{"id":1886,"date":"2026-04-09T03:17:47","date_gmt":"2026-04-09T03:17:47","guid":{"rendered":"https:\/\/wormwheelgear.top\/?p=1886"},"modified":"2026-04-09T03:18:52","modified_gmt":"2026-04-09T03:18:52","slug":"worm-gear-material-selection-is-a-pairing-decision-not-a-component-decision","status":"publish","type":"post","link":"https:\/\/wormwheelgear.top\/sv\/worm-gear-material-selection-is-a-pairing-decision-not-a-component-decision\/","title":{"rendered":"Worm Gear Material Selection Is a Pairing Decision, Not a Component Decision"},"content":{"rendered":"
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Kunskapsserien \u00b7 Grunderna i sn\u00e4ckv\u00e4xeln<\/p>\n

Sn\u00e4ckv\u00e4xel Materialval<\/span> \u00c4r ett parningsbeslut, inte ett komponentbeslut<\/h1>\n

N\u00e4tet \u00e4r ett tribologiskt system \u2013 axelns h\u00e5rdhet, hjullegering och ytbeskaffenhet samverkar f\u00f6r att producera antingen en kontrollerad ink\u00f6rningsprocess eller en katastrofal n\u00f6tningsh\u00e4ndelse. Att specificera axelmaterialet och hjulmaterialet separat \u00e4r den vanligaste orsaken till f\u00f6rtida sn\u00e4ckhjulsfel.<\/p>\n

\u2699 Korea Ever-Power Worm Gear Co., Ltd\ud83d\udccd Ansan-si, Gyeonggi-do, Korea\ud83d\udce7 sales@wormwheelgear.top<\/div>\n<\/div>\n<\/section>\n
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Ink\u00f6rningsprocessen: Varf\u00f6r materialkemin vid kontaktytan avg\u00f6r kugghjulets livsl\u00e4ngd<\/h2>\n

N\u00e4r en ny sn\u00e4ckv\u00e4xel monteras och startas \u00e4r kuggflankytorna inte perfekt anpassade. \u00c4ven med exakt tillverkning \u00e4r mikroskavheterna p\u00e5 b\u00e5da ytorna st\u00f6rre \u00e4n oljefilmens tjocklek vid start. Dessa skavheter m\u00f6ts och deformeras plastiskt \u2013 en process som kallas ink\u00f6rning \u2013 tills kontaktgeometrin \u00e4r tillr\u00e4ckligt j\u00e4mn f\u00f6r hydrodynamisk sm\u00f6rjning f\u00f6r att separera ytorna helt.<\/p>\n

Huruvida ink\u00f6rningen fortskrider korrekt eller urartar till slitage beror helt p\u00e5 materialparningen vid kontakten. Vid korrekt parning kallbearbetar det mjukare hjulmaterialet och anpassar sig till den h\u00e5rdare axelg\u00e4ngan, vilket skapar en j\u00e4mn, deformationsh\u00e4rdad kontaktzon. Vid felaktig parning \u2013 fel h\u00e5rdhetsskillnad, fel hjullegeringskemi, otillr\u00e4cklig axelh\u00e5rdhet \u2013 genererar de oj\u00e4mna kontakterna lokala blixttemperaturer som \u00f6verstiger vidh\u00e4ftningsgr\u00e4nsen. Metall \u00f6verf\u00f6rs fr\u00e5n en yta till den andra. Den \u00f6verf\u00f6rda metallen skapar slipande partiklar. Drevet f\u00f6rs\u00e4mras p\u00e5 n\u00e5gra veckor.<\/p>\n

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Varf\u00f6r det \u00e4r ett parningsbeslut:<\/strong> Axelmaterialet avg\u00f6r h\u00e5rdheten som hjulmaterialet m\u00e5ste uppfylla. Hjulmaterialet avg\u00f6r de slitageskyddande egenskaper som axelns ytbeskaffenhet m\u00e5ste uppr\u00e4tth\u00e5lla. Att f\u00e5 den ena r\u00e4tt och den andra fel ger samma fell\u00e4ge som att f\u00e5 b\u00e5da fel.<\/p>\n<\/div>\n

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\"Worm<\/p>\n

Glidkontakten mellan sn\u00e4ckg\u00e4ngans flank och hjulets kuggyta arbetar med h\u00f6g glidhastighet (0,5\u201315 m\/s) med en stor h\u00e5rdhetsskillnad \u2013 ett tribologiskt system som kr\u00e4ver korrekt materialparning.<\/p>\n<\/div>\n

