{"id":5582,"date":"2025-12-22T08:33:37","date_gmt":"2025-12-22T08:33:37","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5582"},"modified":"2025-12-22T08:34:32","modified_gmt":"2025-12-22T08:34:32","slug":"gb-t-3103-3-2020-flat-washer-tolerances-guide","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/nl\/blog\/gb-t-3103-3-2020-flat-washer-tolerances-guide\/","title":{"rendered":"GB\/T 3103.3-2020 Richtlijn voor toleranties van platte ringen"},"content":{"rendered":"

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GB\/T 3103.3-2020 Richtlijn voor toleranties van platte ringen<\/h1>\n
Toleranties voor platte ringen<\/div>\n

<\/p>\n

\n

1. Inleiding<\/h2>\n

Platte ringen spelen een cruciale rol in bevestigingssystemen door de belasting te verdelen, oppervlakteschade te voorkomen en de integriteit van de assemblage te waarborgen. De GB\/T 3103.3-2020-norm specificeert toleranties voor vlakke ringen met nominale diameters van 1 mm tot 150 mm, van toepassing op productkwaliteiten A, C en F. Deze norm is essentieel voor het handhaven van precisie in de machinebouw, automobielindustrie, lucht- en ruimtevaart en de bouw.<\/p>\n

Deze norm, afgeleid van ISO 4759-3:2016, garandeert compatibiliteit met internationale praktijken en bevordert kwaliteitscontrole en uitwisselbaarheid. De richtlijn beschrijft toleranties voor binnendiameter, buitendiameter, wanddikte, afschuiningen en vorm-\/positiekenmerken, en ondersteunt ingenieurs bij ontwerp en inkoop.<\/p>\n<\/div>\n

<\/p>\n

\n

2. Overzicht van de GB\/T 3103.3-2020-norm<\/h2>\n

Deze norm, uitgebracht in 2020 door de Chinese standaardisatieautoriteit, actualiseert eerdere versies om aan te sluiten bij de wereldwijde ontwikkelingen in bevestigingstechnologie. De norm is van toepassing op vlakke ringen die worden gebruikt met bouten, schroeven en moeren, met uitzondering van speciale typen zoals borgringen.<\/p>\n

De belangrijkste inhoud omvat maattoleranties v\u00f3\u00f3r oppervlaktebehandeling, waarbij afwijkingen alleen zijn toegestaan \u200b\u200bindien technisch gerechtvaardigd. Vorm- en positietoleranties volgen GB\/T 1182 en GB\/T 16671.<\/p>\n<\/div>\n

<\/p>\n

\n

3. Basisprincipes van toleranties voor platte ringen<\/h2>\n

Toleranties zorgen ervoor dat ringen precies in de assemblage passen, waardoor defecten als gevolg van verkeerde uitlijning of overmatige speling worden voorkomen. Ze zijn gedefinieerd voor productkwaliteiten: A (precisie), C (algemeen) en F (fijn). Tenzij anders gespecificeerd, zijn de toleranties van toepassing v\u00f3\u00f3r de behandeling.<\/p>\n

Belangrijke parameters zijn onder meer de binnendiameter (d).1<\/sub>), buitendiameter (d2<\/sub>), dikte (t), afschuiningen (c1<\/sub>, C2<\/sub>), en vormtoleranties zoals coaxialiteit en vlakheid.<\/p>\n<\/div>\n

