- English
- Chinese
- French
- German
- Portuguese
- Spanish
- Russian
- Japanese
- Korean
- Arabic
- Irish
- Greek
- Turkish
- Italian
- Danish
- Romanian
- Indonesian
- Czech
- Afrikaans
- Swedish
- Polish
- Basque
- Catalan
- Esperanto
- Hindi
- Lao
- Albanian
- Amharic
- Armenian
- Azerbaijani
- Belarusian
- Bengali
- Bosnian
- Bulgarian
- Cebuano
- Chichewa
- Corsican
- Croatian
- Dutch
- Estonian
- Filipino
- Finnish
- Frisian
- Galician
- Georgian
- Gujarati
- Haitian
- Hausa
- Hawaiian
- Hebrew
- Hmong
- Hungarian
- Icelandic
- Igbo
- Javanese
- Kannada
- Kazakh
- Khmer
- Kurdish
- Kyrgyz
- Latin
- Latvian
- Lithuanian
- Luxembou..
- Macedonian
- Malagasy
- Malay
- Malayalam
- Maltese
- Maori
- Marathi
- Mongolian
- Burmese
- Nepali
- Norwegian
- Pashto
- Persian
- Punjabi
- Serbian
- Sinhala
- Slovak
- Slovenian
- Somali
- Samoan
- Scots Gaelic
- Shona
- Sindhi
- Sundanese
- Swahili
- Tajik
- Tamil
- Telugu
- Thai
- Ukrainian
- Urdu
- Uzbek
- Vietnamese
- Welsh
- Xhosa
- Yiddish
- Yoruba
- Zulu
- Kinyarwanda
- Tatar
- Oriya
- Turkmen
- Uyghur
Dacromet-Coated Socket Head Cap Screws
2026-11-03
1. Selelekela
Socket head cap screws, e tloaelehileng ka hare ISO 4762 / DIN 912 - ke liboutu tsa khetho kae kapa kae moo meroalo e phahameng ea li-clamping, lihlooho tse kopaneng, le taolo e nepahetseng ea torque e kopanang teng. Hobane hangata li etsoa ka lihlopha tsa thepa ea 8.8, 10.9 haholo-holo 12.9, liboutu tsena li sebetsa ka liperesente tse phahameng tsa matla a tsona a tlhahiso, 'me matla ao a etsa hore li hlaselehe habonolo. ho ruruha ha haedrojene, khatello ea maikutlo corrosion cracking, 'me mafome a simoloha karolong ea hlooho le maboteng a sokete ea hex.
Dacromet barbotage - e seng electrolytic zinki-aluminium flake tsamaiso e hlalosoang ke ISO 10683 le ASTM F1136 - e sebetsana hantle le mefokolo ena. Ka filimi e tšesaane ea 8-12 μm e fana ka lihora tse 720 ho isa ho tse 1,000 tsa ho hanyetsa ha letsoai pele. mafome a makgubedu (ASTM B117 NSS), ha e hlahise kotsi ea hydrogen embrittlement nakong ea ts'ebetso, 'me e boloka geometry e nepahetseng ea hex socket le 6g khoele mamello hore socket head cap screws itšetlehile ka.
2. Bolt Geometry le Likarolo tsa Moqapi
Socket head cap screw ke boutu e matla e felletseng e nang le hlooho ea cylindrical le drive socket socket drive:
- Hlooho ea cylindricalle a knurled bokaholimo ba selikalikoe; bophara ba hlooho dk ≈ 1.5 × d - hoo e batlang e le 30-40% e nyane ho feta hexagon head bolt ea boholo bo lekanang, ho lumella mekhoa e kopanetsoeng, e haufi-ufi ea bolt;
- Hlooho-to-shank fillet, sebaka sa phetoho ea mokhathala-o bohlokoa moo khatello ea maikutlo e leng holimo;
- Khoele e felletseng kapa khoele e sa fellang(smooth shank) mekhoa; li-screws tsa khoele tse sa fellang li beha sefofane sa ho kuta ka har'a shank e sa etsoang bakeng sa bokhoni bo phahameng ba ho kuta;
- Lintlha tse fapaneng: boemo ba ntlha bo bataletseng (chamfered); ntlha ya ntjale ntlha ea khoune bakeng sa sebaka le ho notlela mesebetsi.
Ha ho bapisoa le liboutu tsa hex, SHCS e hlahisa holimo lata pele bakeng sa torque e tšoanang ka lebaka la mochini o sebetsang hantle oa socket, 'me li kentsoe ka linotlolo tsa hex, li-wrenches tsa torque, kapa li-driver tsa hex tse tsamaisoang ka matla - li li etsa liboutu tse tloaelehileng lisebelisoa tsa mochini, liforomo tsa ente, li-hydraulic manifolds, li-jigs le li-robotics.