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Materialval f\u00f6r maskaxel \u2014 St\u00e5lkvalitetsutvecklingen<\/h2>\n

Materialvalet f\u00f6r maskaxeln \u00e4r en funktion av tre krav: yth\u00e5rdhet f\u00f6r att motst\u00e5 n\u00f6tningsskydd vid n\u00e4tet, k\u00e4rnans seghet f\u00f6r motst\u00e5ndskraft mot st\u00f6tbelastning och utmattning, och h\u00e4rdbarhet \u2013 det djup till vilket h\u00e5rdhet kan uppn\u00e5s genom v\u00e4rmebehandling.<\/p>\n

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\n
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C45<\/span>
\n45\u201355HRC<\/span><\/div>\n
<\/div>\n<\/div>\n
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D1 L\u00e4ttvikts<\/div>\n

C45 st\u00e5l \u2014 45\u201355HRC yth\u00e5rdhet<\/h4>\n

Instegsspecifikationen f\u00f6r l\u00e4tta sn\u00e4ckaxlar. Genomh\u00e4rdad C45 uppn\u00e5r endast en yth\u00e5rdhet p\u00e5 42\u201348 HRC \u2013 otillr\u00e4ckligt f\u00f6r att motverka n\u00f6tning mot tennbrons vid glidhastigheter \u00f6ver 2 m\/s. Induktionsh\u00e4rdning av g\u00e4ngflankerna h\u00f6jer yth\u00e5rdheten till 50\u201355 HRC, vilket \u00e4r det l\u00e4gsta acceptabla f\u00f6r standardsn\u00e4ckv\u00e4xel. Begr\u00e4nsningen med C45 \u00e4r l\u00e5g legeringshalt \u2013 h\u00e4rdbarheten \u00e4r grund. Acceptabel f\u00f6r l\u00e4tta applikationer med l\u00e5g st\u00f6td\u00e4mpning vid m\u00e5ttliga glidhastigheter.<\/p>\n<\/div>\n<\/div>\n

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40Cr<\/span>
\n50\u201356HRC<\/span><\/div>\n
<\/div>\n<\/div>\n
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D1\u2013D2 Medeltung belastning<\/div>\n

40Cr st\u00e5l \u2014 50\u201356HRC yth\u00e5rdhet<\/h4>\n

Standardspecifikationen f\u00f6r legerat st\u00e5l f\u00f6r medeltunga sn\u00e4ckdrev. Kromtillsatsen 1% ger betydligt h\u00f6gre h\u00e4rdbarhet \u00e4n C45 \u2013 en 40Cr-axel som \u00e4r genomh\u00e4rdad till 50\u201356 HRC bibeh\u00e5ller denna h\u00e5rdhet \u00f6ver hela tv\u00e4rsnittet av typiska sn\u00e4ckaxeldiametrar (20\u201380 mm). Detta eliminerar \u00f6verg\u00e5ngsfelet i k\u00e4rnan som p\u00e5verkar C45 induktionsh\u00e4rdade axlar under st\u00f6tbelastning. Standardspecifikationen f\u00f6r Korea Ever-Powers standard sn\u00e4ckdrev i legerat st\u00e5l \u2013 korrekt specifikation f\u00f6r transportbandsdrev, jordbruksmaskiner och industriell automation vid m\u00e5ttliga driftscykler.<\/p>\n<\/div>\n<\/div>\n

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SCM415<\/span>
\n58\u201362 timmars r\u00e4ckvidd<\/span><\/div>\n
<\/div>\n<\/div>\n
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D2\u2013D3 Tung belastning<\/div>\n

SCM415 st\u00e5l \u2014 58\u201362 HRC yth\u00e5rdhet<\/h4>\n

Premiumspecifikationen f\u00f6r kraftiga sn\u00e4ckdrev d\u00e4r st\u00f6tbelastning, kontinuerlig drift med h\u00f6gt vridmoment eller maximal livsl\u00e4ngd kr\u00e4vs. Karbureringsprocessen diffunderar kol i ytskiktet till ett djup av 0,8\u20131,5 mm, vilket skapar en h\u00e5rd martensitisk yta p\u00e5 58\u201362 HRC medan k\u00e4rnan beh\u00e5ller den ursprungliga l\u00e5gkolhaltiga segheten. Den avg\u00f6rande detaljen: g\u00e4ngan \u00e4r slipad efter<\/em> karburering, inte f\u00f6re. Efterslipning s\u00e4kerst\u00e4ller att den slutliga h\u00e5rdheten och geometrin b\u00e5da har specifikationsv\u00e4rdena samtidigt.<\/p>\n<\/div>\n<\/div>\n

