{"id":1875,"date":"2026-04-09T02:58:48","date_gmt":"2026-04-09T02:58:48","guid":{"rendered":"https:\/\/wormwheelgear.top\/?p=1875"},"modified":"2026-04-09T03:00:14","modified_gmt":"2026-04-09T03:00:14","slug":"stainless-steel-worm-gear-is-not-the-same-as-food-grade","status":"publish","type":"post","link":"https:\/\/wormwheelgear.top\/da\/stainless-steel-worm-gear-is-not-the-same-as-food-grade\/","title":{"rendered":"“Stainless Steel Worm Gear ”\u00a0Is Not the Same as Food Grade"},"content":{"rendered":"
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<\/div>\n
<\/div>\n
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Vejledning til applikationsteknik \u00b7 A5<\/span><\/div>\n
\u2713 HACCP-zone 1 og 2<\/span>
\n\u2713 SS316 Elektropoleret<\/span>
\n\u2713 NSF H1-kompatibel<\/span>
\n\u2713 Fuld dokumentation<\/span><\/div>\n

\"Snekkegear i rustfrit st\u00e5l\"<\/span>\u00a0Er ikke det samme som f\u00f8devarekvalitet<\/h1>\n

Et SS304 snekkegear best\u00e5r en visuel inspektion. Det dumpes i en HACCP Zone 1-revision. Overfladefinishen, sm\u00f8remiddelcertificeringen og dokumentationssporet afg\u00f8r, om din maskine opn\u00e5r lovgivningsm\u00e6ssig godkendelse \u2013 eller om den tages ud to uger efter installationen.<\/p>\n

\u2709 Anmod om f\u00f8devarekvalitetsspecifikation<\/a>
\n\u2699 Gennemse rustfri gear<\/a><\/div>\n
<\/div>\n<\/div>\n<\/section>\n
\n

Hvad HACCP-revisionen rent faktisk fandt ud af<\/h2>\n

I 2022 installerede en koreansk producent af forarbejdet k\u00f8d en ny sk\u00e6re- og portionslinje. Transportb\u00e5ndet og portionsh\u00e5ndteringsdrevene brugte gearkasser, der af maskinbyggeren var specificeret som \"snekkegear i rustfrit st\u00e5l\". Fire m\u00e5neder efter idrifts\u00e6ttelse, under en rutinem\u00e6ssig HACCP-revision foretaget af en tredjepart, blev tre af de tandhjulsdrevne enheder markeret. Ikke for korrosion. Ikke for kontaminering. For overfladeruhed.<\/strong><\/p>\n

Gearkassens udgangsakselt\u00e6tningsomr\u00e5de havde en bearbejdet overfladeruhed p\u00e5 Ra 3,2-6,4 \u00b5m. K\u00f8dforarbejdningsregler i Sydkorea kr\u00e6ver, at overflader i f\u00f8devarekontakt og st\u00e6nkzoner skal have en Ra \u2264 0,8 \u00b5m. Materialet var rustfrit st\u00e5l. Materialet var ikke problemet. Det var finishen. Linjen blev sat i karant\u00e6ne i fire dage, mens gearkasserne blev fjernet, belagt med elektropolerede akselforl\u00e6ngere og recertificeret.<\/p>\n

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Denne vejledning d\u00e6kker:<\/strong> HACCP-zoneklassificering og hvad hver zone kr\u00e6ver af gearkomponenter; den metallurgiske forskel mellem SS304 og SS316 i CIP-milj\u00f8er; hvorfor NSF H1-sm\u00f8remidler skaber et kompatibilitetsproblem med bronzehjul; krav til overfladefinish efter anvendelse; og hvordan man opbygger en dokumentationspakke, der best\u00e5r f\u00f8devaresikkerhedsrevision.<\/p>\n<\/div>\n

HACCP-zoneklassificering \u2014 rammen der definerer alt<\/h2>\n

HACCP-zoneklassificering opdeler et f\u00f8devareproduktionsmilj\u00f8 i omr\u00e5der baseret p\u00e5 risikoen for produktkontakt. Gearkomponenter, der anvendes i eller i n\u00e6rheden af \u200b\u200bhver zone, st\u00e5r over for forskellige lovgivningsm\u00e6ssige og tekniske krav.<\/p>\n