<\/p>\n

\n

4. Gedetailleerde tolerantiespecificaties<\/h2>\n
4.1 Binnenste gat d1<\/sub><\/div>\n

 <\/p>\n

Toleranties voor binnengat d1<\/sub> verschillen per dikte en productkwaliteit.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
Dikte<\/th>\nToleranties<\/th>\n<\/tr>\n
Productkwaliteit<\/th>\n<\/tr>\n
F<\/th>\nA<\/th>\nC<\/th>\n<\/tr>\n<\/thead>\n
t < 2
\n2 \u2264 t < 4
\nt \u2265 4<\/td>\n		D1<\/sub>
\nTolerantie<\/td>\n		T1<\/sub>
\nmin<\/td>\n		e1<\/sub>
\nmax<\/td>\n		D1<\/sub>
\nTolerantie<\/td>\n		T1<\/sub>
\nmin<\/td>\n		e1<\/sub>
\nmax<\/td>\n		D1<\/sub>
\nTolerantie<\/td>\n<\/tr>\n
H12<\/td>\n0,5 t<\/td>\n0,10 t<\/td>\nH13<\/td>\n0,3 t<\/td>\n0,15 t<\/td>\nH14<\/td>\n<\/tr>\n
H12<\/td>\n0,3 t<\/td>\n0,15 t<\/td>\nH13<\/td>\n0,25 t<\/td>\n0,20 t<\/td>\nH14<\/td>\n<\/tr>\n
H13<\/td>\n0,2 t<\/td>\n0,20 t<\/td>\nH14<\/td>\n0,2 t<\/td>\n0,25 t<\/td>\nH15<\/td>\n<\/tr>\n
Burring is niet gedefinieerd, maar wel toegestaan.<\/td>\nScheurband (e1<\/sub>), T1<\/sub> en het begraven is niet gedefinieerd, maar wel toegestaan.<\/td>\n<\/tr>\n
T1<\/sub> is het gedeelte van het gat binnen de gespecificeerde tolerantie van d1<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
4.2 Buitendiameter d2<\/sub><\/div>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
Dikte<\/th>\nToleranties<\/th>\n<\/tr>\n
Productkwaliteit<\/th>\n<\/tr>\n
F<\/th>\nA<\/th>\nC<\/th>\n<\/tr>\n<\/thead>\n
t < 2
\n2 \u2264 t < 4
\nt \u2265 4<\/td>\n		D2<\/sub>
\nTolerantie<\/td>\n		e2<\/sub>
\nmax<\/td>\n		D2<\/sub>
\nTolerantie<\/td>\n		e2<\/sub>
\nmax<\/td>\n		D2<\/sub>
\nTolerantie<\/td>\n<\/tr>\n
h13<\/td>\n0,13 t<\/td>\nh14<\/td>\n0,18 t<\/td>\nh16<\/td>\n<\/tr>\n
h13<\/td>\n0,15 t<\/td>\nh14<\/td>\n0,20 t<\/td>\nh16<\/td>\n<\/tr>\n
h14<\/td>\n0,18 t<\/td>\nh15<\/td>\n0,25 t<\/td>\nh16<\/td>\n<\/tr>\n
Burring en t2<\/sub> niet gedefinieerd maar toegestaan<\/td>\nScheurband (e2<\/sub>), T2<\/sub> en het begraven is niet gedefinieerd, maar wel toegestaan.<\/td>\n<\/tr>\n
T2<\/sub> is het gedeelte van de buitendiameter binnen de gespecificeerde tolerantie van d2<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
4.3 Dikte t<\/div>\n

