{"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\/es\/blog\/gb-t-3103-3-2020-flat-washer-tolerances-guide\/","title":{"rendered":"Gu\u00eda de tolerancias para arandelas planas GB\/T 3103.3-2020"},"content":{"rendered":"

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<\/p>\n

Gu\u00eda de tolerancias para arandelas planas GB\/T 3103.3-2020<\/h1>\n
Tolerancias para arandelas planas<\/div>\n

<\/p>\n

\n

1. Introducci\u00f3n<\/h2>\n

Las arandelas planas desempe\u00f1an un papel fundamental en los sistemas de fijaci\u00f3n, ya que distribuyen las cargas, evitan da\u00f1os en la superficie y garantizan la integridad del ensamblaje. La norma GB\/T 3103.3-2020 especifica las tolerancias para arandelas planas con di\u00e1metros nominales de 1 mm a 150 mm, aplicables a los grados de producto A, C y F. Esta norma es esencial para mantener la precisi\u00f3n en las industrias de ingenier\u00eda mec\u00e1nica, automotriz, aeroespacial y de la construcci\u00f3n.<\/p>\n

Basada en la norma ISO 4759-3:2016, esta gu\u00eda garantiza la compatibilidad con las pr\u00e1cticas internacionales, promoviendo el control de calidad y la intercambiabilidad. Detalla las tolerancias para el di\u00e1metro interior, el di\u00e1metro exterior, el espesor, los chaflanes y los atributos de forma y posici\u00f3n, lo que facilita a los ingenieros el dise\u00f1o y la adquisici\u00f3n de componentes.<\/p>\n<\/div>\n

<\/p>\n

\n

2. Descripci\u00f3n general de la norma GB\/T 3103.3-2020<\/h2>\n

Publicada en 2020 por la Administraci\u00f3n de Normalizaci\u00f3n de China, esta norma actualiza las versiones anteriores para adaptarlas a los avances mundiales en tecnolog\u00eda de elementos de fijaci\u00f3n. Se aplica a las arandelas planas utilizadas con pernos, tornillos y tuercas, excluyendo tipos especiales como las arandelas de seguridad.<\/p>\n

El contenido principal incluye tolerancias dimensionales antes del tratamiento superficial, con desviaciones permitidas solo cuando est\u00e9n t\u00e9cnicamente justificadas. Las tolerancias de forma y posici\u00f3n cumplen con las normas GB\/T 1182 y GB\/T 16671.<\/p>\n<\/div>\n

<\/p>\n

\n

3. Principios b\u00e1sicos de las tolerancias de las arandelas planas<\/h2>\n

Las tolerancias garantizan que las arandelas encajen con precisi\u00f3n en los conjuntos, evitando fallos por desalineaci\u00f3n o juego excesivo. Se definen para los grados de producto: A (precisi\u00f3n), C (general) y F (fino). Salvo que se especifique lo contrario, las tolerancias se aplican antes del tratamiento.<\/p>\n

Los par\u00e1metros clave incluyen el di\u00e1metro interior (d1<\/sub>), di\u00e1metro exterior (d2<\/sub>), espesor (t), chaflanes (c1<\/sub>, c2<\/sub>), y tolerancias de forma como la coaxialidad y la planitud.<\/p>\n<\/div>\n