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\n
<\/div>\n
Z1<\/div>\n
Direkte produktkontaktzone<\/div>\n
Gearkomponenter ber\u00f8rer fysisk eller er neds\u00e6nket i f\u00f8devareproduktet. Sj\u00e6ldent for drivgear, men forekommer i dejblanderdrev, k\u00f8dhakkerdrev og noget presseudstyr.<\/div>\n
Kr\u00e6ver: SS316L, Ra \u2264 0,4 \u00b5m, NSF H1-sm\u00f8ring, fuld FDA\/HACCP-dokumentation<\/div>\n<\/div>\n
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<\/div>\n
Z2<\/div>\n
St\u00e6nk- og drypzone<\/div>\n
Produktet kan spr\u00f8jte, dryppe eller l\u00f8be ned p\u00e5 gearkomponenter under normal drift eller under reng\u00f8ring. Den mest almindelige zone for drivgear i f\u00f8devareforarbejdningslinjer.<\/div>\n
Kr\u00e6ver: SS316, Ra \u2264 0,8 \u00b5m, NSF H1 sm\u00f8remiddel, IP65+ t\u00e6tning, dokumenterede materialer<\/div>\n<\/div>\n
\n
<\/div>\n
Z3<\/div>\n
Hygiejnisk omgivelseszone<\/div>\n
Ingen direkte kontakt eller st\u00e6nkkontakt, men inden for f\u00f8devareproduktionsbygningen. Regelm\u00e6ssig afvaskning finder sted. Overfladerne skal kunne reng\u00f8res, men produktkontakt forventes ikke.<\/div>\n
Kr\u00e6ver: SS304 acceptabel, Ra \u2264 1,6 \u00b5m, IP54+ t\u00e6tning, reng\u00f8ringsvenlige overflader<\/div>\n<\/div>\n<\/div>\n
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\"SS316<\/p>\n

Korea Ever-Power SS316 snekkegear med elektropolerede flanker (Ra \u2264 0,4 \u00b5m) \u2014 overholder kravene i f\u00f8devareforarbejdningszone 1 og zone 2.<\/p>\n<\/div>\n

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SS316 vs SS304 vs kulstofst\u00e5l \u2014 Metallurgien bestemmer zonen<\/h2>\n

Standard CIP-reng\u00f8ringsopl\u00f8sninger i k\u00f8d-, mejeri- og drikkevarefaciliteter bruger natriumhydroxid (NaOH) i en koncentration p\u00e5 1-2% ved 70-80 \u00b0C til organisk reng\u00f8ring, efterfulgt af salpetersyre eller pereddikesyre til desinficering. SS304 indeholder 18% krom - dets passive oxidlag er modtageligt for grubet\u00e6ring fra kloridioner over ca. 15 \u00b0C. SS316 tils\u00e6tter 2-3% molybd\u00e6n, hvilket h\u00e6ver den kritiske grubet\u00e6ringstemperatur til ca. 50 \u00b0C - over temperaturomr\u00e5det for CIP-operationer.<\/p>\n