Diktetoleranties gemeten na het ontbramen.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
Dikte t<\/th>\nProductkwaliteit<\/th>\n<\/tr>\n
F<\/th>\nA<\/th>\nC<\/th>\n<\/tr>\n<\/thead>\n
t \u2264 0,5<\/td>\n\u00b10,04<\/td>\n\u00b10,05<\/td>\n\u00b10,10<\/td>\n<\/tr>\n
0,5 < t \u2264 1<\/td>\n\u00b10,06<\/td>\n\u00b10,10<\/td>\n\u00b10,20<\/td>\n<\/tr>\n
1 < t \u2264 2,5<\/td>\n\u00b10,12<\/td>\n\u00b10,20<\/td>\n\u00b10,30<\/td>\n<\/tr>\n
2,5 < t \u2264 4<\/td>\n\u00b10,16<\/td>\n\u00b10,30<\/td>\n\u00b10,60<\/td>\n<\/tr>\n
4 < t \u2264 6<\/td>\n\u00b10,20<\/td>\n\u00b10,60<\/td>\n\u00b11,00<\/td>\n<\/tr>\n
6 < t \u2264 10<\/td>\n\u00b10,24<\/td>\n\u00b11,00<\/td>\n\u00b11,20<\/td>\n<\/tr>\n
10 < t \u2264 20<\/td>\n\u00b10,28<\/td>\n\u00b11,20<\/td>\n\u00b11,60<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
4.4 Afschuiningen<\/div>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n
Nominale dikte<\/th>\nProductkwaliteit<\/th>\n<\/tr>\n
F<\/th>\nA<\/th>\nC<\/th>\n<\/tr>\n
c1<\/sub>
\nmin<\/th>\n		c2<\/sub>
\nmin<\/th>\n		c1<\/sub>
\nmin<\/th>\n		c2<\/sub>
\nmin<\/th>\n		c1<\/sub>
\nmin<\/th>\n		c2<\/sub>
\nmin<\/th>\n<\/tr>\n<\/thead>\n
1 \u2264 t < 2<\/td>\n0,20 t<\/td>\n0,25 t<\/td>\n0,20 t<\/td>\n0,25 t<\/td>\n0,20 t<\/td>\n0,25 t<\/td>\n<\/tr>\n
2 \u2264 t < 4<\/td>\n0,18 t<\/td>\n0,22 t<\/td>\n0,18 t<\/td>\n0,22 t<\/td>\n0,18 t<\/td>\n0,22 t<\/td>\n<\/tr>\n
t \u2265 4<\/td>\n0,15 t<\/td>\n0,20 t<\/td>\n0,15 t<\/td>\n0,20 t<\/td>\n0,15 t<\/td>\n0,20 t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
4.4.3 Aanvullende eisen voor gecombineerde wasmachines<\/div>\n

Op verzoek van de koper dient de positie van de afschuining ten opzichte van stempelafwijkingen in de bestelling te worden gespecificeerd.<\/p>\n

4.5 Vorm- en positietoleranties<\/div>\n

\u0394t geldt buiten x = 0,1 (d2<\/sub> - D1<\/sub>), oftewel 60% ringbreedte.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Dikte t<\/th>\nProductkwaliteit<\/th>\n<\/tr>\n
F<\/th>\nA<\/th>\nC<\/th>\n<\/tr>\n
\u0394t
\nmax<\/th>\n		\u0394t
\nmax<\/th>\n		<\/th>\n<\/tr>\n<\/thead>\n
t \u2264 0,5<\/td>\n0.02<\/td>\n0.025<\/td>\nGeen vereiste<\/td>\n<\/tr>\n
0,5 < t \u2264 1<\/td>\n0.03<\/td>\n0.05<\/td>\n<\/tr>\n
1 < t \u2264 2,5<\/td>\n0.06<\/td>\n0.1<\/td>\n<\/tr>\n
2,5 < t \u2264 4<\/td>\n0.08<\/td>\n0.15<\/td>\n<\/tr>\n
4 < t \u2264 6<\/td>\n0.1<\/td>\n0.2<\/td>\n<\/tr>\n
6 < t \u2264 10<\/td>\n0.12<\/td>\n0.3<\/td>\n<\/tr>\n
10 < t \u2264 20<\/td>\n0.14<\/td>\n0.4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
4.5.2 Coaxialiteit y<\/div>\n\n\n\n\n\n\n\n\n\n\n
Dikte t<\/th>\nProductkwaliteit<\/th>\n<\/tr>\n
F<\/th>\nA<\/th>\nC<\/th>\n<\/tr>\n
y
\nmax<\/th>\n		y
\nmax<\/th>\n		y
\nmax<\/th>\n<\/tr>\n<\/thead>\n
t < 2<\/td>\n2 IT11<\/td>\n2 IT12<\/td>\n2 IT13<\/td>\n<\/tr>\n
2 \u2264 t \u2264 4<\/td>\n2 IT12<\/td>\n2 IT13<\/td>\n2 IT14<\/td>\n<\/tr>\n
t \u2265 4<\/td>\n2 IT13<\/td>\n2 IT14<\/td>\n2 IT15<\/td>\n<\/tr>\n
Tolerantie y gebaseerd op diameter d2<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
4.5.3 Vlakheid (Doorbuiging) z<\/div>\n

