Kuphatikiza apo, ma drill athu amapereka njira yabwino kwambiri yowongolera ma chip kuti zitsimikizire kuti kuboola kuli kosalala komanso kosalekeza. Kuchotsa ma chip bwino kumateteza chip kutsekeka, kuchepetsa chiopsezo cha kuwonongeka kwa zida ndi nthawi yogwira ntchito. Izi zimapangitsa kuti drill ya BTA deep hole drill ya ZJ clamp igwire ntchito bwino, zomwe zimapangitsa kuti ikhale yoyenera ntchito zomangira zinthu zambiri.
Chobowoleracho chimagwiritsa ntchito masamba ophimbidwa ndi indexable ochokera kunja, omwe ali ndi ntchito yabwino kwambiri yokonza, kusintha masamba mosavuta, kugwiritsa ntchito thupi la chodulira kwa nthawi yayitali, kugwiritsa ntchito zida zochepa komanso zinthu zina. Chimatha kukonza chitsulo cha kaboni, chitsulo cha alloy champhamvu kwambiri, chitsulo chosapanga dzimbiri, ndi zina zotero.
Chimodzi mwa zinthu zodziwika bwino za mankhwalawa ndi njira yake yobowolera ya BTA (Boring and Trepanning Association), yomwe imatsimikizira kubowola molondola komanso kuchepetsa kugwedezeka ndikuwongolera ubwino wa mabowo. Izi zimapangitsa kuti ikhale yoyenera kugwiritsa ntchito zinthu zomwe zimafuna kulondola kwambiri, monga mafakitale oyendetsa ndege ndi magalimoto.
Kuphatikiza apo, chobowolera cha BTA cha mtundu wa ZJ cholumikizira machine clamp chomwe chimayikidwa mu BTA chimaperekanso kuyenda bwino kwa coolant kuti chitsimikizire kuti kutentha kumatuluka bwino panthawi yobowola. Izi zimaletsa kutentha kwambiri ndipo zimawonjezera nthawi ya zida, pamapeto pake zimachepetsa ndalama ndikuwonjezera magwiridwe antchito.
| Zofunikira pa kubowola | Yokhala ndi arbor | Zofunikira pa kubowola | Yokhala ndi arbor |
| Φ28-29.9 | Φ25 | Φ60-69.9 | Φ56 |
| Φ30-34.9 | Φ27 | Φ70-74.9 | Φ65 |
| Φ35-39.9 | Φ30 | Φ75-84.9 | Φ70 |
| Φ40-44.9 | Φ35 | Φ85-104.9 | Φ80 |
| Φ45-49.9 | Φ40 | Φ105-150 | Φ100 |
| Φ50-59.9 | Φ43 |
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