\n
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SS316<\/div>\n
Zone 1 og Zone 2<\/div>\n
Molybd\u00e6n<\/span>2,0\u20133,0%<\/span><\/div>\n
Grubet\u00e6ringstemperatur<\/span>~50\u00b0C start<\/span><\/div>\n
CIP-kompatibel.<\/span>Fuld \u2014 NaOH + HNO3<\/span><\/div>\n
Pereddikesyre<\/span>Kompatibel<\/span><\/div>\n
Biofilmmodstand.<\/span>H\u00f8j (efter Ra \u2264 0,8)<\/span><\/div>\n
\u2713 Korrekt til brug i f\u00f8devareproduktion<\/div>\n<\/div>\n
\n
SS304<\/div>\n
Kun zone 3<\/div>\n
Molybd\u00e6n<\/span>Ingen<\/span><\/div>\n
Grubet\u00e6ringstemperatur<\/span>~15\u00b0C start<\/span><\/div>\n
CIP-kompatibel.<\/span>Marginal \u2014 kloridrisiko<\/span><\/div>\n
Pereddikesyre<\/span>Marginal ved h\u00f8j temperatur<\/span><\/div>\n
Biofilmmodstand.<\/span>Nederste \u2014 huller indeholder bakterier<\/span><\/div>\n
\u26a0 Kun acceptabel for omgivende rene zoner<\/div>\n<\/div>\n
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Kulstof+Zink<\/div>\n
Ikke f\u00f8devaregodkendt<\/div>\n
Beskyttelse<\/span>Offerzinkbel\u00e6gning<\/span><\/div>\n
CIP-kompatibel.<\/span>Ingen \u2014 NaOH-strimler af zink<\/span><\/div>\n
Pereddikesyre<\/span>\u00d8del\u00e6gger bel\u00e6gningen<\/span><\/div>\n
Afvaskning<\/span>D\u00e5rlig<\/span><\/div>\n
HACCP-zone<\/span>Ikke acceptabelt i nogen zone<\/span><\/div>\n
\u2717 Ikke egnet til f\u00f8devaremilj\u00f8er<\/div>\n<\/div>\n<\/div>\n
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Problemet med kompatibiliteten mellem NSF H1-sm\u00f8remiddel og bronzehjul<\/h2>\n
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\"Bronze<\/div>\n
\n

NSF H1-sm\u00f8remidler er formuleret til utilsigtet kontakt med f\u00f8devarer. De er godkendt til brug, hvor sm\u00f8remidlet kan komme i kontakt med f\u00f8devarer i sm\u00e5 m\u00e6ngder \u2013 standardspecifikationen for zone 1- og zone 2-gearkasser.<\/p>\n

Problemet: NSF H1-formuleringer udelukker svovlbaserede og klorbaserede EP (Extreme Pressure)-additiver \u2013 netop de additiver, der giver anti-ridseevne i standard snekkegearolier. Uden EP-additiver har et NSF H1-sm\u00f8remiddel en lavere anti-ridseevne end en konventionel snekkegearolie, is\u00e6r ved h\u00f8je glidehastigheder over 6 m\/s og forh\u00f8jede temperaturer.<\/p>\n

Specifikationsstien, der l\u00f8ser dette: Snekkeakslen skal karbureres og slibes SCM415 ved 58-62 HRC.<\/strong> Nettets anti-ridseevne afh\u00e6nger prim\u00e6rt af h\u00e5rdhedsforskellen. En h\u00e6rdet SCM415-aksel parret med tinbronzehjul og NSF H1 PAO-olie opretholder tilstr\u00e6kkelig anti-ridse i hele det f\u00f8devarerelevante hastighedsomr\u00e5de. Hold glidehastigheden under 4 m\/s for NSF H1-applikationer.<\/p>\n<\/div>\n<\/div>\n

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Brug ikke NSF H2 sm\u00f8remidler<\/strong> hvor der er mulighed for kontakt med f\u00f8devarer. NSF H2 certificerer sm\u00f8remidler kun til brug p\u00e5 overflader, der ikke er i kontakt med f\u00f8devarer. H2-formuleringer kan indeholde EP-tils\u00e6tningsstoffer, der ikke er godkendt til utilsigtet kontakt med f\u00f8devarer. Angiv H1 i alle Zone 1- eller Zone 2-drev, uanset husets t\u00e6tningsniveau.<\/p>\n<\/div>\n