De vlakheid z is het verschil tussen de effectieve hoogte h.eff<\/sub> en effectieve dikte teff<\/sub>Opmerking: Onafhankelijk van de diktetolerantie; aanvullende processen zoals slijpen kunnen de doorbuiging verminderen. Gemeten na het ontbramen.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Dikte t<\/th>\nProductkwaliteit<\/th>\n<\/tr>\n
F<\/th>\nA<\/th>\nC<\/th>\n<\/tr>\n
z
\nmax<\/th>\n		z
\nmax<\/th>\n		z
\nmax<\/th>\n<\/tr>\n<\/thead>\n
t \u2264 0,5<\/td>\n0.07<\/td>\n0.1<\/td>\n0.13<\/td>\n<\/tr>\n
0,5 < t \u2264 1<\/td>\n0.1<\/td>\n0.15<\/td>\n0.2<\/td>\n<\/tr>\n
1 < t \u2264 2,5<\/td>\n0.2<\/td>\n0.2<\/td>\n0.25<\/td>\n<\/tr>\n
2,5 < t \u2264 4<\/td>\n0.3<\/td>\n0.3<\/td>\n0.3<\/td>\n<\/tr>\n
4 < t \u2264 6<\/td>\n0.4<\/td>\n0.4<\/td>\n0.4<\/td>\n<\/tr>\n
6 < t \u2264 10<\/td>\n0.6<\/td>\n0.6<\/td>\n0.6<\/td>\n<\/tr>\n
10 < t \u2264 20<\/td>\n1<\/td>\n1<\/td>\n1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

\n

5. Belangrijkste vereisten in GB\/T 3103.3-2020<\/h2>\n

Toleranties moeten v\u00f3\u00f3r de oppervlaktebehandeling worden gecontroleerd. Productnormen hebben voorrang indien deze afwijken. Dikte- en vlakheidsmetingen worden na het ontbramen uitgevoerd om nauwkeurigheid te garanderen.<\/p>\n<\/div>\n

<\/p>\n

\n

6. Nauwkeurigheids- en foutenanalyse<\/h2>\n

Fouten kunnen ontstaan \u200b\u200btijdens productieprocessen zoals stempelen, wat kan leiden tot bramen of problemen met de coaxialiteit. Verbeter de nauwkeurigheid door middel van precieze gereedschappen en nabewerking. Veelvoorkomende fouten zijn onder andere het negeren van afschuiningsspecificaties; los dit op door de materiaalspecifieke tabellen te volgen.<\/p>\n<\/div>\n

<\/p>\n

\n

7. Impact van GB\/T 3103.3-2020 op de industrie<\/h2>\n

Deze norm verbetert materiaalonderzoek door toleranties te standaardiseren, helpt bij kwaliteitscontrole in de productie en ondersteunt toepassingen in sectoren met hoge precisie, zoals de lucht- en ruimtevaart, waar ringen van klasse A betrouwbaarheid garanderen.<\/p>\n<\/div>\n

<\/p>\n

\n

8. Veelgestelde vragen (FAQ)<\/h2>\n
\n

Wat is het verschil tussen productkwaliteiten A, C en F?<\/h3>\n

Kwaliteit A biedt de strakste toleranties voor precisietoepassingen, C voor algemeen gebruik en F voor fijne toleranties in specifieke scenario's, zoals gedetailleerd in de tabellen.<\/p>\n<\/div>\n

\n

Wanneer moeten toleranties worden gemeten?<\/h3>\n

De toleranties gelden v\u00f3\u00f3r de oppervlaktebehandeling, waarbij de dikte en vlakheid na het ontbramen worden gemeten om onnauwkeurigheden als gevolg van fabricagefouten te voorkomen.<\/p>\n<\/div>\n

\n

Hoe verhoudt deze norm zich tot ISO 4759-3?<\/h3>\n

GB\/T 3103.3-2020 is equivalent aan ISO 4759-3:2016, wat wereldwijde compatibiliteit garandeert voor toleranties op vlakke ringen.<\/p>\n<\/div>\n

\n

Wat als de productnormen hiervan afwijken?<\/h3>\n

Productspecifieke normen hebben voorrang, maar afwijkingen vereisen een technische onderbouwing.<\/p>\n<\/div>\n