<\/p>\n

\n

4. Especificaciones detalladas de tolerancia<\/h2>\n
4.1 Agujero interior d1<\/sub><\/div>\n

 <\/p>\n

Tolerancias para el orificio interior d1<\/sub> Var\u00edan seg\u00fan el grosor y la calidad del producto.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
Espesor<\/th>\nTolerancias<\/th>\n<\/tr>\n
Grado del producto<\/th>\n<\/tr>\n
F<\/th>\nA<\/th>\ndo<\/th>\n<\/tr>\n<\/thead>\n
t < 2
\n2 \u2264 t < 4
\nt \u2265 4<\/td>\n		d1<\/sub>
\nTolerancia<\/td>\n		el1<\/sub>
\nm\u00edn.<\/td>\n		e1<\/sub>
\nm\u00e1ximo<\/td>\n		d1<\/sub>
\nTolerancia<\/td>\n		el1<\/sub>
\nm\u00edn.<\/td>\n		e1<\/sub>
\nm\u00e1ximo<\/td>\n		d1<\/sub>
\nTolerancia<\/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
El rebaba no est\u00e1 definido pero est\u00e1 permitida.<\/td>\nBanda de l\u00e1grima (e1<\/sub>), t1<\/sub> y el rebaba no est\u00e1 definido pero est\u00e1 permitido<\/td>\n<\/tr>\n
el1<\/sub> es la porci\u00f3n del agujero dentro de la tolerancia especificada de d1<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
4.2 Di\u00e1metro exterior d2<\/sub><\/div>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
Espesor<\/th>\nTolerancias<\/th>\n<\/tr>\n
Grado del producto<\/th>\n<\/tr>\n
F<\/th>\nA<\/th>\ndo<\/th>\n<\/tr>\n<\/thead>\n
t < 2
\n2 \u2264 t < 4
\nt \u2265 4<\/td>\n		d2<\/sub>
\nTolerancia<\/td>\n		e2<\/sub>
\nm\u00e1ximo<\/td>\n		d2<\/sub>
\nTolerancia<\/td>\n		e2<\/sub>
\nm\u00e1ximo<\/td>\n		d2<\/sub>
\nTolerancia<\/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
Desgaste y t2<\/sub> no definido pero permitido<\/td>\nBanda de l\u00e1grima (e2<\/sub>), t2<\/sub> y el rebaba no est\u00e1 definido pero est\u00e1 permitido<\/td>\n<\/tr>\n
el2<\/sub> es la porci\u00f3n del di\u00e1metro exterior dentro de la tolerancia especificada de d2<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
4.3 Espesor t<\/div>\n

Tolerancias de espesor medidas despu\u00e9s del desbarbado.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
Espesor t<\/th>\nGrado del producto<\/th>\n<\/tr>\n
F<\/th>\nA<\/th>\ndo<\/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 Chaflanes<\/div>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n
Espesor nominal<\/th>\nGrado del producto<\/th>\n<\/tr>\n
F<\/th>\nA<\/th>\ndo<\/th>\n<\/tr>\n
c1<\/sub>
\nm\u00edn.<\/th>\n		c2<\/sub>
\nm\u00edn.<\/th>\n		c1<\/sub>
\nm\u00edn.<\/th>\n		c2<\/sub>
\nm\u00edn.<\/th>\n		c1<\/sub>
\nm\u00edn.<\/th>\n		c2<\/sub>
\nm\u00edn.<\/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 Requisitos suplementarios para arandelas combinadas<\/div>\n

A petici\u00f3n del comprador, se deber\u00e1 especificar en el pedido la posici\u00f3n del chafl\u00e1n en relaci\u00f3n con las desviaciones del estampado.<\/p>\n

4.5 Tolerancias de forma y posici\u00f3n<\/div>\n

\u0394t se aplica fuera de x = 0.1 (d2<\/sub> - d1<\/sub>), es decir, 60% de ancho de anillo.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Espesor t<\/th>\nGrado del producto<\/th>\n<\/tr>\n
F<\/th>\nA<\/th>\ndo<\/th>\n<\/tr>\n
\u0394t
\nm\u00e1ximo<\/th>\n		\u0394t
\nm\u00e1ximo<\/th>\n		<\/th>\n<\/tr>\n<\/thead>\n
t \u2264 0,5<\/td>\n0.02<\/td>\n0.025<\/td>\nNo se requiere<\/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 Coaxialidad y<\/div>\n\n\n\n\n\n\n\n\n\n\n
Espesor t<\/th>\nGrado del producto<\/th>\n<\/tr>\n
F<\/th>\nA<\/th>\ndo<\/th>\n<\/tr>\n
y
\nm\u00e1ximo<\/th>\n		y
\nm\u00e1ximo<\/th>\n		y
\nm\u00e1ximo<\/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
Tolerancia y basada en el di\u00e1metro d2<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
4.5.3 Planitud (Deflexi\u00f3n) z<\/div>\n