Krav til overfladefinish efter anvendelsesposition<\/h2>\n

Overfladeruhed (Ra) bestemmer, om biofilm kan etablere sig p\u00e5 eksponerede metaloverflader. Bakterieceller (typisk 1-10 \u00b5m) s\u00e6tter sig fast i overfladefordybninger dybere end deres egen diameter, hvor reng\u00f8ringsmidler ikke kan n\u00e5 dem.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n
Ans\u00f8gningsposition<\/th>\nHACCP-zone<\/th>\nRa-krav<\/th>\nKan opn\u00e5s af<\/th>\n<\/tr>\n<\/thead>\n
Tandhjulsflanker (eksponerede)<\/td>\nZ1<\/td>\nRa \u2264 0,4 \u00b5m<\/td>\nCNC-slibning + elektropolering<\/td>\n<\/tr>\n
Akselt\u00e6tningsomr\u00e5der og akseltap<\/td>\nZ1\u2013Z2<\/td>\nRa \u2264 0,4 \u00b5m<\/td>\nCNC-drejning + pr\u00e6cisionsslibning<\/td>\n<\/tr>\n
Boring- og notfladeoverflader<\/td>\nZ2<\/td>\nRa \u2264 0,8 \u00b5m<\/td>\nCNC-boring + honing<\/td>\n<\/tr>\n
Husets ydre (afvaskning)<\/td>\nZ2\u2013Z3<\/td>\nRa \u2264 1,6 \u00b5m<\/td>\nStandardbearbejdning<\/td>\n<\/tr>\n
Ber\u00f8ringsfri strukturelle flader<\/td>\nZ3<\/td>\nRa \u2264 3,2 \u00b5m<\/td>\nStandard drejning<\/td>\n<\/tr>\n
Som st\u00f8bt \/ som svejset<\/td>\nIkke egnet<\/td>\nRa 6,3\u201325 \u00b5m<\/td>\nIkke acceptabelt i nogen f\u00f8devarezone<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Anvendelser af f\u00f8devaremaskiner og deres specifikke krav til udstyr<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n
Type f\u00f8devaremaskiner<\/th>\nZone<\/th>\nGearspecifikation<\/th>\nN\u00f8glerisiko ved forkert<\/th>\n<\/tr>\n<\/thead>\n
Sk\u00e6re- og portionsmaskine<\/td>\nZ1\u2013Z2<\/td>\nSS316, Ra \u2264 0,4 \u00b5m, NSF H1 PAO, SCM415 snekke<\/td>\nBakteriel husning; grubet\u00e6ring fra k\u00f8dsaft<\/td>\n<\/tr>\n
P\u00e5fyldnings- og dispenseringsudstyr<\/td>\nZ1<\/td>\nSS316L, Ra \u2264 0,4 \u00b5m elektropoleret, fuld dokumentation<\/td>\nProduktkontaminering; FDA-dokumentationsfejl<\/td>\n<\/tr>\n
Pakkelinjetransport\u00f8r<\/td>\nZ2\u2013Z3<\/td>\nSS316, Ra \u2264 0,8 \u00b5m, IP65-t\u00e6tning, NSF H1<\/td>\nKorrosion fra afvaskning; l\u00e6kage af sm\u00f8remiddel p\u00e5 emballagen<\/td>\n<\/tr>\n
Mejeriforarbejdningslinje<\/td>\nZ1\u2013Z2<\/td>\nSS316, elektropoleret, CIP-klassificeret forsegling, fuld sporbarhed<\/td>\nSyrekorrosion fra mejeriprodukter; biofilm i overfladefordybninger<\/td>\n<\/tr>\n
Bageri og dejh\u00e5ndtering<\/td>\nZ1\u2013Z2<\/td>\nSS316, Ra \u2264 0,8 \u00b5m, f\u00f8devaresikker bel\u00e6gning p\u00e5 ikke-SS-overflader<\/td>\nDej, der s\u00e6tter sig fast i overfladedefekter; g\u00e6rkontaminering<\/td>\n<\/tr>\n
Drikkevarep\u00e5fyldningslinje<\/td>\nZ2\u2013Z3<\/td>\nSS316 eller SS304 (kun Z3), IP54+, NSF H1 hvor st\u00e6nk er muligt<\/td>\nAngreb af kulsyreholdig syre p\u00e5 kulstofst\u00e5l; migration af sm\u00f8remiddel<\/td>\n<\/tr>\n
K\u00f8lerumstransport\u00f8r (\u221218\u00b0C)<\/td>\nZ2\u2013Z3<\/td>\nSS316, koldtemperatur NSF H1 PAO (VI > 150), IP65<\/td>\nOverbelastning ved lav temperaturviskositet; kondenskorrosion<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
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Feltteknik<\/p>\n