\n

Zijn afschuiningen verplicht?<\/h3>\n

Er worden minimale afschuiningen gespecificeerd om scherpe randen te voorkomen, waarbij de waarden gebaseerd zijn op dikte en kwaliteit; voor gecombineerde ringen kan de positie gespecificeerd moeten worden.<\/p>\n<\/div>\n

\n

Hoe kies je het juiste cijfer voor een aanvraag?<\/h3>\n

Kies op basis van montageprecisie: A voor kritische onderdelen met hoge belasting, C voor standaard boutverbindingen, rekening houdend met factoren zoals trillingen en lastverdeling.<\/p>\n<\/div>\n<\/div>\n

<\/div>\n

<\/p>\n<\/div>\n

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GB\/T 3103.3-2020 Richtlijn voor toleranties van platte ringen Toleranties voor platte ringen 1. Inleiding Platte ringen spelen een cruciale rol in bevestigingssystemen door de belasting te verdelen, oppervlakteschade te voorkomen en de integriteit van de assemblage te waarborgen. De GB\/T 3103.3-2020-norm specificeert toleranties voor vlakke ringen met nominale diameters van 1 mm tot 150 mm, van toepassing op productkwaliteiten A, [\u2026]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"

\r\n\r\n\r\n

GB\/T 3103.3-2020 Flat Washer Tolerances Guide<\/h1>\r\n
Tolerances for Flat Washers<\/div>\r\n\r\n
\r\n

1. Introduction<\/h2>\r\nFlat washers play a critical role in fastening systems by distributing loads, preventing surface damage, and ensuring assembly integrity. The GB\/T 3103.3-2020 standard specifies tolerances for plain flat washers with nominal diameters from 1 mm to 150 mm, applicable to product grades A, C, and F. This standard is essential for maintaining precision in mechanical engineering, automotive, aerospace, and construction industries.\r\n\r\nAdopted from ISO 4759-3:2016, it ensures compatibility with international practices, promoting quality control and interchangeability. This guide details tolerances for inner hole, outer diameter, thickness, chamfers, and form\/position attributes, aiding engineers in design and procurement.\r\n\r\n<\/div>\r\n\r\n
\r\n

2. GB\/T 3103.3-2020 Standard Overview<\/h2>\r\nReleased in 2020 by the Standardization Administration of China, this standard updates previous versions to align with global advancements in fastener technology. It applies to plain washers used with bolts, screws, and nuts, excluding special types like lock washers.\r\n\r\nKey content includes dimensional tolerances before surface treatment, with provisions for deviations only when technically justified. Shape and position tolerances follow GB\/T 1182 and GB\/T 16671.\r\n\r\n<\/div>\r\n\r\n
\r\n

3. Basic Principles of Flat Washer Tolerances<\/h2>\r\nTolerances ensure washers fit precisely in assemblies, preventing failures due to misalignment or excessive play. They are defined for product grades: A (precision), C (general), and F (fine). Unless specified otherwise, tolerances apply pre-treatment.\r\n\r\nKey parameters include inner diameter (d1<\/sub>), outer diameter (d2<\/sub>), thickness (t), chamfers (c1<\/sub>, c2<\/sub>), and form tolerances like coaxiality and flatness.\r\n\r\n<\/div>\r\n\r\n
\r\n

