Countersunk mabowoamabowoleredwa pa bolodi lachigawo ndi singano yobowola mutu wathyathyathya kapena mpeni, koma sangathe kubowola (mwachitsanzo, theka kupyola mabowo).Gawo losinthira pakati pa khoma la dzenje pamtunda wakunja / waukulu kwambiri wa dzenje ndi khoma la dzenje laling'ono kwambiri limafanana ndi pcb pamwamba.Mbali yolumikiza mabowo akuluakulu ndi ang'onoang'ono ndi ndege, osati ndege yolowera.

Counterbore imagwiritsidwa ntchito kwambiri pama board ozungulira zitsulo, monga gawo lapansi la aluminiyamu ndi gawo lapansi lamkuwa.Gawo lachitsulo lili ndi mphamvu zamakina apamwamba ndipo sizovuta kuwononga mawonekedwe a PCB.
Bowolo, monga momwe dzinalo limatanthawuzira, ndibowo, lomwe limatha kudutsa muzinthu kapena zakumwa zakukula koyenera,
Ntchito yake ndi:
a.Amagwiritsidwa ntchito polumikizana ndipo amatha kupangidwa kukhala ulusi wodutsa-bowo.
b.Pangani masilinda a injini za pistoni.
c.M'moyo, zovala ndi mathalauza omwe timavala ndi zitsanzo za kugwiritsa ntchito mabowo
Bowo lalikulu la crimping ndi dzenje lapulagi la mkuwa.
Chifukwa cha kapangidwe kapadera ka phazi la chinthu, imatha kulumikizidwa mwamphamvu ndi dzenje ndi zovuta zake zomangika pambuyo poyikidwa mu dzenje.
Ubwino wake ndi kuchepetsa kutenthetsa soldering seti kwa kuwotcherera zigawo zimenezi;Ngati mabowo oterowo sakuwotcherera kumapeto, kudzakhala kosavuta kusintha magawowo.Inde, kubwereza mobwerezabwereza kudzakhudza kudalirika kwa dzenje.
Ma elementi omwe amafunikira ma crimping mabowo nthawi zambiri amapatsidwa ntchito yokulitsa, osati ntchito ya ulusi.
Zigawo zina zidzawotchedwanso pambuyo pake pamene zina zidzawotchedwa, pamene zina sizidzawotchedwa.

Counterbore imagawidwa m'maina atatu:
1. Mitseni kwathunthu mutu wa chomangira mu dzenje la gawolo, lotchedwa counterbore
2. Mutu wa chomangira sunamizidwe kwathunthu mu dzenje la gawolo, lomwe limatchedwa countersink.
3. Mutu wa chomangira sudzamira mu gawolo, ndipo dzenje lokhalo lomwe lili ndi malo athyathyathya la gawolo limatchedwa fishhole.
Kusiyanitsa pakati pa dzenje la countersunk ndi dzenje la countersunk ndikuti gawo lapamwamba la dzenje la bolt limabwerezedwanso: dzenje la countersunk ndi ndondomeko yowongoka ya silinda;Bowo la countersunk ndi mawonekedwe a digirii 45, omwe ndi osalala kuposa dzenje la countersunk.
 
Kukonzanso kumtunda kwa dzenje la bolt kumatha kukhala ndi mutu wa bolt, kotero kuti mutu wa bolt usakhale wapamwamba kuposa malo ozungulira.