Fire specifikationer for snekkegear til f\u00f8devareforarbejdning \u2014 Revisionen, fejlen og l\u00f8sningen<\/h2>\n<\/div>\n
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Gyeonggi-do, Korea \u00b7 K\u00f8dfabrik<\/div>\n
HACCP-revisionsafvisning \u2014 Overfladefinish p\u00e5 snekkegear i zone 2<\/div>\n

En koreansk producent af forarbejdet k\u00f8d installerede sk\u00e6relinjedrev specificeret som 'snekkegear i rustfrit st\u00e5l'. Materialet var SS304. Finishen var Ra 3,2 \u00b5m p\u00e5 t\u00e6tningspunkterne. HACCP-revisionen fandt dette uacceptabelt for Zone 2-produkters st\u00e6nkomr\u00e5der.<\/p>\n

Lave:<\/strong> SS316 worm shaft with CNC-ground journal areas Ra \u2264 0.4 \u00b5m. Electropolished ZCuSn10Pb1 wheel flanks Ra \u2264 0.4 \u00b5m. Full material certificate, heat treatment record, CMM report, and surface finish measurement report shipped with each unit.<\/p>\n

\u2713 HACCP Zone 2 certification achieved \u2014 first audit post-replacement<\/div>\n<\/div>\n
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Chungcheongnam-do, Korea \u00b7 Dairy Equipment OEM<\/div>\n
Pitting Corrosion on SS304 Worm Shafts After 8 Months of CIP Cycling<\/div>\n

A Korean dairy equipment manufacturer experienced pitting corrosion on worm gear output shafts after approximately 8 months in service. The CIP protocol used NaOH at 1.5% at 75\u00b0C, followed by peracetic acid. Analysis confirmed chloride-induced pitting on the SS304 shaft journals \u2014 the farm water supply contained 180 ppm chloride, above the critical pitting temperature for SS304 at 75\u00b0C.<\/p>\n

Lave:<\/strong> SS304 \u2192 SS316 shaft (molybdenum suppresses pitting at CIP temperatures). No changes to dimensions or mounting. Material certification confirming Mo% included in delivery documentation to support the manufacturer’s CE technical file.<\/p>\n

\u2713 Zero pitting corrosion events over subsequent 30-month monitoring period<\/div>\n<\/div>\n
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Ho Chi Minh City, Vietnam \u00b7 Beverage Packaging<\/div>\n
NSF H2 Lubricant Leakage Contaminating Packaging \u2014 Audit Non-Conformance<\/div>\n

A Vietnamese beverage packager experienced lubricant leakage from worm gear drives onto packaging materials on their filling line. The drives were specified with NSF H2 lubricant (non-food-contact grade). While the quantity was small, the H2 designation was sufficient for the customer’s food safety auditor to issue a non-conformance.<\/p>\n

Lave:<\/strong> NSF H2 oil replaced with NSF H1 PAO ISO VG 220 throughout the drive system. Korea Ever-Power supplied replacement worm gear sets with upgraded shaft seals (dual-lip NBR with dust excluder). H1 lubricant certification documentation provided for inclusion in food safety management system files.<\/p>\n

\u2713 Non-conformance closed \u2014 packaging customer food safety audit passed<\/div>\n<\/div>\n
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Gyeonggi-do, Korea \u00b7 Frozen Food OEM<\/div>\n
Cold Room Conveyor Worm Gear Failure \u2014 Low-Temperature Lubricant Viscosity<\/div>\n

A frozen food manufacturer’s cold storage conveyor system used conventional ISO VG 460 mineral oil in the worm gear corner drives. The cold room operated at \u221218\u00b0C. ISO VG 460 mineral oil at \u221218\u00b0C has kinematic viscosity exceeding 4,000 cSt \u2014 over 8\u00d7 the design viscosity at operating temperature. The resulting viscous drag caused motor overcurrent on start-up.<\/p>\n

Lave:<\/strong> ISO VG 460 mineral oil \u2192 NSF H1 PAO synthetic ISO VG 220 (VI > 160). PAO at \u221218\u00b0C viscosity is approximately 650 cSt \u2014 a 2.5\u00d7 increase, well within motor and seal design margins. Worm gear sets unchanged. Lubricant certification added to food safety management documentation.<\/p>\n