3. Corrosion Performance Papiso
| Ho roala ka sehlopha sa 8.8-12.9 SHCS | Botenya | Ho fafatsa letsoai ho ea ho mafome a khubelu (ASTM B117) | Kotsi ea hydrogen embrittlement | Lintlha |
| Black oxide (e ntšo), e tlotsitsoeng ka oli | <1 μm | <24 h | Ha ho letho | Cosmetic feela; oli e hlatsoa |
| Zinc phosphate + oli | 3–5 μm | ≈ 48-72 h | Ha ho letho | Qetello e tloaelehileng ea "batsho", bophelo bo fokolang |
| Electro-galvanized Zn12, Cr(VI)-mahala | 12 μm | ≈ 192 h | E phahameng (12.9 ha e khothalletsoe) | Sokete le likhoele tse tšesaane |
| Zinc-nickel alloy electro-plate | 8–12 μm | ≈ 480-720 h | E itekanetseng | Litšenyehelo tse phahameng; e hloka ka mor'a ho baka |
| Dacromet DAC 320 (Sehlopha sa 2) | 8mm | ≈ 720 h | Ha e le hantle ha ho letho | Silver gray |
| Dacromet DAC 500 / e ntšo | 10–12 μm | ≈ 1,000 h | Ha e le hantle ha ho letho | Black finish e bapisa letoto le letšo |
6. Maemo le Mefuta e Tloaelehileng ea Lihlahisoa
Melao-motheo ea bohlokoa: ISO 4762 / DIN 912 (li-screws tsa hlooho ea socket), ISO 898-1 (lisebelisoa tsa mochini), ISO 10683:2018 (liaparo tse se nang electrolytic zinc flake), ASTM F1136, ASTM B117, ISO 4042 (electroplating le HE tataiso), DIN 267-28 le GB/T 70.1 / GB/T 5267.3.
| Paramethara | Tloaelehileng Range |
| Diameter | M3 – M42 (No.4 – 1-1/2”) |
| Bolelele | 6 - 300 mm, khoele e felletseng kapa khoele e sa fellang |
| Sehlopha sa thepa | 8.8 / 10.9 / 12.9 |
| Setaele sa hlooho | E tloaelehileng (ISO 4762), hlooho e tlaase (DIN 6912), hlooho e koetsoeng |
| Ntlha | Sebaka se bataletseng / sa ntja / ntlha ea khoune |
| Ho roala | DAC 320 / DAC 400 / DAC 500; silevera e bohlooho kapa e ntšo; Cr(VI)-mahala |
| Ho mamellana le khoele | 6g, likhoele tse koahetsoeng ntle le ho tlanya hape |
7. Likopo le Tataiso ea Khetho
1.Match barbota ho matla: bakeng sa li-bolts tsa sehlopha sa 10.9 le 12,9, tsitlallela ho li-non-electrolytic zinc flake (Dacromet / Geomet) ho felisa ho phunyeha ha hydrogen;
2.Tlosa oxide e ntšo ka bohlale: hlakisa Dacromet e ntšo ha bareki ba batla ponahalo e ntšo e nang le tšireletso ea 'nete ea mafome;
3.Tiisa sehlopha sa ho roalaka lihora tsa NSS (DAC 320 ≈ 720 h; DAC 500 ≈ 1,000 h) 'me u kope tlaleho ea tlhahlobo ea moetsi oa liaparo;
4.Tiisa Cr(VI)-mahala passivation(trivalent chromium) bakeng sa ho latela RoHS / ELV;
5.Check friction data: fumana lintlha tsa linate le tlaleho ea coefficient-of-friction bakeng sa kopano e laoloang ke torque;
6.Qetella tsamaiso: Sebelisa linate tse tlositsoeng, liwashara, le lintho tse kentsoeng ka teipi tsa bokhoni bo lumellanang ho qoba li-fasteners tse ka bang teng.
8. Qetello
Li-screws tsa hlooho ea socket tse koahetsoeng ka Dacromet li kopanya makhabane a mochini oa liboutu tse matla ka ho fetesisa - li-cylindrical heads, compact cylindrical socket drive, bokhoni bo phahameng ba ho jara - ka sistimi ea ho roala e etselitsoeng lintlha tsa bona tse fokolang hantle: ha ho na hydrogen embrittlement holim'a tšepe ea 12.9, sekoaelo ka har'a sokete le libaka tse khubelu tsa marang-rang. botsitso bakeng sa kopano e nepahetseng. Ha li hlalositsoe ka nepo, li fana ka lihora tse 720-1,000 tsa ho fafatsa letsoai ka filimi ea 8-12 μm, 'me li tlisa ponahalo e lefifi, e matte ea liboutu tse ntšo ts'ebeletsong ea 'nete e thibelang ho bola.