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42CrMo<\/span>
\n54\u201358HRC<\/span><\/div>\n
<\/div>\n<\/div>\n
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D3 Extra kraftig \u2014 Stor sektion<\/div>\n

42CrMo-st\u00e5l \u2014 54\u201358HRC yth\u00e5rdhet<\/h4>\n

F\u00f6r sn\u00e4ckaxlar med stor sektion och h\u00f6gt vridmoment (vanligtvis modul M8 och h\u00f6gre) d\u00e4r uppkolningsdjupet blir opraktiskt i f\u00f6rh\u00e5llande till sektionsstorleken. Genomh\u00e4rdad 42CrMo vid 54\u201358 HRC ger en j\u00e4mnare h\u00e5rdhet genom hela kuggsektionen \u00e4n ett uppkolat h\u00f6lje p\u00e5 ett stort substrat. Dragh\u00e5llfasthet vid denna h\u00e5rdhet: cirka 1 700\u20131 900 MPa. Korrekt f\u00f6r applikationer med h\u00f6gt vridmoment vid stor modul.<\/p>\n<\/div>\n<\/div>\n

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SS316<\/span>
\n28\u201334 timmars r\u00e4ckvidd<\/span><\/div>\n<\/div>\n
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S\u00e4rskilda milj\u00f6er \u2014 Livsmedel \/ Marin<\/div>\n

SS316 st\u00e5l \u2014 28\u201334HRC yth\u00e5rdhet<\/h4>\n

Materialet som m\u00e5ste specificeras n\u00e4r korrosionsbest\u00e4ndighet, livsmedelss\u00e4kerhet eller marin atmosf\u00e4r \u00e4r den prim\u00e4ra begr\u00e4nsningen. Yth\u00e5rdheten p\u00e5 28\u201334 HRC \u00e4r betydligt l\u00e4gre \u00e4n f\u00f6r n\u00e5gon av ovanst\u00e5ende legeringsst\u00e5lkvaliteter. Denna l\u00e4gre h\u00e5rdhet inneb\u00e4r l\u00e4gre ytutmattningsbest\u00e4ndighet och l\u00e4gre slitstyrka per glidhastighetsenhet. Kompensera genom att: h\u00e5lla glidhastigheten under 4 m\/s; anv\u00e4nda NSF H1 PAO-sm\u00f6rjmedel; och bekr\u00e4fta att det konstruktionsm\u00e4ssiga vridmomentet ligger inom den reducerade kapaciteten f\u00f6r SS316-upps\u00e4ttningen snarare \u00e4n att anta samma kapacitet som f\u00f6r en motsvarande legeringsst\u00e5lupps\u00e4ttning.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Sn\u00e4ckhjulsmaterial \u2014 Sex legeringar och deras till\u00e4mpningsomr\u00e5de<\/h2>\n

Sn\u00e4ckhjulet \u00e4r den slitande komponenten i en korrekt specificerad sn\u00e4ckv\u00e4xel. Axeln \u00e4r konstruerad f\u00f6r att vara betydligt h\u00e5rdare, s\u00e5 hjulet slits f\u00f6retr\u00e4desvis \u2013 och anpassar sig gradvis till axelns g\u00e4nggeometri under ink\u00f6rningsperioden. Hjulet \u00e4r i sj\u00e4lva verket en tribologisk offerkomponent vars slitagehastighet och slitagemekanism m\u00e5ste kontrolleras genom materialval.<\/p>\n