\u2713 Motor overcurrent events eliminated \u2014 conveyor runs reliably at \u221218\u00b0C<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n
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Korea Ever-Power-produkter<\/span><\/p>\n

Food Grade Worm Gear Products<\/h2>\n<\/div>\n
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\"SS316<\/div>\n
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Zone 1 & Zone 2 \u00b7 Full Documentation<\/div>\n
SS316 Stainless Steel Worm Gear \u2014 Food Grade<\/div>\n
The primary specification for food processing Zone 1 and Zone 2 drive applications. SS316 worm shaft (2.0\u20133.0% molybdenum) resists chloride pitting in CIP environments where NaOH cleaning runs at 70\u201380\u00b0C \u2014 the failure condition that makes SS304 unsuitable for food production. Journal and sealing areas CNC-ground and electropolished to Ra \u2264 0.4 \u00b5m as standard. The matched worm wheel is available in SS316 (for Z1 direct contact) or ZCuSn10Pb1 tin bronze with electropolished flanks (for Z2 splash zone). Full documentation package: mill heat number certificate, heat treatment record, CMM dimensional report, surface roughness measurement report. PPAP Level 1\u20133 available for food machinery OEM supply programs.<\/div>\n
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Materiale<\/span>SS316 (2.0\u20133.0% Mo)<\/span><\/div>\n
Surface finish<\/span>Ra \u2264 0.4 \u00b5m electropolished<\/span><\/div>\n
Lubricant compat.<\/span>NSF H1 PAO, non-EP oils<\/span><\/div>\n
CIP resistance<\/span>NaOH 2%, HNO3 1%, PAA 0.5%<\/span><\/div>\n
HACCP-zone<\/span>Zone 1 and Zone 2<\/span><\/div>\n<\/div>\n

Se produktspecifikationer \u2192<\/a><\/p>\n<\/div>\n<\/div>\n

\n
\"Precision<\/div>\n
\n
Zone 2 \u00b7 Bronze or Full Stainless<\/div>\n
Precision Worm Wheel \u2014 Food Processing Grade<\/div>\n
Available in two configurations for food processing applications. The SS316 full-stainless variant is correct for Zone 1 direct product contact \u2014 hobbed from solid SS316 bar stock, with all tooth surfaces electropolished to Ra \u2264 0.4 \u00b5m. The ZCuSn10Pb1 tin bronze variant with electropolished flanks is correct for Zone 2 splash zone applications where the bronze anti-scuffing properties are needed at higher sliding velocities. Both variants are bore-machined to H7 tolerance on CMM and supplied with dimensional inspection report. Wheel tooth contact pattern tested on assembly rig before shipment \u2014 coverage \u2265 70% required, percentage documented.<\/div>\n
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Z1 material<\/span>SS316, fully electropolished<\/span><\/div>\n
Z2 material<\/span>ZCuSn10Pb1 + electropolished flanks<\/span><\/div>\n
Boringstolerance<\/span>H7 CMM verified<\/span><\/div>\n
Contact pattern<\/span>\u2265 70% documented<\/span><\/div>\n<\/div>\n

Se produktspecifikationer \u2192<\/a><\/p>\n<\/div>\n<\/div>\n

\n
\"Food<\/div>\n
\n
Documentation \u00b7 Audit Support<\/div>\n
Food Safety Documentation Package<\/div>\n
For food machinery OEMs and production facilities that must maintain food safety management system documentation, Korea Ever-Power provides a structured documentation package that supports HACCP audit, CE\/KS certification, and customer food safety system compliance. The standard package includes: material certificate to mill heat number, heat treatment record, CMM dimensional inspection report, surface roughness measurement report, and contact pattern photograph. Extended PPAP Level 1, 2, or 3 packages available. All documentation retained for 5 years from shipment date and available on request at no additional charge.<\/div>\n
\n
Standard docs<\/span>Mat. cert + CMM + surface Ra<\/span><\/div>\n
PPAP<\/span>Level 1, 2, or 3 available<\/span><\/div>\n
Biocompatibility<\/span>ISO 10993-1 ref. available<\/span><\/div>\n
Retention<\/span>5 years from shipment<\/span><\/div>\n<\/div>\n