4. Detailed Tolerance Specifications<\/h2>\r\n
4.1 Inner Hole d1<\/sub><\/div>\r\n \r\n

Tolerances for inner hole d1<\/sub> vary by thickness and product grade.<\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Thickness<\/th>\r\nTolerances<\/th>\r\n<\/tr>\r\n
Product Grade<\/th>\r\n<\/tr>\r\n
F<\/th>\r\nA<\/th>\r\nC<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
t < 2\r\n2 \u2264 t < 4\r\nt \u2265 4<\/td>\r\nd1<\/sub>\r\nTolerance<\/td>\r\nt1<\/sub>\r\nmin<\/td>\r\ne1<\/sub>\r\nmax<\/td>\r\nd1<\/sub>\r\nTolerance<\/td>\r\nt1<\/sub>\r\nmin<\/td>\r\ne1<\/sub>\r\nmax<\/td>\r\nd1<\/sub>\r\nTolerance<\/td>\r\n<\/tr>\r\n
H12<\/td>\r\n0.5 t<\/td>\r\n0.10 t<\/td>\r\nH13<\/td>\r\n0.3 t<\/td>\r\n0.15 t<\/td>\r\nH14<\/td>\r\n<\/tr>\r\n
H12<\/td>\r\n0.3 t<\/td>\r\n0.15 t<\/td>\r\nH13<\/td>\r\n0.25 t<\/td>\r\n0.20 t<\/td>\r\nH14<\/td>\r\n<\/tr>\r\n
H13<\/td>\r\n0.2 t<\/td>\r\n0.20 t<\/td>\r\nH14<\/td>\r\n0.2 t<\/td>\r\n0.25 t<\/td>\r\nH15<\/td>\r\n<\/tr>\r\n
Burring not defined but permitted<\/td>\r\nTear band (e1<\/sub>), t1<\/sub> and burring not defined but permitted<\/td>\r\n<\/tr>\r\n
t1<\/sub> is the portion of the hole within the specified tolerance of d1<\/sub><\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n
4.2 Outer Diameter d2<\/sub><\/div>\r\n \r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Thickness<\/th>\r\nTolerances<\/th>\r\n<\/tr>\r\n
Product Grade<\/th>\r\n<\/tr>\r\n
F<\/th>\r\nA<\/th>\r\nC<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
t < 2\r\n2 \u2264 t < 4\r\nt \u2265 4<\/td>\r\nd2<\/sub>\r\nTolerance<\/td>\r\ne2<\/sub>\r\nmax<\/td>\r\nd2<\/sub>\r\nTolerance<\/td>\r\ne2<\/sub>\r\nmax<\/td>\r\nd2<\/sub>\r\nTolerance<\/td>\r\n<\/tr>\r\n
h13<\/td>\r\n0.13 t<\/td>\r\nh14<\/td>\r\n0.18 t<\/td>\r\nh16<\/td>\r\n<\/tr>\r\n
h13<\/td>\r\n0.15 t<\/td>\r\nh14<\/td>\r\n0.20 t<\/td>\r\nh16<\/td>\r\n<\/tr>\r\n
h14<\/td>\r\n0.18 t<\/td>\r\nh15<\/td>\r\n0.25 t<\/td>\r\nh16<\/td>\r\n<\/tr>\r\n
Burring and t2<\/sub> not defined but permitted<\/td>\r\nTear band (e2<\/sub>), t2<\/sub> and burring not defined but permitted<\/td>\r\n<\/tr>\r\n
t2<\/sub> is the portion of the outer diameter within the specified tolerance of d2<\/sub><\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n
4.3 Thickness t<\/div>\r\n