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ZCuSn10Pb1<\/div>\n
Tennbrons<\/div>\n
Dragh\u00e5llfasthet<\/span>~220 MPa<\/span><\/div>\n
H\u00e5rdhet<\/span>65\u201390 HB<\/span><\/div>\n
Anti-slitstyrka<\/span>\u2605\u2605\u2605\u2605\u2605<\/span><\/div>\n
Styrka<\/span>\u2605\u2605\u2606\u2606\u2606<\/span><\/div>\n
Ans\u00f6kan<\/span>L\u00e4tt\u2013medelstor belastning, standard<\/span><\/div>\n<\/div>\n
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ZCuAl10Fe3<\/div>\n
Al-j\u00e4rnbrons<\/div>\n
Dragh\u00e5llfasthet<\/span>~550 MPa<\/span><\/div>\n
H\u00e5rdhet<\/span>140\u2013180 HB<\/span><\/div>\n
Anti-slitstyrka<\/span>\u2605\u2605\u2605\u2606\u2606<\/span><\/div>\n
Styrka<\/span>\u2605\u2605\u2605\u2605\u2605<\/span><\/div>\n
Ans\u00f6kan<\/span>Tunga belastningar, st\u00f6td\u00e4mpande belastningar<\/span><\/div>\n<\/div>\n
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ZCuZn38Mn2Pb2<\/div>\n
Manganm\u00e4ssing<\/div>\n
Dragh\u00e5llfasthet<\/span>~380 MPa<\/span><\/div>\n
H\u00e5rdhet<\/span>80\u2013110 HB<\/span><\/div>\n
Anti-slitstyrka<\/span>\u2605\u2605\u2605\u2606\u2606<\/span><\/div>\n
Styrka<\/span>\u2605\u2605\u2605\u2606\u2606<\/span><\/div>\n
Ans\u00f6kan<\/span>Kostnadsk\u00e4nslig OEM, medeltung<\/span><\/div>\n<\/div>\n
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SS316<\/div>\n
Rostfritt st\u00e5l<\/div>\n
Dragh\u00e5llfasthet<\/span>~520 MPa<\/span><\/div>\n
H\u00e5rdhet<\/span>28\u201334 HRC<\/span><\/div>\n
Anti-slitstyrka<\/span>\u2605\u2605\u2606\u2606\u2606<\/span><\/div>\n
Styrka<\/span>\u2605\u2605\u2605\u2605\u2605<\/span><\/div>\n
Ans\u00f6kan<\/span>Livsmedelszon 1, endast direktkontakt<\/span><\/div>\n<\/div>\n
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PA66 Nylon<\/div>\n
Polyamid 66<\/div>\n
Dragh\u00e5llfasthet<\/span>~75 MPa<\/span><\/div>\n
H\u00e5rdhet<\/span>120 kr<\/span><\/div>\n
Anti-slitstyrka<\/span>\u2605\u2605\u2605\u2605\u2606<\/span><\/div>\n
Styrka<\/span>Ej till\u00e4mpligt<\/span><\/div>\n
Ans\u00f6kan<\/span>L\u00e4tt, tystg\u00e5ende, torrsm\u00f6rjning<\/span><\/div>\n<\/div>\n
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POM (acetal)<\/div>\n
Polyoximetylen<\/div>\n
Dragh\u00e5llfasthet<\/span>~65 MPa<\/span><\/div>\n
H\u00e5rdhet<\/span>120 kr<\/span><\/div>\n
Anti-slitstyrka<\/span>\u2605\u2605\u2605\u2605\u2606<\/span><\/div>\n
Styrka<\/span>Ej till\u00e4mpligt<\/span><\/div>\n
Ans\u00f6kan<\/span>Instrumentdrivningar, mycket l\u00e4tta<\/span><\/div>\n<\/div>\n<\/div>\n
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\u2699<\/div>\n

Den kritiska parningsregeln<\/h3>\n

F\u00f6r att ink\u00f6rningsmekanismen ska fungera korrekt m\u00e5ste det finnas en viss h\u00e5rdhetsskillnad mellan sn\u00e4ckaxelns yta och sn\u00e4ckhjulets material. Otillr\u00e4cklig skillnad g\u00f6r att b\u00e5da ytorna n\u00f6ter mot varandra snarare \u00e4n att den mjukare ytan anpassar sig till den h\u00e5rdare.<\/p>\n

\u2699 Regel 1:<\/span> Mot ZCuSn10Pb1 (65\u201390 HB \u2248 7\u20139 HRC) \u2014 Sn\u00e4ckans axel m\u00e5ste vara \u2265 45 HRC. Detta m\u00f6jligg\u00f6r induktionsh\u00e4rdning med C45 (50\u201355 HRC) som minimum.<\/span><\/div>\n
\u2699 Regel 2:<\/span> Mot ZCuAl10Fe3 (140\u2013180 HB \u2248 14\u201318 HRC) \u2014 Sn\u00e4ckans axel m\u00e5ste vara \u2265 55 HRC. Kr\u00e4ver 40Cr genomh\u00e4rdad (50\u201356 HRC) eller helst SCM415 karburerad (58\u201362 HRC).<\/span><\/div>\n
\u2699 Regel 3:<\/span> Mot SS316-hjul (28\u201334 HRC) \u2014 SS316-axel \u00e4r den enda korrekta parningen. Kolst\u00e5l mot SS316-hjul skapar ett galvaniskt par i v\u00e5ta\/livsmedels-\/marina milj\u00f6er.<\/span><\/div>\n
\u2699 Regel 4:<\/span> Mot nylon\/POM-skiva \u2014 Axelh\u00e5rdhet \u00e4r inte den styrande faktorn \u2014 ytfinishen \u00e4r det. Axeln m\u00e5ste slipas till Ra \u2264 0,8 \u00b5m. Genomh\u00e4rdad f\u00f6r att f\u00f6rhindra slitage av abrasivt plastavfall.<\/span><\/div>\n

