Rau lub hom phiaj ntawm koj lub tsheb kauj vab - thiab koj txoj kev nyab xeeb - nco ntsoov tuav koj lub cuab yeej nrog lub torque wrench
Raws dua li caij rau hauv phab ntsa, txoj hauv kev yooj yim tshaj los ua kom koj cov pa roj carbon monoxide puas yog los ntawm kev nruj dua. Qhov tseeb tias qhov tseem ceeb ntawm lub zog tam sim no tau sau rau ntawm cov khoom taw qhia lawv qhov tseem ceeb. Thiab thaum dhau-tightening txaus ntshai tsis ua hauj lwm, under-tightening tuaj yeem txaus ntshai rau qhov laj thawj pom tseeb. Koj yuav tsum tau ceev bolts nyob rau hauv ib txoj kev tswj, uas txhais tau tias kev nqis peev nyob rau hauv ib tug zoo torque wrench.
'Torque yog lub nra lossis lub zog siv nyob ib puag ncig ntawm lub axis, qhov no tig lub txiv ntoo lossis ntsia liaj qhov rooj,' hais tias Calvin Jones ntawm US cov cuab yeej loj Park Tool. ' Torque wrenches ntsuas qhov tsis kam ntawm lub fastener. Qhov tseem ceeb torque yog ib qho qhia txog qhov load, los yog nro, nyob rau hauv ib lub bolt, yog li ib qho kev ntsuas ntawm tus nqi ntawm lub zog nruj nws yog imparting.'
Ib qho kev xav tseem ceeb yog qhov muaj nuj nqis torque cuam tshuam los ntawm kev sib txhuam ntawm cov mating nto. Kev puas tsuaj, qias neeg los yog xeb xov yuav tsim kev sib txhuam ntau dua thiab ua rau lub bolt tsis kam tig, txhais tau tias nws yuav ncav cuag lub torque teem ntxov ntxov. Hloov pauv, roj thiab cov tshuab ntxhua khaub ncaws txo kev sib txhuam kom lub bolt tuaj yeem hloov pauv ntau dua kom ncav cuag tus nqi xav tau.
'Xav tias tseem ceeb,' Jones hais. 'Ib lub torque wrench tsis tuaj yeem qhia tau yog tias cov xov qhuav, hla txoj xov lossis yog lub ntsia liaj qhov rooj tau tawm hauv qab. Nws ntsuas tsis kam tig, yog txhua yam. Tus kws kho tsheb zoo yuav muaj kev nkag siab txog dab tsi fastener ua, thiab thaum twg yuav tsum tau ceev faj, piv txwv li thaum clamping ib yam dab tsi xws li ib tug carbon handlebar, raws li mus nruj heev yuav ua rau nws puas.'
Thaum haum cov khoom tshiab, ua raws li cov chaw tsim khoom cov lus qhia, raws li lawv yuav tau sim nrog cov roj hmab los yog ntxhua khaub ncaws. Yog tias koj nyob rau hauv ib qho kev tsis ntseeg, cov lus qhia zoo tshaj plaws yog kom haum bolts huv si thiab nyob rau hauv ib lub xeev oiled.
Ib qho teeb meem tshwm sim thaum muaj ob (lossis ntau dua) bolts rau tib lub clamp, ib yam li nrog qee lub stems thiab lub rooj clamps. Ntawm no nws yog ib qho tsim nyog yuav tsum tau ceev cov bolts me ntsis, nce zuj zus thiab sib npaug, kom txog thaum lub torque ciaj ntswj qhia tau tseeb ntawm txhua lub bolts.
Feem ntau cov torque wrenches ua haujlwm nrog lub tshuab tawg-tawm uas 'nias tawm' los qhia thaum twg qhov xav tau ntawm lub zog tau mus txog. Lwm tus muaj kev sib txhuam-raws li 'clutch' uas yuav yooj yim plam dhau qhov teeb tsa tus nqi torque. Txawm hais tias yuav ua li cas cov txheej txheem tso tawm, feem ntau yuav zoo sib xws hauv qhov 'ntsis' feem ntau tuaj yeem hloov pauv ntawm cov yuam sij allen thiab torx tsav tsheb raws li.
Bolts ntawm lub tsheb kauj vab tuaj yeem nyob hauv qhov chaw kaw, yog li ua ntej kev nqis peev xav txog seb koj xav siv nws li cas, thiab tus nqi torque uas koj xav tau kom ua tiav. Torque wrenches tuaj yeem kho tau nyob rau hauv ntau yam ntawm qhov tseem ceeb, lossis preset. Ntau qhov kev sib tw ntawm lub tsheb kauj vab pom zoo rau tus nqi torque ntawm 5Nm, yog li preset 5Nm wrenches tau nrov nrog cov tshuab vim lawv qhov yooj yim.
Koj yuav xav tau ntau tshaj ib qhov chaw los npog txhua daim ntawv thov txawm li cas los xij, raws li cov pedals, hauv qab brackets thiab cranks, piv txwv li, yuav tsum tau nruj dua qhov tseem ceeb. Nov yog qee qhov kev xaiv ua ntej koj yuav xav saib…
Clockwise ntawm sab laug:
Ritchey torque key teeb, £20, paliga.cc
Bontrager torque wrench, £ 15.99, bontrager.com Park Tool preset torque driver, £39.99, madison.co.uk
Specialized torque wrench, £75 (pob peb), tshwj xeeb.com
Topeak Nano TorqBar DX, £54.99, extrauk.co.uk
FWE mini torque wrench, £39.99, evanscycles.com