Thickness tolerances measured after deburring.<\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Thickness t<\/th>\r\nProduct Grade<\/th>\r\n<\/tr>\r\n
F<\/th>\r\nA<\/th>\r\nC<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
t \u2264 0.5<\/td>\r\n\u00b10.04<\/td>\r\n\u00b10.05<\/td>\r\n\u00b10.10<\/td>\r\n<\/tr>\r\n
0.5 < t \u2264 1<\/td>\r\n\u00b10.06<\/td>\r\n\u00b10.10<\/td>\r\n\u00b10.20<\/td>\r\n<\/tr>\r\n
1 < t \u2264 2.5<\/td>\r\n\u00b10.12<\/td>\r\n\u00b10.20<\/td>\r\n\u00b10.30<\/td>\r\n<\/tr>\r\n
2.5 < t \u2264 4<\/td>\r\n\u00b10.16<\/td>\r\n\u00b10.30<\/td>\r\n\u00b10.60<\/td>\r\n<\/tr>\r\n
4 < t \u2264 6<\/td>\r\n\u00b10.20<\/td>\r\n\u00b10.60<\/td>\r\n\u00b11.00<\/td>\r\n<\/tr>\r\n
6 < t \u2264 10<\/td>\r\n\u00b10.24<\/td>\r\n\u00b11.00<\/td>\r\n\u00b11.20<\/td>\r\n<\/tr>\r\n
10 < t \u2264 20<\/td>\r\n\u00b10.28<\/td>\r\n\u00b11.20<\/td>\r\n\u00b11.60<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n
4.4 Chamfers<\/div>\r\n \r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Nominal Thickness<\/th>\r\nProduct Grade<\/th>\r\n<\/tr>\r\n
F<\/th>\r\nA<\/th>\r\nC<\/th>\r\n<\/tr>\r\n
c1<\/sub>\r\nmin<\/th>\r\nc2<\/sub>\r\nmin<\/th>\r\nc1<\/sub>\r\nmin<\/th>\r\nc2<\/sub>\r\nmin<\/th>\r\nc1<\/sub>\r\nmin<\/th>\r\nc2<\/sub>\r\nmin<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
1 \u2264 t < 2<\/td>\r\n0.20 t<\/td>\r\n0.25 t<\/td>\r\n0.20 t<\/td>\r\n0.25 t<\/td>\r\n0.20 t<\/td>\r\n0.25 t<\/td>\r\n<\/tr>\r\n
2 \u2264 t < 4<\/td>\r\n0.18 t<\/td>\r\n0.22 t<\/td>\r\n0.18 t<\/td>\r\n0.22 t<\/td>\r\n0.18 t<\/td>\r\n0.22 t<\/td>\r\n<\/tr>\r\n
t \u2265 4<\/td>\r\n0.15 t<\/td>\r\n0.20 t<\/td>\r\n0.15 t<\/td>\r\n0.20 t<\/td>\r\n0.15 t<\/td>\r\n0.20 t<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n
4.4.3 Combined Washers Supplementary Requirements<\/div>\r\nUpon buyer request, chamfer position relative to stamping deviations should be specified in the order.\r\n
4.5 Form and Position Tolerances<\/div>\r\n

\u0394t applies outside x = 0.1 (d2<\/sub> - d1<\/sub>), i.e., 60% of ring width.<\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Thickness t<\/th>\r\nProduct Grade<\/th>\r\n<\/tr>\r\n
F<\/th>\r\nA<\/th>\r\nC<\/th>\r\n<\/tr>\r\n
\u0394t\r\nmax<\/th>\r\n\u0394t\r\nmax<\/th>\r\n<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
t \u2264 0.5<\/td>\r\n0.02<\/td>\r\n0.025<\/td>\r\nNo requirement<\/td>\r\n<\/tr>\r\n
0.5 < t \u2264 1<\/td>\r\n0.03<\/td>\r\n0.05<\/td>\r\n<\/tr>\r\n
1 < t \u2264 2.5<\/td>\r\n0.06<\/td>\r\n0.1<\/td>\r\n<\/tr>\r\n
2.5 < t \u2264 4<\/td>\r\n0.08<\/td>\r\n0.15<\/td>\r\n<\/tr>\r\n
4 < t \u2264 6<\/td>\r\n0.1<\/td>\r\n0.2<\/td>\r\n<\/tr>\r\n
6 < t \u2264 10<\/td>\r\n0.12<\/td>\r\n0.3<\/td>\r\n<\/tr>\r\n
10 < t \u2264 20<\/td>\r\n0.14<\/td>\r\n0.4<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n
4.5.2 Coaxiality y<\/div>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Thickness t<\/th>\r\nProduct Grade<\/th>\r\n<\/tr>\r\n
F<\/th>\r\nA<\/th>\r\nC<\/th>\r\n<\/tr>\r\n
y\r\nmax<\/th>\r\ny\r\nmax<\/th>\r\ny\r\nmax<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
t < 2<\/td>\r\n2 IT11<\/td>\r\n2 IT12<\/td>\r\n2 IT13<\/td>\r\n<\/tr>\r\n
2 \u2264 t \u2264 4<\/td>\r\n2 IT12<\/td>\r\n2 IT13<\/td>\r\n2 IT14<\/td>\r\n<\/tr>\r\n
t \u2265 4<\/td>\r\n2 IT13<\/td>\r\n2 IT14<\/td>\r\n2 IT15<\/td>\r\n<\/tr>\r\n
Tolerance y based on diameter d2<\/sub><\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n
4.5.3 Flatness (Deflection) z<\/div>\r\n

