Kaji ai, screws ni gaw jak rung, gawgap ai lam, shani shagu na sak hkrung lam hta ra kadawn ai n-gun rawng ai ni rai nga ai. Masa n bung ai ni hta lang ai screw ni gaw, arung arai, hkrang masa, n-gun atsam, bungli ni hta grai shai hkat ai lam ni hpe madun dan nga ai. Ndai n bung ai lam ni hpe chye na ai gaw, shim lum ai hte ngang grin ai matut mahkai lam hpe lu la na matu, hkrak ai screw ni hpe grau hkrak hkra lata la lu na re.
1. Material hta shai hkat ai lam ni
Screw langai a arai gaw shi a n-gun n-gun, n-gun atsam, jai lang mai ai makau grup yin hpe hkrak hkra machyi shangun ai. Grau nna lang ai screw arung arai ni gaw:
Carbon steel screws: Ndai ni gaw manu n dan ai hte n-gun ja ai, raitim, shanhte gaw n-gun n rawng ai hte n-gun n rawng ai (ga shadawn, electrogalvanized screws hte hot{2}}dip galvanized screws) ra ai. Dai ni gaw nta kata na nta kata na hka lim ai makau grup yin ni a matu htuk manu ai.
Stainless steel screws: Shanhte gaw n-gun n-gun n-gun grai law ai hpe jaw ya nna, hka lim ai (sh) chemical n-gun rawng ai makau grup yin (ga shadawn, shat gawk ni hte tsi mawan ni) hta lang na matu htuk manu ai. Masha law malawng lang ai amyu myu hta 304 (general corrosion hpe ninghkap lu ai) hte 316 ( panglai hte acid hpe n-gun ja ai) ni lawm ai.
Alloy steel screws: Ndai ni gaw katsi ai hpe tsi lajang ai hku nna n-gun grau law hkra lu la ai (temnching hte tempering zawn re ai) hte, grau tsaw ai-load application ni hta lang ai, mawdaw hte jak zawn re ai, tsang 8.8 hte tsang 12.9 tsaw ai{3}} n-gun rawng ai screws ni hta lang ai.
Copper/aluminum screws: Shanhte gaw wan n-gun kaja ai hte electrochemical n-gun hpe ninghkap lu ai atsam hpe jaw ya ai majaw, wan jak (sh) n-gun n law ai hku jai lang ra ai, raitim, n-gun yawm ai hpe jaw ya ai.
II. Baw Shape hte Drive Method lapran shai hkat ai lam
Screw a bawnu hkrang hte drive ladat gaw install galaw ai arung arai hte application hpe dawdan ya ai:
Baw Shape:
Flat- baw screws: Baw gaw matut da ai daw a ntsa hte n-gun rawng ai majaw, n-gun n rawng ai hku hkrang shapraw ra ai application ni a matu htuk manu ai ( panel mounting zawn re ai).
Countersunk baw screws: Baw hpe bungli galaw ai shara de n-gun dat nna, n-gun ja ai (machine tool arung arai ni zawn re ai) ra ai assembly hta lang chye ai.
Hexagon baw screws: N-gun ja na matu wrench hpe ra sharawng ai, torque tsaw ai, n-gun ja ai-duty ni a matu htuk manu ai.
Round head screws: Nta kata na arung arai ni hte plastic daw ni hta law law lang mu lu ai, shanhte gaw n-gun n rawng ai sha shim lum ai.
Drive Type:
Phillips (PH): Lata hte screwdriver bungli galaw na matu grai htuk manu ai, grai htuk manu ai.
Slotted: Simple raitim, htum mat chye ai, loi loi hte Phillips ni galai shai mat chye ai.
Hex Socket: Allen wrench langai mi ra ai, kaja dik ai anti{0}} hpaw ai atsam ni hpe jaw ya ai, jak rung kata hta mung lang chye ai.
Torx: Anti{0}slip hkrang hpe, shi hkrai shi hpawng de na matu htuk manu ai.
III. Thread Types ni hta shai hkat ai lam ni
Dai thread gaw screw langai a core functional daw rai nna, n bung ai thread amyu ni gaw n bung ai arung arai ni hte jai lang ai lam ni a matu htuk manu ai:
Carse Thread: N-gun kaba, mawdaw gau na matu loi ai, n-gun kaba, hpun, plastic, shing nrai, general metal (hpun screw zawn re ai) ni a matu htuk manu ai.
Fine Thread: N-gun kaji ai, grau kaja ai self{0}}locking atsam ni, n-gun n rawng ai- ni a matu htuk manu ai arung arai ni (sh) n-gun n rawng ai makau grup yin ni (n-gun n law ai n-gang ni hpe matut mahkai ai zawn re ai) ni a matu htuk manu ai.
Tinang hkum hpe-}tapping Screws: Pre{1}}}drilling n ra ai, n-gun ja ai shingnip ni hpe n-gun n rawng ai arung arai ni (plastic hte aluminum plate zawn re ai).
Drywall screws: Ndai ni hta n-gun n rawng hkra, drywall a matu laksan galaw da ai, n-gun n rawng ai shingnip ni nga ai.
IV. N-gun atsam n bung ai lam ni
Screw langai a n-gun madang hpe nambat masat masa hku nna madun da ai (ga shadawn, 4.8, 8.8, 12.9). Shawng nnan na nambat gaw tensile n-gun 1/100 hpe madi madun ai, lahkawng ngu na nambat gaw yield n-gun hte tensile n-gun a ratio hta na htam 10 daram hpe madi madun ai. Ga shadawn:
Grade 4.8: Ordinary carbon steel screw, n law ai{1}}load application ni a matu htuk manu ai.
Grade 8.8: Medium- kaw na, jak rung ni hta grai lang ai n-gun atsam hpe n-gun jaw ai.
Grade 12.9: Mawdaw engine zawn re ai ahkyak ai shara ni hta jai lang ai Ultra-high n-gun ja ai.
V. Laksan{1}}Screws
Screw ni mung ra kadawn ai lam ni a matu lawu na amyu bawsang ni hta pru wa ai:
Expansion Screws: Ndai ni hpe concrete (sh) lung seng bunghku ni hta jat wa ai hka htung ni hku nna jung da nna, n-gun kaba ai n-gun hpe jaw ya ai.
Screws (Set Screws): Ndai screw ni gaw nut n nga ai sha, shaft (sh) shara jahkrat na matu hka htung langai a kata bunghku hpe n-gun n rawng hkra tawn da ai.
Anti-}theft screws: Specialized bawnu (inner triangle zawn re ai) hta, n-gun n rawng ai lam hpe yeng seng kau na matu hte pat shingdang na matu laksan ladat ni ra nga ai.
Daw dan lam
Screws ni gaw arung arai, hkrang masa, shingnip, yaw shada lam ni hta shai hkat ai. Teng man ai screw hpe lata ai gaw, hpawng chyawm ai lam hpe grau kaja hkra galaw ya ai sha n-ga, n-gun n law ai majaw hkrat sum ai lam hpe mung pat shingdang ya ai. Nta hpe gram lajang ai lam (sh) hpaga lam galaw ai lam ni a matu rai tim, ndai shai hkat ai lam ni hpe chye na na matu gaw kam mai ai matut mahkai lam ni hpe hkam la lu na matu ahkyak ai lahkam langai rai nga ai.
