Kua whakamahia e ngā mīhini katoa ēnei, engari ko te nuinga kāore i te mōhio ki te maha o ngā momo horoi rerekē, he aha ngā rauemi i hangaia ai, me pēhea te whakamahi tika. I roto i ngā tau, he maha ngā pātai kua tae mai ki a mātou mō ngā horoi, nō reira kua roa te wā e hiahiatia ana kia tukuna he tuhinga hangarau e whakapuaki ana i ngā mōhiohio mō ēnei taputapu pūmārō.

Nō nā tata nei mātou i kōrero mō te toi o te hanga whakapiripiri mahi-teitei me Automotive Racing Products, Inc. (ARP), me te kōrero whānui mō ngā nati me ngā pūtu o te kaupapa. Kua tae ki te wā ki te whakaute i te wāhanga whakapiripiri e kore e whakaarohia whānuitia, arā, te mīhini horoi iti.

I ngā pararāfu e whai ake nei, ka matapakihia e tātou he aha ngā mīhini horoi, ngā momo mīhini horoi rerekē, ā rātou mahi, te āhua o te hanga, te wāhi me te wā e whakamahia ai – āe, ka matapakihia hoki mēnā he anga whakahāngai ngā mīhini horoi, kāore rānei.

I te nuinga o te wā, he pereti rite ki te kōpae te mīhini horoi, he kōhao kei waenganui. Ahakoa te āhua taketake o te hoahoa, he mahi uaua tonu ngā mīhini horoi. He mea whakamahi noa ēnei hei tohatoha i te kawenga o te here miro, pērā i te pūtu, i te tīwiri taupoki rānei.

Ka taea hoki te whakamahi hei āputa - i ētahi wā rānei - hei papa kakahu, hei taputapu raka, hei whakaiti rānei i te wiri - pērā i te mīhini horoi rapa. Ko te hoahoa mīhini horoi taketake he diameter o waho e rua te rahi atu i te diameter o roto o te mīhini horoi.

He mea hanga ki te konganuku te nuinga o te wā, ā, ka taea hoki te hanga i ngā horoi ki te kirihou, ki te rapa rānei — i runga i te whakamahinga. I roto i ngā mīhini, me whakamahi ngā horoi maitai whakapakeke mō ngā hononga pūmau kounga teitei hei ārai i te kōpikopiko o ngā mata o te hononga. Ka kiia tēnei ko te Brinelling. Ka taea e ēnei kōpikopiko iti te arahi ki te ngaronga o te utaina mua i runga i te whakapiri, te haruru, te wiri nui rānei. I te haere tonu o te āhua, ka tere ake ēnei nekehanga ki tētahi atu kakahu e tautuhia ana ko te spalling, te galling rānei.

Ka āwhina hoki ngā horoi ki te ārai i te waikura galvanic, he āhuatanga e puta ana ina pā atu ētahi konganuku tetahi ki tetahi. Ka mahi tetahi konganuku hei anode, ko tetahi hei cathode. Hei whakaroa, hei ārai rānei i tēnei tukanga mai i te tīmatanga, ka whakamahia he horoi i waenganui i te pūtu, i te nati rānei me te konganuku e honoa ana.

Haunga te tohatoha ōrite i te pēhanga ki runga i te wāhanga e mau ana, me te whakaiti i te tūponotanga o te pakaru, ka whakaratohia hoki e ngā whakamāri he mata maeneene mō te nati, te pūtu rānei. Mā tēnei ka iti ake te tūponotanga o te wetewete o te hononga kua mau ki te whakataurite ki te mata mau kāore i te ōrite.

He momo horoi motuhake kua hangaia hei hiri, hei pūtake whenua hiko, hei whakarite i te hononga, hei pupuri i te hononga, hei ārai i te hononga, hei whakarato rānei i te pēhanga tuaka ki te hononga. Ka matapakihia e tātou ēnei horoi motuhake i roto i te tuhinga i raro nei.

Kua kite hoki mātou i ētahi huarahi hei whakamahi hē i ngā horoi hei wāhanga o te hononga kua herea. He maha ngā wā i whakamahia ai e ngā miihini rakau-marumaru ngā pūtu, ngā nati rānei he iti rawa te whānui mō te wāhanga e honoa ana. I ēnei wā, he whānui o roto o te horoi e uru ana ki te pūtu, engari, kāore e tukua te pane pūtu, te nati rānei kia paheke i roto i te poka o te wāhanga e honoa ana. He raru nui tēnei, ā, kaua rawa e whakamātauria i hea atu i runga i te motuka reihi.