Flatness z is the difference between effective height heff<\/sub> and effective thickness teff<\/sub>. Note: Independent of thickness tolerance; additional processes like grinding may reduce deflection. Measured after deburring.<\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Thickness t<\/th>\r\nProduct Grade<\/th>\r\n<\/tr>\r\n
F<\/th>\r\nA<\/th>\r\nC<\/th>\r\n<\/tr>\r\n
z\r\nmax<\/th>\r\nz\r\nmax<\/th>\r\nz\r\nmax<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
t \u2264 0.5<\/td>\r\n0.07<\/td>\r\n0.1<\/td>\r\n0.13<\/td>\r\n<\/tr>\r\n
0.5 < t \u2264 1<\/td>\r\n0.1<\/td>\r\n0.15<\/td>\r\n0.2<\/td>\r\n<\/tr>\r\n
1 < t \u2264 2.5<\/td>\r\n0.2<\/td>\r\n0.2<\/td>\r\n0.25<\/td>\r\n<\/tr>\r\n
2.5 < t \u2264 4<\/td>\r\n0.3<\/td>\r\n0.3<\/td>\r\n0.3<\/td>\r\n<\/tr>\r\n
4 < t \u2264 6<\/td>\r\n0.4<\/td>\r\n0.4<\/td>\r\n0.4<\/td>\r\n<\/tr>\r\n
6 < t \u2264 10<\/td>\r\n0.6<\/td>\r\n0.6<\/td>\r\n0.6<\/td>\r\n<\/tr>\r\n
10 < t \u2264 20<\/td>\r\n1<\/td>\r\n1<\/td>\r\n1<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\n\r\n
\r\n

5. Key Requirements in GB\/T 3103.3-2020<\/h2>\r\nTolerances must be verified pre-surface treatment. Product standards take precedence if differing. Measurements for thickness and flatness occur post-deburring to ensure accuracy.\r\n\r\n<\/div>\r\n\r\n
\r\n

6. Precision and Error Analysis<\/h2>\r\nErrors may arise from manufacturing processes like stamping, leading to burring or coaxiality issues. Improve accuracy via precise tooling and post-processing. Common errors include ignoring chamfer specs; resolve by adhering to grade-specific tables.\r\n\r\n<\/div>\r\n\r\n
\r\n

7. Impact of GB\/T 3103.3-2020 on Industry<\/h2>\r\nThis standard enhances material research by standardizing tolerances, aids quality control in manufacturing, and supports applications in high-precision sectors like aerospace, where grade A washers ensure reliability.\r\n\r\n<\/div>\r\n\r\n
\r\n

8. Frequently Asked Questions (FAQ)<\/h2>\r\n
\r\n

What is the difference between product grades A, C, and F?<\/h3>\r\nGrade A offers the tightest tolerances for precision applications, C for general use, and F for fine tolerances in specific scenarios, as detailed in the tables.\r\n\r\n<\/div>\r\n
\r\n

When should tolerances be measured?<\/h3>\r\nTolerances apply before surface treatment, with thickness and flatness measured after deburring to avoid inaccuracies from manufacturing artifacts.\r\n\r\n<\/div>\r\n
\r\n

How does this standard compare to ISO 4759-3?<\/h3>\r\nGB\/T 3103.3-2020 is equivalent to ISO 4759-3:2016, ensuring global compatibility for tolerances on flat washers.\r\n\r\n<\/div>\r\n
\r\n

What if product standards differ from this?<\/h3>\r\nProduct-specific standards take precedence, but deviations require technical justification.\r\n\r\n<\/div>\r\n
\r\n

Are chamfers mandatory?<\/h3>\r\nMinimum chamfers are specified to prevent sharp edges, with values based on thickness and grade; for combined washers, position may need specification.\r\n\r\n<\/div>\r\n
\r\n

How to select the appropriate grade for an application?<\/h3>\r\nChoose based on assembly precision: A for high-load critical parts, C for standard bolting, considering factors like vibration and load distribution.\r\n\r\n<\/div>\r\n<\/div>\r\n
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