwaa mgbe ị na-eji washer isi.
* Oghere skru, biko kọwaa mgbe ejiri skru oghere.
* Ịghasa triangle,biko kọwapụta dayameta waya mgbe ejiri ya skru triangle.
* Skru na-abụghị ọkọlọtọ, biko tinye eserese ma ọ bụ ihe nlele mgbe ejiri ya maka ịghasa na-abụghị ọkọlọtọ.
Ajụjụ a na-ajụkarị na iji screw na nut mold:
1. Onye ọrụ nna ukwu nwere ahụmahụ nke ịkpụzi na nhazi nhazi , na-enyocha ihe kpatara nkesa na-enweghị ezi uche na-akpata ọnwụ nchekasị na nrụrụ.
2.The ịdị ọcha nke ebu, ime oghere ime ezughị.
3.The rigidity nke shei aka uwe ihe, okpomọkụ na-eguzogide, na okpomọkụ ọgwụgwọ ekweghị ekwe.
4.In iji chekwaa ego nke mmepụta, ha na-ahọrọ adịghị mma tungsten carbide ígwè na mkpanaka waya, nkọwa alloy na-ezu ohi ihe nailing akwa wiil ndị na-enweghị ezi uche.
5.The collider adịghị mma, na-enweghị dochie lubricants na elele igwe ogologo oge.
6.The nna ukwu ọrụ nke mmezi ga-enwe elu oru larịị.