Att bryta mot regel 2 \u00e4r det vanligaste felet i materialspecifikationen:<\/strong> Att specificera C45 eller 40Cr mot aluminium-j\u00e4rnbrons \u00e4r otillr\u00e4ckligt \u2013 tandh\u00e5rdheten i al-j\u00e4rnbrons n\u00e4rmar sig axelytans h\u00e5rdhet, b\u00e5da ytorna n\u00f6ts samtidigt, vilket ger upphov till snabb dimensionsf\u00f6r\u00e4ndring och katastrofal ljudupptrappning utan den gradvisa varning som korrekt parningsslitage ger.<\/p>\n<\/div>\n

Matris f\u00f6r val av materialparning<\/h2>\n
\n\n\n\n\n\n\n\n\n\n
Axel \u2192 Hjul \u2193<\/th>\nC45 induktion
\n50\u201355 HRC<\/th>\n		40Cr genom
\n50\u201356 HRC<\/th>\n		SCM415 f\u00f6rgasare.
\n58\u201362 HRC<\/th>\n		42CrMo genomg\u00e5ende
\n54\u201358 HRC<\/th>\n		SS316
\n28\u201334 HRC<\/th>\n<\/tr>\n<\/thead>\n
ZCuSn10Pb1 Tennbrons<\/td>\n\n
\u2713 Acceptabel<\/div>\n
Endast l\u00e4ttare arbete<\/div>\n<\/td>\n
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\u2713\u2713 B\u00e4st<\/div>\n
Standardtull<\/div>\n<\/td>\n
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\u2713\u2713 Utm\u00e4rkt<\/div>\n
Tung belastning<\/div>\n<\/td>\n
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\u2713\u2713 Utm\u00e4rkt<\/div>\n
Stor modul<\/div>\n<\/td>\n
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\u2717 Ej f\u00f6r korrektiv milj\u00f6.<\/div>\n<\/td>\n<\/tr>\n
ZCuAl10Fe3 Al-J\u00e4rnbrons<\/td>\n\n
\u2717 Otillr\u00e4cklig<\/div>\n
h\u00e5rdhetsskillnad<\/div>\n<\/td>\n
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\u26a0 Marginell<\/div>\n
Undvik st\u00f6tbelastningar<\/div>\n<\/td>\n
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\u2713\u2713 Korrekt<\/div>\n
St\u00f6tplikt<\/div>\n<\/td>\n
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\u2713\u2713 Korrekt<\/div>\n
Tung sektion<\/div>\n<\/td>\n
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Ej till\u00e4mpligt<\/div>\n<\/td>\n<\/tr>\n
ZCuZn38Mn2Pb2 Mn-m\u00e4ssing<\/td>\n\n
\u2713 L\u00e4ttviktsarbete<\/div>\n<\/td>\n
\n
\u2713\u2713 Medeltung belastning<\/div>\n<\/td>\n
\n
\u2713\u2713 Kraftig<\/div>\n<\/td>\n
\n
\u2713 Kraftig<\/div>\n<\/td>\n
\n
\u2717 Inte f\u00f6r korr.<\/div>\n<\/td>\n<\/tr>\n
SS316 rostfritt st\u00e5l<\/td>\n\n
\u2717 Galvanisk korr.<\/div>\n<\/td>\n
\n
\u2717 Galvanisk korr.<\/div>\n<\/td>\n
\n
\u2717 Galvanisk korr.<\/div>\n<\/td>\n
\n
\u2717 Galvanisk korr.<\/div>\n<\/td>\n
\n
\u2713\u2713 Livsmedel\/Marin Z1<\/div>\n<\/td>\n<\/tr>\n
PA66 \/ POM-plast<\/td>\n\n
\u2713 Ljus<\/div>\n
Polera axeln f\u00f6rst<\/div>\n<\/td>\n
\n
\u2713 L\u00e4ttviktsarbete<\/div>\n<\/td>\n
\n
\u00d6verdrivet<\/div>\n<\/td>\n
\n
\u00d6verdrivet<\/div>\n<\/td>\n
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\u2713 L\u00e5gt ljudtorr<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