I te nuinga o te wā, ka whakamahia e ngā mekanika he pūtu roa rawa, engari kāore i te rawaka ngā miro, ā, kāore e taea te whakakīkī i te hononga. Me karo hoki i te whakatakoto i te ringa o ngā wūru ki runga i te kakau hei wehewehe kia taea rā anō te whakakīkī i te nati. Kōwhiria te roa tika o te pūtu. Ki te kore e tika te whakamahi i ngā wūru, ka raru pea, ka whara rānei.

I te nuinga o te wā, he maha ngā momo horoi e hangaia ana i te ao i ēnei rā. Ko ētahi he mea hanga mō ngā hononga rakau, ko ētahi he mea hanga mō ngā mahi paipa. Mō ngā hiahia motuka, e kī ana te tohunga R&D o ARP, a Jay Coombes, e rima noa iho ngā momo e whakamahia ana mō te tiaki motuka. Ko te horoi noa (te horoi papatahi rānei), te horoi parepare, te horoi wehe (te horoi raka rānei), te horoi whetu, me te horoi whakauru.

He mea whakamīharo, kāore koe e kite i tētahi mīhini horoi wehewehe i roto i ngā tuku whakapiri nui a ARP. "He mea whai hua ēnei mō ngā whakapiri iti te diameter i ngā āhuatanga kawenga iti," te whakamārama a Coombes. Ko te arotahi a ARP ki ngā whakapiri reihi mahi teitei e mahi ana i raro i ngā āhuatanga kawenga teitei. He momo momo o ēnei momo mīhini horoi e mahi ana i ngā kaupapa motuhake, pērā i te mīhini horoi noa me ngā niho i raro.

Ko te whakakā papatahi te takawaenga pai rawa atu i waenga i te pane o te pūtu (nati rānei) me te mea e piri ana. Ko tōna kaupapa matua he hora i te kawenga o te here kua whakakīia kia kore ai e pakaru te mata e hono ana. "He mea nui rawa atu tēnei mō ngā wāhanga konumohe," te kī a Coombes.

Kua whakaratohia e te American National Standards Institute (ANSI) he huinga paerewa mō te whakamahinga whānui, e rua ngā momo mō ngā mīhini horoi noa. Ko te Momo A he mīhini horoi me ngā āheinga whānui, kāore e nui te tika. Ko te Momo B he mīhini horoi papatahi me ngā āheinga kikī ake, ko ngā diameter o waho he whaiti, he auau, he whānui rānei mō ō rātou rahi pūtu (diameter o roto).

E ai ki tā mātou i kōrero ai i mua, he uaua ake ngā mīhini horoi i tētahi whakamārama ngāwari mai i tētahi whakahaere. Inaa, he maha. E whakarōpūtia ana e te Society of Automotive Engineers (SAE) ngā mīhini horoi papatahi i runga i te matotoru o ngā rauemi, me ngā diameter o roto me waho he iti ake i te whakataurite ki te whakamāramatanga a te whakahaere United States Standards (USS) mō ngā mīhini horoi papatahi.

Ko ngā paerewa USS ngā paerewa mō ngā mīhini horoi inihi-rahi. Ka whakaahuahia e tēnei whakahaere te diameter o roto, o waho hoki o te mīhini horoi kia uru ai ngā miro pūtu matotoru, nui ake rānei. He maha ngā whakamahinga o ngā mīhini horoi USS i roto i ngā mahi motuka. E toru ngā whakahaere e tohu ana i ngā paerewa rerekē e toru mō ngā mīhini horoi noa, he mārama he uaua ake ngā mīhini horoi i tā te āhua ngāwari e whakaaro ai te tangata.

E ai ki a Coombes o ARP, "Me āta whakaaro ki te rahi me te kounga o te mīhini horoi. Me nui te matotoru me te rahi hei tohatoha tika i te kawenga." Ka tāpiri atu a Coombes, "He mea nui hoki kia ōrite te whenua o te mīhini horoi, kia papatahi hoki mō ngā mahi nui me ngā kawenga taipana teitei ake. Ko ētahi atu mea ka taea te whakaputa i te utaina mua kāore i te ōrite."