Se produktspecifikationer \u2192<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

\n
\n

Food Processing FAQ<\/span><\/p>\n

Questions from Food Machinery Engineers and Quality Managers<\/h2>\n<\/div>\n
\nWhat is the difference between NSF H1 and NSF H2 lubricants, and which do I need for a worm gear drive in a food facility?+<\/span><\/summary>\n
\n

NSF H1 lubricants are formulated for applications where incidental contact with food product is possible. They use food-approved base oils and additive packages. NSF H2 lubricants are for non-food-contact surfaces only \u2014 they may contain additives that are not approved for food contact. For any worm gear drive in HACCP Zone 1 or Zone 2 \u2014 which includes most conveyor drives, portioning drives, filling drives, and agitator drives in food production areas \u2014 specify NSF H1. If there is any doubt about whether a drive position is Zone 2 or Zone 3, default to H1. The cost difference between H1 and H2 lubricants is small; the cost of a food safety non-conformance is not.<\/p>\n<\/div>\n<\/details>\n

\nCan a tin bronze worm wheel be used in a food processing application, or must the wheel also be stainless steel?+<\/span><\/summary>\n
\n

Tin bronze worm wheels are acceptable in HACCP Zone 2 (splash zone) food processing applications when the wheel flanks are electropolished to Ra \u2264 0.8 \u00b5m and the drive is adequately sealed against product ingress. In Zone 2, the risk is surface bacterial adhesion, not product contact \u2014 and a properly electropolished bronze surface provides adequate resistance. The case for bronze over stainless steel in Zone 2 is the tribological advantage: bronze provides better anti-scuffing performance at the sliding contact velocities typical of food machinery drives (1\u20136 m\/s), particularly when using NSF H1 lubricants that lack EP additives. For Zone 1 direct product contact, the wheel must be SS316 or another FDA-acceptable material.<\/p>\n<\/div>\n<\/details>\n

\nHow do I specify a worm gear set for a cold room conveyor operating at \u221220\u00b0C?+<\/span><\/summary>\n
\n

Three elements require attention for sub-zero operation. First, lubricant: ISO VG 460 mineral oil at \u221220\u00b0C reaches viscosities of 4,000\u20138,000 cSt, causing severe viscous drag and motor overcurrent. Specify NSF H1 synthetic PAO ISO VG 100 or 150, which maintains approximately 300\u2013500 cSt at \u221220\u00b0C. Second, seal material: standard NBR seals become brittle below \u221220\u00b0C; specify FKM (Viton) or silicone seals. Third, housing material: standard ductile iron housings are acceptable to \u221230\u00b0C; below \u221230\u00b0C, specify ferritic stainless steel or aluminium housing to avoid brittle fracture risk.<\/p>\n<\/div>\n<\/details>\n

\nDoes Korea Ever-Power supply PPAP documentation for food machinery OEM supply programs?+<\/span><\/summary>\n
\n

Yes. PPAP Level 1 (Part Submission Warrant), Level 2 (PSW + limited supporting documentation), and Level 3 (PSW + full supporting documentation) are available for established supply programs. Confirm the required PPAP level at order placement \u2014 Level 3 requires additional production documentation lead time and should be agreed in the initial order confirmation. PPAP is not available on first-order prototype or sample quantities; it is available for production supply programs after sample approval.<\/p>\n<\/div>\n<\/details>\n

\nWhat cleaning agents can I use on an SS316 worm gear shaft in a CIP cleaning cycle?+<\/span><\/summary>\n
\n

SS316 is compatible with: sodium hydroxide (NaOH) at up to 4% concentration, 80\u00b0C; phosphoric acid (H3PO4) at up to 2%, 60\u00b0C; nitric acid (HNO3) at up to 2%, 60\u00b0C; peracetic acid (PAA) at up to 0.3%, 40\u00b0C; and chlorinated alkaline CIP agents at up to 200 ppm active chlorine, 50\u00b0C. Avoid CIP solutions containing hydrochloric acid (HCl) \u2014 this will cause rapid pitting corrosion on all grades of stainless steel.<\/p>\n<\/div>\n<\/details>\n