A Practical Decision Path for New Applications<\/h2>\n
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1. Is the operating environment food production (HACCP), marine, or corrosive wash-down?<\/div>\n
\n
YES \u2192 SS316 shaft + SS316 wheel (Z1) or SS316 shaft + tin bronze wheel (Z2)<\/div>\n
NO \u2192 proceed to question 2<\/div>\n<\/div>\n<\/div>\n
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2. Does the application have significant shock loading (DOL motor start under full load, intermittent impact from process)?<\/div>\n
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YES \u2192 SCM415 carburized shaft + ZCuAl10Fe3 al-iron bronze wheel<\/div>\n
NO \u2192 proceed to question 3<\/div>\n<\/div>\n<\/div>\n
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3. Is continuous torque above 300 Nm or duty cycle above 70%?<\/div>\n
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YES \u2192 40Cr through-hardened shaft + ZCuSn10Pb1 tin bronze wheel (D2)<\/div>\n
NO \u2192 C45 induction shaft + ZCuSn10Pb1 tin bronze wheel acceptable (D1)<\/div>\n<\/div>\n<\/div>\n
\u2192 Confirm hardness differential meets the pairing rules above. Provide application details to Korea Ever-Power for material confirmation before ordering.<\/div>\n<\/div>\n<\/div>\n
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Korea Ever-Power-produkter<\/span><\/p>\n

Worm Gear Products by Material Specification<\/h2>\n<\/div>\n
\n
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\"Sn\u00e4ckv\u00e4xel<\/div>\n
\n
Standard Pairing \u00b7 D1\u2013D2<\/div>\n
Sn\u00e4ckv\u00e4xel och sn\u00e4ckhjulssats i legerat st\u00e5l<\/div>\n
The 40Cr through-hardened worm shaft paired with ZCuSn10Pb1 tin bronze wheel is the standard medium-duty specification \u2014 the correct pairing for the majority of industrial drive applications. The 40Cr shaft achieves 50\u201356 HRC through-hardened, providing adequate hardness differential against tin bronze (65\u201390 HB) for reliable running-in and long service life. The tin bronze wheel’s lead phase provides boundary lubrication protection during start-up and intermittent operation. For D3 heavy-duty applications, the same product is available with SCM415 carburized shaft (58\u201362 HRC) and ZCuAl10Fe3 aluminum-iron bronze wheel \u2014 specify the required duty class at order placement. Material certificates for both shaft and wheel included with every matched set.<\/div>\n
\n
Axel<\/span>40Cr \u00b7 50\u201356 HRC through-hardened<\/span><\/div>\n
Hjul<\/span>ZCuSn10Pb1 \u00b7 65\u201390 HB<\/span><\/div>\n
Modul<\/span>M1\u2013M10<\/span><\/div>\n
Hardness differential<\/span>Confirmed at order placement<\/span><\/div>\n<\/div>\n

Visa produkt \u2192<\/a><\/p>\n<\/div>\n<\/div>\n

\n
\"Brass<\/div>\n
\n
Manganese Brass \u00b7 Cost Effective<\/div>\n
Brass Worm and Worm Wheel Set<\/div>\n
ZCuZn38Mn2Pb2 manganese brass wheel paired with 40Cr through-hardened or C45 induction-hardened worm shaft. The brass wheel offers a middle ground between tin bronze (best anti-scuffing, lower strength) and aluminum-iron bronze (highest strength, lower anti-scuffing): tensile strength of approximately 380 MPa vs 220 MPa for tin bronze, with better anti-scuffing than al-iron bronze. Widely used in OEM applications where cost targets prevent specification of the more expensive tin bronze, and where the duty is light-to-medium with predictable loading rather than shock or impact. The manganese content (1.5\u20132.5%) provides some hardening relative to plain brass, extending tooth wear life.<\/div>\n
\n
Hjul i legering<\/span>ZCuZn38Mn2Pb2 (~380 MPa)<\/span><\/div>\n
Axel<\/span>C45 induction or 40Cr through<\/span><\/div>\n
Ans\u00f6kan<\/span>Light\u2013medium duty OEM<\/span><\/div>\n
Mat. certificate<\/span>Included as standard<\/span><\/div>\n<\/div>\n