He mīhini horoi ēnei he whānui rawa te diameter o waho, he rite ki tōna kōhao waenga. He mea hanga hoki hei tohatoha i te kaha piri, engari nā te rahi, ka horahia te kawenga ki tētahi wāhi nui ake. Mō ngā tau maha, i whakamahia ēnei mīhini horoi hei tāpiri i ngā parepare ki ngā waka, nō reira te ingoa. Tērā pea he whānui rawa te diameter o waho o ngā mīhini horoi parepare, engari he mea hanga i te nuinga o te wā mai i te rauemi angiangi.

He ngāwari ā-tuaka ngā horoi wehewehe, ā, e whakamahia ana hei ārai i te wetekina nā te wiri. Whakaahua mai i www.amazon.com.

He ngāwari ā-tuaka ngā horoi wehe, e kiia ana hoki ko ngā horoi puna, ko ngā horoi raka rānei. Ka whakamahia ēnei hei ārai i te wetekina nā te wiri. He māmā noa te ariā kei muri i ngā horoi wehe: He rite ki te puna hei pēhi i te mea e piri ana me te pane o te pūtu, o te nati rānei.

Kāore a ARP e hanga i ēnei whakakā nā te mea ko te nuinga o ngā here e whai wāhi nui ana ki te miihini, te pūnaha taraiwa, te anga, me te whakatārewatanga ka whakakukūhia ki tētahi momo taipana motuhake, ka whakamahia te kaha whakakukū tika. He iti noa iho, he kore rānei he tūponotanga ka wetekina te here me te kore e whakamahi i tētahi taputapu.

E whakaae ana te nuinga o ngā miihini ka totoro te pūwero puna — ina whakatōkia ki ngā whakaritenga teitei ake — ki tētahi taumata. Ina tupu tēnā, ka ngaro te kaha o te pūwero wehe, ā, ka taea hoki te whakararu i te utaina tika o te hononga kua mau.

He taratara ngā whatu o ngā whakakai whetu e toro atu ana ki roto, ki waho rānei, hei ngau i te mata o te papa hei ārai i te wetekina o te whakapiri. Whakaahua mai i www.amazon.com.

He rite tonu te mahi a ngā horoi whetu ki te horoi wehewehe. Ko te kaupapa o ēnei he ārai i te wetekina o te whakapiripiri. He horoi ēnei he taratara e toro atu ana ki roto, ki waho rānei, hei ngau i te mata o te wāhanga. Ko te hoahoa, he "keri ki roto" ki te pane/nati o te pūtu me te papa hei ārai i te wetekina o te whakapiripiri. Ko ngā horoi whetu he mea whakamahi noa me ngā pūtu me ngā tīwiri iti ake e pā ana ki ngā wāhanga hiko.

Nā te aukati i te hurihuri, ā, nā reira ka pā ki te tika o te utaina i mua, kua akiakihia a ARP ki te hanga i ngā mīhini horoi motuhake he mea whakakoi te taha raro. Ko te whakaaro kia mau ki te taonga e piri ana, kia pumau ai te tūāpapa.

Ko tētahi atu mīhini horoi motuhake i hangaia e ARP ko te mīhini horoi momo-whakauru. He mea hanga ēnei hei tiaki i te tihi o ngā kōhao kia kore ai e mura, e hinga rānei te tihi o te kōhao. Ko ngā whakamahinga noa ko ngā pane rango, ngā wāhanga anga, me ētahi atu wāhi e hiahiatia ana he mīhini horoi.

He mea nui kia mōhio koe he mea nui te whakahinuhinu i te whakakī tika o te hinu. Haunga te paninga hinu ki ngā miro o te whakapiri, he mea pai kia pania he hinu iti ki raro i te pane o te pūtu (nati rānei) ki runga rānei o te mīhini horoi. Kaua rawa e pania he hinu ki raro i te mīhini horoi (ki te kore e kīia tētahi atu mea e ngā tohutohu tāutanga) nā te mea kāore koe e hiahia kia huri.

He mea tika kia whai whakaaro ngā tīma reihi katoa ki te whakamahinga tika o te mīhini horoi me te whakahinuhinu.

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