Kína 2019 New Style Hex lengri Wood Skrúfa Framleiðandi & Birgir | Ruiye

2019 New Style Hex Long Wood Skrúfa

Stutt lýsing:

Efni: kolefni úr stáli Q195, Q235 / ryðfrítt stál

Stærð: M6 M8 M10 M12 M16 ...

Lengd: 25mm-160mm ...

Yfirborðsmeðhöndlun: galvaniseruðu


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We're convinced that with joint endeavours, the business between us will bring us mutual benefits. We are able to guarantee you products high quality and competitive value for 2019 New Style Hex Long Wood Skrúfa , við gegna leiðandi hlutverki í húsgögnum viðskiptavinum góða vöru gæði mikilli hendi og árásargjarn gjöldum.
We're convinced that with joint endeavours, the business between us will bring us mutual benefits. We are able to guarantee you products high quality and competitive value for Hex Head Wood Skrúfa ,Long Wood Skrúfa ,Wood Skrúfa , Customer satisfaction is our goal. We've been looking forward to cooperating with you and providing our best services to suit your needs. We warmly welcome you to contact us and you should feel free to contact us. Browse our online showroom to see what we can do for you personally. And then E-mail us your specifications or inquiries today.
Skrúfa:

A skrúfa er tegund af fastener, í sumum hátt svipuð to a bolt, venjulega gerð úr málmi, og einkennist af gormlaga hálsinum, þekktur eins og a  mótskrúfgang  (ytra thread). Skrúfur eru notuð til að festa efni með því að grafa í og wedging inn efni þegar kveikt, en þráður sker rásir á festi efni sem gæti hjálpað draga fest efnum saman og koma í veg fyrir draga út. Það eru margir skrúfur fyrir ýmsum efnum; þeir almennt fest með skrúfum eru tré, málmplötur og plast.

A skrúfa verður yfirleitt að hafa  hausinn  á annan endann sem inniheldur sérstaklega mynduð lögun sem gerir það að vera kveikt eða  ekið með tól. Algengustu verkfæri fyrir akstur skrúfur eru skrúfjárn og wrenches. Höfuðið er yfirleitt stærri en meginmál skrúfa, sem heldur skrúfuna frá því að vera rekinn dýpra en lengd skrúfuna og að veita  burðaryfirborð

Wood skrúfa:

Snemma tré skrúfur voru gerðar af hendi, með röð af skrá, chisels og önnur verkfæri klippa, og þær geta verið Spotted auðveldlega með því að átta sig á óreglulega bil og lögun þræði, auk skrá merki eftir á höfuð skrúfa og á svæðinu milli þræði. Margar af þessum skrúfum hafði barefli enda, alveg skortir verulega tapered punkt á næstum öllum nútíma tré skrúfur. Að lokum, Rennibekkir voru notuð til að framleiða tré skrúfur, með fyrsta einkaleyfi verið skráð 1760 í Englandi. Á 1850s Málmmótun verkfæri voru þróaðar til að veita fleiri samræmda og samkvæmur þráð. Skrúfur gert með þessum verkfærum með ávala dali með beittum og grófum þræði. Sumir tré skrúfur voru gerðar með klippa deyr eins snemma og seint 1700s (jafnvel áður 1678 þegar bókin efnið var fyrst birt í hlutum).

Þegar skrúfa beygja vélar voru í almennri notkun, voru mest auglýsing í boði tré skrúfur framleitt með þessari aðferð. Þessar skera tré skrúfur eru nánast undantekningarlaust lækkað, og jafnvel þegar tapered Shank er ekki augljóst, þeir má sjá af því að þræðirnir nái ekki framhjá þvermál shank. Slík skrúfur eru best sett upp eftir að bora tilraunaverkefni holu með tapered krónu. Meirihluti nútíma tré skrúfur, nema fyrir þá úr kopar, myndast á þráð völsunarvélar. Þessar skrúfur hafa stöðugt þvermál, þræði með stærri þvermál en shank, og eru sterkari vegna þess veltingur aðferð hjartarskinn ekki skera korn af málmi.


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