ʻO Grab backet kahi mea hana kūikawā no nā cranes e hopu i ka ukana maloʻo nui. Hoʻokumu ʻia ka hakahaka o ka pahu i ʻelua a ʻoi aʻe paha nā iwi ā hiki ke wehe a pani ʻia. I ka wā e hoʻouka ai, ua pani ʻia nā ʻāwae i loko o ka puʻu waiwai, a hopu ʻia ka mea i loko o ka pahu pahu. I ka wehe ʻana, aia nā ʻauwae i ka puʻu waiwai. Wehe ʻia ma lalo o ka mokuʻāina i hoʻokuʻu ʻia, a hoʻopuehu ʻia ka mea ma luna o ka puʻu waiwai. ʻO ka wehe ʻana a me ka pani ʻana o ka pā aie e hoʻomalu mau ʻia e ke kaula uwea o ka mīkini hoʻokiʻekiʻe o ka crane.Grab bakeke hana ʻaʻole koi i ka hana lima lima kaumaha, hiki ke hoʻokō i ka hoʻouka kiʻekiʻe a me ka hoʻokuʻu ʻana i ka pono a hōʻoia i ka palekana. ʻO ia ka mea paʻahana lawe ukana nui maloʻo ma nā awa. E like me nā ʻano o nā mea hana, hiki ke hoʻokaʻawale ʻia i ka ʻai ʻana, ka lānahu, ka palaoa, ka lāʻau, etc.
Hiki ke hoʻokaʻawale ʻia ka hopu i ʻelua mau ʻāpana e like me ke ʻano hoʻokele: hydraulic hopu a me mechanical grab. Hoʻokomo ʻia ka hydraulic grab me kahi ʻano wehe a pani ʻia, a ke alakaʻi ʻia nei e kahi cylinder hydraulic. ʻO ka hopu hydraulic i haku ʻia me nā pā ʻāwae lehulehu ua kapa ʻia ʻo ia he maʻi hydraulic. Hoʻohana nui ʻia nā pahu hopu hydraulic i nā mea hana kūikawā hydraulic, e like me nā hydraulic excavators, hydraulic lifting towers, etc. E like me nā hiʻohiʻona hana, hiki ke hoʻokaʻawale ʻia i ke kaula lua a me kahi kaula kaula hoʻokahi.
ʻO ka hāʻule maʻamau o ka hoʻohana ʻana i nā bākeke hopu ʻo ia ka lole abrasive. Wahi a ka nānā ʻana i nā ʻikepili pili, hiki ke ʻike ʻia ma waena o nā ʻano hemahema o ka hopu ʻana i nā bākeke, ma kahi o 40% o nā ʻano hana hemahema i nalowale ma muli o ke kāʻei ʻana i ka pine, a ma kahi o 40% ua nalowale ma muli o ke komo ʻana o nā ʻaoʻao o ka bakeke. Ma kahi o 30%, a ma kahi o 30% o ka nalowale o ka hana hana ma muli o ke kapa pulley a me nā ʻāpana ʻē aʻe. Hiki ke ʻike ʻia ʻo ka hoʻomaikaʻi ʻana i ka pale ʻana o ka pine pine a me ka bushing o ka pahu hopu a me ka hoʻomaikaʻi ʻana i ka pale ʻana o ka ʻaoʻao o ka bākeke he mau ala nui e hoʻomaikaʻi ai i ke ola lawelawe o ka pahu hopu. I mea e hoʻomaikaʻi ai i ke ola lawelawe o ka pahu hopu, koho kā mākou hui i nā mea ʻaʻahu ʻokoʻa e like me nā kūlana like ʻole o kēlā me kēia ʻāpana ʻāpana o ka pahu hopu, a hoʻohui iā ia me nā ʻano hana hana like ʻole, a laila e hoʻomaikaʻi nui ai i ke ola lawelawe o ka. hopu bakeke.