Imingxuma yokubalazigrunjwa kwibhodi yesekethe ngenaliti yoqhelwa entloko okanye imela yegong, kodwa ayinakugrunjwa (okt, isemingxunyeni). Inxalenye yotshintsho phakathi kodonga lomngxuma kwindawo engaphandle / enkulu yomngxuma kunye nodonga lomngxuma kwi-diameter encinci yomngxuma ihambelana nomphezulu we-pcb. Inxalenye edibanisa imingxuma emikhulu kunye nencinci yinqwelomoya, kungekhona inqwelomoya.

I-Counterbore isetyenziswa kakhulu kwiibhodi zeesekethe zentsimbi, ezifana ne-aluminium substrate kunye ne-copper substrate. I-metal substrate inamandla amakhulu omatshini kwaye akukho lula ukulimaza isakhiwo se-PCB.
Umngxuma wokutyhutyha, njengoko negama lisitsho, ukwangumngxuma ophumelayo, onokudlula kwizinto okanye ulwelo lobungakanani obufanelekileyo.
Umsebenzi ngulo:
a. Isetyenziselwa ukudibanisa kwaye ingenziwa ibe yintambo yomngxuma.
b. Yenza iisilinda zeenjini zepiston.
c. Ebomini, iimpahla kunye neebhulukhwe esizinxibayo zikwayimizekelo yezicelo zokungena emngxunyeni
Umngxuma jikelele we-crimping yi-copper plated plug-in hole.
Ngenxa yoyilo olukhethekileyo lonyawo lwento, inokudityaniswa ngokuqinileyo nomngxuma ngoxinzelelo lwesakhiwo emva kokufakwa emngxunyeni.
Inzuzo kukunciphisa iseti ye-solder ye-welding ye-welding amacandelo anjalo; Ukuba imingxuma enjalo ayidityaniswanga ekugqibeleni, kuya kuba lula ukutshintsha iindawo. Ngokuqinisekileyo, ukutshintshwa ngokuphindaphindiweyo kuya kuchaphazela ukuthembeka komngxuma.
Izikhonkwane ze-elementi ezifuna imingxunya yokukrazula zibonelelwa ngokubanzi ngomsebenzi wokwandisa, kunomsebenzi womsonto.
Amanye amacandelo aya kuthi adityaniswe kwakhona kamva xa amanye amacandelo edityanisiwe, ngoxa amanye engasayi kuthungelwa.

I-Counterbore yahlulwe yangamagama amathathu:
1. Gxila ngokupheleleyo intloko ye-fastener kumngxuma wokunyathela wenxalenye, ebizwa ngokuba yi-counterbore
2. Intloko yesiqhoboshi ayitshoniswanga ngokupheleleyo kumngxuma wokunyathela wenxalenye, ebizwa ngokuba yi-countersink.
3. Intloko yesiqhoboshi ayizukutshona kwindawo ngokwesiseko, kwaye kuphela umngxuma onomphezulu osicaba wenxalenye ebizwa ngokuba yi-fishhole.
Umahluko phakathi komngxuma we-countersunk kunye ne-countersunk hole kukuba inxalenye ephezulu yomngxuma we-bolt iphinda ihlaziywe: i-countersunk hole yisakhiwo se-cylinder esithe ngqo; Umngxuma we-countersunk uyisakhiwo se-degrees ezingama-45, esilula kunomngxuma we-countersunk.
 
Ukuhlaziywa okuphezulu komngxuma webholithi kunokwamkela intloko yebholiti, ukuze intloko yebholiti ingabi phezulu kunomhlaba ojikelezileyo.