\nDo I need to disclose the worm gear material and lubricant to my food safety auditor?+<\/span><\/summary>\n
\n

For equipment in Zone 1 and Zone 2, yes. Your HACCP documentation should include a list of all materials in contact with or adjacent to food product, including drive train materials and lubricants. The documentation package from Korea Ever-Power (material certificate, lubricant compatibility confirmation, surface finish report) provides the information needed for this disclosure. If your facility undergoes IFS, BRC, or SQF certification in addition to HACCP, additional disclosure requirements may apply.<\/p>\n<\/div>\n<\/details>\n

\nCan I use the same worm gear set in both a food processing facility and a pharmaceutical manufacturing facility?+<\/span><\/summary>\n
\n

The material specification (SS316, Ra \u2264 0.4 \u00b5m electropolished) is the same. The documentation requirements differ. Food processing facilities typically require NSF\/FDA compliance documentation. Pharmaceutical manufacturing facilities under GMP regulations require additional documentation: ISO 10993-1 biocompatibility grouping, material traceability to starting stock, and PPAP or equivalent qualification documentation. Korea Ever-Power can provide the standard food-grade documentation package for food applications and the extended pharmaceutical package for GMP applications \u2014 confirm which documentation standard applies at order placement.<\/p>\n<\/div>\n<\/details>\n

\nHow do I handle lubricant change intervals for a worm gear drive in a food processing environment?+<\/span><\/summary>\n
\n

NSF H1 PAO synthetic gear oils have extended drain intervals compared to mineral oils \u2014 typically 3,000\u20134,000 operating hours for enclosed drives at normal operating temperatures. For food processing applications where the housing temperature remains below 60\u00b0C, an annual oil change (or every 2,000 hours, whichever comes first) is appropriate. The first oil change after any gear replacement or new installation should be at 50\u2013100 operating hours to remove running-in bronze wear particles. Use only NSF H1 certified lubricants for top-up \u2014 mixing H1 and H2 lubricants in a Zone 1 or Zone 2 drive invalidates the H1 compliance of the entire fill.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

\n
\n

Specify Your Food Grade Worm Gear Drive<\/h2>\n

Provide HACCP zone, machine type, drive position, sliding velocity, lubricant requirement, and documentation standard (HACCP, BRC, IFS, PPAP). Korea Ever-Power returns a complete food-grade specification with surface finish confirmation and documentation availability within one working day.<\/p>\n

\n

\u2699 Browse Stainless Steel Worm Gears<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n

Redakt\u00f8r: Cxm<\/p>","protected":false},"excerpt":{"rendered":"

Application Engineering Guide \u00b7 A5 \u2713 HACCP Zone 1&2 \u2713 SS316 Electropolished \u2713 NSF H1 Compatible \u2713 Full Documentation “Stainless Steel Worm Gear”\u00a0Is Not the Same as Food Grade An SS304 worm gear passes visual inspection. It fails a HACCP Zone 1 audit. The surface finish, lubricant certification, and documentation trail determine whether your machine […]<\/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-1875","post","type-post","status-publish","format-standard","hentry","category-worm-gear","tag-worm-gear","tag-worm-gear-worm"],"_links":{"self":[{"href":"https:\/\/wormwheelgear.top\/da\/wp-json\/wp\/v2\/posts\/1875","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wormwheelgear.top\/da\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wormwheelgear.top\/da\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wormwheelgear.top\/da\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wormwheelgear.top\/da\/wp-json\/wp\/v2\/comments?post=1875"}],"version-history":[{"count":4,"href":"https:\/\/wormwheelgear.top\/da\/wp-json\/wp\/v2\/posts\/1875\/revisions"}],"predecessor-version":[{"id":1879,"href":"https:\/\/wormwheelgear.top\/da\/wp-json\/wp\/v2\/posts\/1875\/revisions\/1879"}],"wp:attachment":[{"href":"https:\/\/wormwheelgear.top\/da\/wp-json\/wp\/v2\/media?parent=1875"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wormwheelgear.top\/da\/wp-json\/wp\/v2\/categories?post=1875"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wormwheelgear.top\/da\/wp-json\/wp\/v2\/tags?post=1875"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}