Visa produkt \u2192<\/a><\/p>\n<\/div>\n<\/div>\n

\n
\"Plastic<\/div>\n
\n
PA66 \/ POM Wheel \u00b7 Light Duty<\/div>\n
Plastic Worm Gear Set<\/div>\n
PA66 nylon or POM acetal wheel paired with hardened steel shaft for light-duty, low-noise applications. The self-lubricating plastic wheel eliminates the need for oil bath lubrication \u2014 critical for applications in confined spaces or clean environments. The steel shaft must be ground to Ra \u2264 0.8 \u00b5m \u2014 a rougher shaft surface abrades the plastic wheel rapidly rather than running in smoothly. Korea Ever-Power plastic gear sets include a ground, polished shaft as standard. PA66 absorbs limited moisture from the environment; POM is preferred where dimensional stability under humidity variation is important. No lubrication required \u2014 specify grease only if operating temperature exceeds 80\u00b0C.<\/div>\n
\n
Hjulmaterial<\/span>PA66 \/ POM (specify at order)<\/span><\/div>\n
Shaft finish<\/span>Ground Ra \u2264 0.8 \u00b5m (standard)<\/span><\/div>\n
Sm\u00f6rjning<\/span>Dry or light grease<\/span><\/div>\n
Modul<\/span>M0.5\u2013M4 (light duty range)<\/span><\/div>\n<\/div>\n

Visa produkt \u2192<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

\n
\n

Material Selection FAQ<\/span><\/p>\n

Worm Gear Material Questions from Engineers and Buyers<\/h2>\n<\/div>\n
\nWhy is my worm wheel wearing rapidly after only three months in service? The material looks correct on paper.+<\/span><\/summary>\n
\n

Rapid wear in a correctly-specified-on-paper installation usually points to one of three problems. First, hardness differential violation: verify shaft hardness with a portable Rockwell tester rather than relying on the material certificate alone. A shaft shipped as 40Cr but not properly heat-treated may be 35\u201342 HRC rather than 50\u201356 HRC, which puts it at or below the minimum for adequate differential against tin bronze. Second, lubricant issue: EP-additive gear oil attacking the bronze wheel. Third, contamination: abrasive particles in the lubricant \u2014 even if you identify and remove the source, the abrasive particles already in the oil continue to abrade until the oil is changed.<\/p>\n<\/div>\n<\/details>\n

\nCan I upgrade from a tin bronze wheel to aluminum-iron bronze to get longer wear life without changing the worm shaft?+<\/span><\/summary>\n
\n

This is the pairing mistake described in the hardness differential rule. If your worm shaft is C45 induction-hardened (50\u201355 HRC) or 40Cr through-hardened (50\u201356 HRC), you cannot simply substitute ZCuAl10Fe3 without verifying shaft hardness is adequate. At 40Cr against ZCuAl10Fe3, the hardness differential is sufficient. At C45 against ZCuAl10Fe3, the margin is tighter and should be verified with a scuffing risk calculation at your operating sliding velocity. If your shaft is C45 and you want aluminum-iron bronze wheel, upgrade to SCM415 carburized shaft at the same time \u2014 the shaft needs the higher hardness to work correctly with the harder wheel alloy.<\/p>\n<\/div>\n<\/details>\n

\nWhat is the difference between ZCuSn10Pb1 and ZCuSn12 tin bronze for worm wheels? When should I specify the higher-tin grade?+<\/span><\/summary>\n
\n

ZCuSn12 has approximately 20% higher tin content than ZCuSn10Pb1, providing slightly higher tensile strength (~250 MPa vs ~220 MPa) and higher hardness (~90\u2013110 HB vs ~65\u201390 HB). The anti-scuffing performance from the lead phase is similar between the two grades. ZCuSn12 is worth specifying when you need more capacity than ZCuSn10Pb1 can provide at the same module, but the application does not have the shock loading that would justify switching to ZCuAl10Fe3.<\/p>\n<\/div>\n<\/details>\n

\nI have a worm gear in a humid coastal environment but it does not need to be food grade. Should I still specify SS316?+<\/span><\/summary>\n
\n

For the worm shaft, yes \u2014 if the housing is not fully sealed and the shaft is exposed to the coastal atmosphere, SS316 is the correct specification. A zinc-plated carbon steel shaft will begin pitting within 12\u201318 months in a marine atmosphere, and an SS304 shaft within 6\u201324 months due to chloride-induced pitting. For the worm wheel, if the wheel is inside a sealed housing, ZCuSn10Pb1 tin bronze remains acceptable \u2014 bronze resists marine atmospheric corrosion well. If directly exposed to salt spray, ZCuAl10Fe3 aluminum-iron bronze is more resistant to the marine biofouling and intergranular corrosion that develops in tin bronze under repeated wet-dry cycling.<\/p>\n<\/div>\n<\/details>\n

\nWhy do I need a material certificate for the worm shaft specifically? Can I not trust that a 40Cr shaft is actually 40Cr?+<\/span><\/summary>\n
\n