La planitud z es la diferencia entre la altura efectiva hefectivo<\/sub> y espesor efectivo tefectivo<\/sub>Nota: Independiente de la tolerancia de espesor; procesos adicionales como el rectificado pueden reducir la deflexi\u00f3n. Medido despu\u00e9s del desbarbado.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Espesor t<\/th>\nGrado del producto<\/th>\n<\/tr>\n
F<\/th>\nA<\/th>\ndo<\/th>\n<\/tr>\n
z
\nm\u00e1ximo<\/th>\n		z
\nm\u00e1ximo<\/th>\n		z
\nm\u00e1ximo<\/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. Requisitos clave en GB\/T 3103.3-2020<\/h2>\n

Las tolerancias deben verificarse antes del tratamiento superficial. En caso de discrepancia, prevalecer\u00e1n las normas del producto. Las mediciones de espesor y planitud se realizan despu\u00e9s del desbarbado para garantizar la precisi\u00f3n.<\/p>\n<\/div>\n

<\/p>\n

\n

6. Precisi\u00f3n y an\u00e1lisis de errores<\/h2>\n

Pueden surgir errores durante los procesos de fabricaci\u00f3n, como el estampado, lo que puede provocar rebabas o problemas de coaxialidad. Mejore la precisi\u00f3n mediante herramientas precisas y un procesamiento posterior adecuado. Entre los errores comunes se incluye ignorar las especificaciones del chafl\u00e1n; para solucionarlos, siga las tablas espec\u00edficas para cada grado.<\/p>\n<\/div>\n

<\/p>\n

\n

7. Impacto de la norma GB\/T 3103.3-2020 en la industria<\/h2>\n

Esta norma mejora la investigaci\u00f3n de materiales al estandarizar las tolerancias, ayuda al control de calidad en la fabricaci\u00f3n y respalda las aplicaciones en sectores de alta precisi\u00f3n como el aeroespacial, donde las arandelas de grado A garantizan la fiabilidad.<\/p>\n<\/div>\n

<\/p>\n

\n

8. Preguntas frecuentes (FAQ)<\/h2>\n
\n

\u00bfCu\u00e1l es la diferencia entre los grados de producto A, C y F?<\/h3>\n

La categor\u00eda A ofrece las tolerancias m\u00e1s estrictas para aplicaciones de precisi\u00f3n, la categor\u00eda C para uso general y la categor\u00eda F para tolerancias finas en escenarios espec\u00edficos, como se detalla en las tablas.<\/p>\n<\/div>\n

\n

\u00bfCu\u00e1ndo deben medirse las tolerancias?<\/h3>\n

Se aplican tolerancias antes del tratamiento superficial, y el espesor y la planitud se miden despu\u00e9s del desbarbado para evitar imprecisiones derivadas de defectos de fabricaci\u00f3n.<\/p>\n<\/div>\n

\n

\u00bfC\u00f3mo se compara esta norma con la ISO 4759-3?<\/h3>\n

La norma GB\/T 3103.3-2020 es equivalente a la ISO 4759-3:2016, lo que garantiza la compatibilidad global en cuanto a tolerancias para arandelas planas.<\/p>\n<\/div>\n

\n

\u00bfQu\u00e9 ocurre si los est\u00e1ndares del producto difieren de esto?<\/h3>\n

Las normas espec\u00edficas del producto tienen prioridad, pero las desviaciones requieren justificaci\u00f3n t\u00e9cnica.<\/p>\n<\/div>\n

\n

\u00bfSon obligatorios los chaflanes?<\/h3>\n

Se especifican chaflanes m\u00ednimos para evitar bordes afilados, con valores basados \u200b\u200ben el espesor y el grado; para arandelas combinadas, puede ser necesario especificar la posici\u00f3n.<\/p>\n<\/div>\n

\n

\u00bfC\u00f3mo seleccionar el grado apropiado para una solicitud?<\/h3>\n

Elija en funci\u00f3n de la precisi\u00f3n de montaje: A para piezas cr\u00edticas sometidas a altas cargas, C para atornillado est\u00e1ndar, teniendo en cuenta factores como la vibraci\u00f3n y la distribuci\u00f3n de la carga.<\/p>\n<\/div>\n<\/div>\n

<\/div>\n

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

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GB\/T 3103.3-2020 Flat Washer Tolerances Guide Tolerances for Flat Washers 1. Introduction Flat 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, […]<\/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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