Are you looking for the best factories in China to source your standard o-ring sizes? With numerous manufacturers offering a wide range of o-ring products, it can be overwhelming to choose the right one. In this article, we’ll compare some of the top o-ring factories in China, helping you make an informed decision for your sealing needs. Let’s dive in and find out which ones stand out from the rest.

Ring Size Conversion Chart – International – Après Jewelry

O-Ring Sizes – AS568 Standard

Product Details: The AS568 standard, developed by the Society of Automotive Engineers (SAE), defines a set of standardized O-ring sizes. It includes 369 O-ring sizes identified by unique ‘dash numbers’ based on their inside diameter (ID) and cross-section diameter (CS). The sizes range from 0.029 inches to 26 inches in inside diameter, with cross-sections ranging from 0.04 inch to 0.275 inch. The standard specifies tolerances, size identification, and dimensions for O-rings used in various sealing applications[1][3][5].

Pros:
– Provides a common language for specifying O-ring sizes globally, enhancing commu…
– Improves the efficiency and quality of O-ring production by standardizing sizes…
– Facilitates easier specification and ordering of O-rings by using standardized d…

Cons:
– The complexity of the standard can be overwhelming for those not familiar with O…
– The need to refer to detailed charts and guides to ensure the correct size and m…

O-ring size (no tooling charge)

International Ring Size Conversion Chart: US, Australia, …

Product Details: The ring sizer is a tool designed to help measure and determine the correct ring size. It is available in various forms, including adjustable ring sizers, printable DIY ring size charts, and multi-ring sizers. These tools measure the circumference or diameter of the finger to match the ring size, often ranging from US size 3 to 15, including half and quarter sizes.

Pros:
– Provides accurate measurement of ring size from the comfort of home.
– Available in different types, such as adjustable ring sizers and printable chart…
– Helps in selecting the right ring size, reducing the need for resizing.
– Some ring sizers are complimentary or low-cost, making them an affordable option…

Cons:
– Requires careful handling and accurate measurement to avoid incorrect sizing.
– Printable DIY charts may not be as precise as physical ring sizers if not printe…
– May not account for variations in finger size due to weather or time of day.
– Some methods, like using string, can be less accurate than using a dedicated rin…

Rubber o-ring sizes

Product Details: Rubber O-rings are available in a wide range of sizes. The internal diameter (ID) ranges from 0.5 mm to 2000.00 mm, and the cross-sectional diameter (CS) ranges from 0.3 mm to 15.00 mm. The products adhere to the American standard AS568 series, which is one of the most commonly used standards in the industry.

Pros:
– Wide range of sizes available to fit various applications.
– Adheres to the American standard AS568 series, ensuring compatibility and reliab…
– Can be produced in different materials to meet diverse needs.

Cons:
– No specific information on the website regarding the pros and cons, so cons are…
– The website does not provide detailed information on the materials, chemical com…

China O-ring GB Standards English PDF List

French R O-Rings, AS 568A O-Rings, JIS …

Product Details: French R O-Rings are measured by their inside diameter (ID) and cross-section width (C.S.) in millimeters. The series includes a wide range of sizes, from O-Ring R000 with an ID of 1.15mm and C.S. of 0.13mm to O-Ring R75 with larger dimensions. Each O-Ring is specified with precise ID and C.S. measurements, ensuring accurate selection for various applications. These O-Rings are used in diverse industries due to their precise dimensions and reliable sealing properties[2].

Pros:
– Precise dimensions in millimeters for accurate selection
– Wide range of sizes available to suit various applications
– Reliable sealing properties
– Easy to use in both static and dynamic applications

Cons:
– Requires careful selection to match specific ID and C.S. requirements
– No maintenance or adjustment instructions provided on the webpage
– Limited information on chemical compatibility and physical properties on this sp…

Parker AS568 O-Rings Size Chart

Product Details: Parker O-rings are circular sealing elements with a circular cross-section, primarily used in static applications. They are available in various materials such as Fluorocarbon (FKM), Nitrile (NBR), Ethylene Propylene (EPDM), Silicone (VMQ), and more. These materials offer different properties like high temperature resistance, chemical resistance, and compatibility with various fluids and gases. Parker O-rings are manufactured to exacting standards, ensuring material consistency and dimensional control through a Controlled Batch Identification (CBI) program and state-of-the-art technology[2][3][4].

Pros:
– Wide range of materials to suit different applications and environments.
– High chemical and thermal resistance depending on the material chosen.
– Ease of service, no smearing or retightening required.
– Cost-effective and lightweight.
– Gradual failure mode that is easily identified.
– Compatible with various industries including automotive, aerospace, and semicond…

Cons:
– Material selection can be complex and requires careful consideration of the appl…
– Some materials may have poor short-term rebound or low permeability rates.
– Certain materials may not be suitable for low-temperature applications or have l…

danco o ring size chart Manufacturers and Factory China

O-Ring Size Chart for U.S. & Metric Standard Sizes

Product Details: The website provides o-ring size charts for various standards, including U.S., Japanese JIS, British BS, and Common Metric sizing. It offers charts for o-rings, quad-rings, x-rings, and square-rings. Users can view these charts online or download them as PDFs. The site also mentions the availability of custom and non-standard products with no tooling or setup fees.

Pros:
– Comprehensive size charts for different international standards
– Availability of custom and non-standard o-ring sizes without additional tooling…
– Option to view charts online or download as PDFs
– Includes various types of seals such as o-rings, quad-rings, x-rings, and square…

Cons:
– No specific details on material options or pricing provided on the index page
– Users need to navigate to separate pages for detailed information on each type o…

Comparison Table

Frequently Asked Questions (FAQs)

Frequently Asked Questions About Standard O-Ring Sizes in Chinese Factories

What are the common materials used for o-rings in Chinese factories?

Chinese factories commonly produce o-rings from materials such as NBR (Nitrile), FKM (Viton), Silicone, EPDM, HNBR, and FFKM. Each material has its own unique properties and is chosen based on the specific application and working conditions. For example, NBR is widely used due to its good properties and low cost, while FKM is known for its excellent comprehensive performance and high standards.

How are o-ring sizes specified?

O-ring sizes are typically specified using three dimensions: the inside diameter (ID), outside diameter (OD), and the cross-section (CS) or width. You usually only need to specify the ID and CS, as the OD can be calculated using the formula: OD = ID + CS * 2. Standard sizes follow various international standards such as AS568 for the USA, BS1516 for the UK, and ISO 3601 for international use.

What is the significance of o-ring hardness?

The hardness of an o-ring is crucial and is measured in Shore A units. Generally, o-rings range from Shore A 40 to 90, with Shore A 70 being the most commonly used. Hardness affects the ease of installation and the o-ring’s performance. Softer o-rings are easier to install but may be prone to damage, while harder o-rings are more durable but harder to install.

Can Chinese factories produce custom o-ring sizes and materials?

Yes, many Chinese factories offer customization options for o-ring sizes and materials. If you need a non-standard size, the factory will typically need to create a custom mold before production. This process can take longer than ordering standard sizes but allows for precise tailoring to your specific needs. Custom materials and colors are also available, although they may require a larger minimum order quantity and longer delivery times.

What are the typical applications of o-rings produced in Chinese factories?

O-rings produced in Chinese factories are used in a wide range of industries, including automotive, mechanical equipment, construction machinery, aerospace, and more. They are applied in various sealing roles such as engine seals, transmission seals, hydraulic seals, and other critical sealing applications where reliability and performance are essential. The choice of material and size depends on the specific application and the environmental conditions in which the o-ring will operate.