Uhlu lweeBolts

1.Hlela ngokwemilo yentloko:

（1）Ibholithi yentloko enamacangca: Olu lolona hlobo luqhelekileyo lwebholithi. Intloko yayo inamacangca asibhozo, kwaye inokuqiniswa okanye ikhululwe lula ngesikrufu sehex. Isetyenziswa kakhulu kumashishini ahlukeneyo afana nokuvelisa oomatshini, iimoto, kunye nokwakha, njengokudibanisa iibhloko zesilinda zenjini yeemoto.

（2）Ibholthi ye-Countersunk: Intloko yayo ijiyile kwaye ingatshona ngokupheleleyo kumphezulu wenxalenye edibeneyo, nto leyo eyenza umphezulu woqhagamshelo ube tyaba. Olu hlobo lwebholthi luluncedo kakhulu kwiimeko apho kufuneka inkangeleko, njengaxa kuhlanganiswa ifenitshala, iibholthi ze-countersunk zisetyenziselwa ukuqinisekisa umphezulu ogudileyo nomhle.

（3）Ibholithi yentloko yepani: Intloko imile okwediski, intle ngakumbi kuneebholithi zentloko ezineehexagonal, kwaye inokubonelela ngendawo enkulu yokunxibelelana xa iqinisiwe. Ihlala isetyenziselwa iindawo zonxibelelwano ezifuna imbonakalo ephezulu kwaye zikwafuna ukumelana namandla athile okuxinana, njengokulungisa iqokobhe langaphandle lezixhobo zombane.

2. Ihlelwe ngokweprofayili yomsonto
（1）I-bolt yomsonto oqinileyo: I-pitch yayo yomsonto inkulu kwaye i-engile yomsonto inkulu, ngoko ke xa ithelekiswa ne-bolt yomsonto ocolekileyo, ukusebenza kwayo okuzitshixayo kubi kancinci, kodwa inamandla aphezulu kwaye kulula ukuyiqhekeza. Kwezinye iimeko apho kufuneka amandla aphezulu oqhagamshelo kwaye ukuchaneka okuphezulu akufuneki, njengasekwakheni uqhagamshelo lwesakhiwo, idla ngokusetyenziswa.
（2）Ibholthi yomsonto ocolekileyo: Ibholthi yomsonto ocolekileyo inepitch encinci kunye ne-engile yomsonto omncinci, ngoko ke inamandla amahle okuzitshixa kwaye inokumelana namandla amakhulu asecaleni. Isetyenziswa rhoqo kwiimeko ezifuna uqhagamshelo oluchanekileyo okanye ukumelana nokungcangcazela kunye nemithwalo yempembelelo, njengokuhlanganiswa kwezixhobo ezichanekileyo.

3. Ihlelwe ngokwenqanaba lokusebenza
（1）Iibholithi eziqhelekileyo eziyi-4.8: zinezinga lokusebenza eliphantsi kwaye zihlala zisetyenziswa kwiimeko apho iimfuno zamandla oqhagamshelo zingekho phezulu kakhulu, njengeendibano zefenitshala eziqhelekileyo, uqhagamshelo olulula lwesakhelo sesinyithi, njl.njl.
（2）Iibholiti ezinamandla aphezulu: Zinamandla aphezulu kwaye zihlala zisetyenziselwa uqhagamshelo lwesakhiwo olunokumelana namandla amakhulu okuxinana okanye ukucheba, njengezakhiwo zesakhiwo sentsimbi, iibhulorho ezinkulu, oomatshini abanzima, njl.njl., ukuqinisekisa ukhuseleko kunye nokuzinza kwesakhiwo.