Material substitution in the supply chain is more common than engineers expect, particularly for shafts purchased through intermediary distributors. A C45 shaft and a 40Cr shaft look identical before heat treatment. A hardness test confirms the achieved hardness but not the alloy \u2014 it is possible to heat-treat C45 to 50 HRC by induction hardening while the datasheet specifies 40Cr through-hardened at 52 HRC. The difference shows up in case depth and fatigue life. A material certificate to mill heat number proves the alloy composition \u2014 not just the hardness outcome.<\/p>\n<\/div>\n<\/details>\n

\nIs there a weight\/cost trade-off between the different wheel materials that I should consider?+<\/span><\/summary>\n
\n

Yes, and it is significant at larger module sizes. Tin bronze ZCuSn10Pb1 is a relatively expensive copper alloy \u2014 at Module M6 and above, the wheel can be a major cost component of the gear set. From lowest to highest cost: POM\/PA66 < manganese brass < ZCuAl10Fe3 < ZCuSn10Pb1 < SS316. Note that material cost is a fraction of total installation cost \u2014 specifying the wrong material and replacing the gear every 6 months costs far more than specifying correctly once.<\/p>\n<\/div>\n<\/details>\n

\nWhat is the service life difference between a correctly specified worm gear set and an incorrectly specified one?+<\/span><\/summary>\n
\n

The service life difference is typically 10:1 or greater. A correctly specified set exhibits gradual, controlled wear of the wheel tooth flanks over thousands of hours, measurable by oil analysis particle count, with sufficient warning before dimensional limits are exceeded. An incorrectly specified set \u2014 wrong hardness differential, wrong lubricant, contamination \u2014 typically fails by scuffing or rapid abrasive wear within 200\u2013500 hours.<\/p>\n<\/div>\n<\/details>\n

\nFor a worm gear set that runs infrequently \u2014 only a few hours per week \u2014 does the material specification still matter as much?+<\/span><\/summary>\n
\n

Infrequent operation makes the boundary lubrication failure mode more likely, not less. Every time the drive restarts from rest, the mesh operates in boundary lubrication \u2014 no hydrodynamic film \u2014 for the first few seconds to minutes until the operating temperature and sliding velocity build the film. A drive that starts and stops frequently experiences proportionally more boundary lubrication relative to its total running time. The tin bronze wheel’s lead-phase boundary lubrication property is particularly valuable in intermittent applications. Never conclude that an infrequently used application can tolerate a lower material specification.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

\n
\n

Get a Material Recommendation for Your Application<\/h2>\n

Provide duty class, operating environment, shock load conditions, continuous torque, and any special requirements (food, marine, documentation). Korea Ever-Power confirms the correct shaft-wheel material pairing with hardness differential calculation before order placement.<\/p>\n

\u2709 Request Material Specification<\/a>
\n\u2699 Browse All Worm Gear Products<\/a><\/div>\n<\/div>\n<\/div>\n

Redakt\u00f6r: Cxm<\/p>","protected":false},"excerpt":{"rendered":"

Knowledge Series \u00b7 Worm Gear Fundamentals Worm Gear Material Selection Is a Pairing Decision, Not a Component Decision The mesh is a tribological system \u2014 shaft hardness, wheel alloy, and surface condition interact to produce either a controlled running-in process or a catastrophic scuffing event. Specifying the shaft material and the wheel material independently is […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[4774],"tags":[1394,1399],"class_list":["post-1886","post","type-post","status-publish","format-standard","hentry","category-worm-gear","tag-worm-gear","tag-worm-gear-worm"],"_links":{"self":[{"href":"https:\/\/wormwheelgear.top\/sv\/wp-json\/wp\/v2\/posts\/1886","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wormwheelgear.top\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wormwheelgear.top\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wormwheelgear.top\/sv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wormwheelgear.top\/sv\/wp-json\/wp\/v2\/comments?post=1886"}],"version-history":[{"count":3,"href":"https:\/\/wormwheelgear.top\/sv\/wp-json\/wp\/v2\/posts\/1886\/revisions"}],"predecessor-version":[{"id":1889,"href":"https:\/\/wormwheelgear.top\/sv\/wp-json\/wp\/v2\/posts\/1886\/revisions\/1889"}],"wp:attachment":[{"href":"https:\/\/wormwheelgear.top\/sv\/wp-json\/wp\/v2\/media?parent=1886"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wormwheelgear.top\/sv\/wp-json\/wp\/v2\/categories?post=1886"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wormwheelgear.top\/sv\/wp-json\/wp\/v2\/tags?post=1886"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}