Are you looking for the best o-ring sizes and dimensions from factories in China? With so many options available, it can be overwhelming to choose the right one. In this article, we’ll compare the top factories, helping you make an informed decision for your specific needs. Let’s dive in

O-Rings | China – Products | Parker NA

OEM O Ring Size Chart Manufacturers and Factory China

Product Details: O-ring size charts provide comprehensive dimensions and tolerances for O-rings, including standard and metric sizes. Standard sizes are defined by Aerospace Standard AS568B, which lists 369 sizes in six series, with cross-sectional diameters ranging from 0.040 to 0.275 inches and inside diameters from 0.029 to 25.940 inches. Metric sizes are defined by ISO 3601-1, grouping sizes into G and A series, with the G series for general purposes and the A series for aerospace applications with tighter tolerances[1][4][5].

Pros:
– Provides precise dimensions and tolerances for accurate selection
– Covers a wide range of standard and metric sizes to fit various applications
– Includes options for custom and non-standard sizes without tooling fees
– Ensures compatibility with international standards and military specifications

Cons:
– Complexity in choosing the right size due to numerous options
– Requires careful consideration of cross-sectional diameter and inside diameter f…
– May need additional resources or expertise to select the correct O-ring size

O-Rings, Rubber Seals – Best China Manufacturer & Supplier

Product Details: Savvy manufactures a wide range of o-rings made from various materials including NBR, FKM (Viton), Silicone, EPDM, HNBR, CR, Aflas, and more. These o-rings are available in standard and custom sizes, with the ability to produce encapsulated o-rings, backup-rings, x-rings, etc. The temperature range for these o-rings varies by material, such as -70°C to 220°C for Silicone. The hardness is typically measured in Shore A, with common hardness levels being 60 to 90. Savvy also offers o-rings in various colors, with the option to customize colors based on RAL or Pantone standards.

Pros:
– Good property and low cost, especially for NBR which makes up about 50% of o-rin…
– FKM (Viton) offers the best comprehensive performance and is widely used in high…
– Silicone o-rings are tasteless, non-toxic, and resistant to high temperatures an…
– Custom o-rings can be made at a very low mold/tooling cost with fast delivery.
– Available in various colors for easy identification.

Cons:
– Low hardness o-rings are prone to peeling, installation damage, extrusion, and p…
– High hardness o-rings can be inconvenient to install.
– Unique or custom colors may increase the cost and require a larger MOQ with a lo…

30-80 Durometer colored elastic large diameter o-rings

Product Details: The 30-80 Durometer colored elastic large diameter o-rings are made from high-quality materials such as Nitrile rubber (NBR), Viton, and Silicone. These o-rings have a hardness range from 30 Shore to 80 Shore Durometer and are available in a wide range of sizes, with inner diameters (ID) from 0.8mm to 572mm and cross-sections from 0.4mm to 17.27mm. They exhibit good elastic and resilient properties, and are resistant to high temperatures, abrasion, and oils. The o-rings are suitable for various applications, including excavators, and are offered in over 1000 existing sizes, eliminating tooling costs.

Pros:
– Made from high-quality, durable rubber
– High temperature resistance
– Abrasion resistant
– Oil resistant
– Available in a variety of commonly used materials (Silicone, Neoprene, Nitrile,…
– Wide range of sizes available (ID: 0.8~572mm, Cross Section: 0.4~17.27mm)
– No tooling costs due to existing sizes

Cons:
– No specific cons mentioned for these o-rings, but general limitations of the mat…

O-ring size (no tooling charge)

Product Details: PPE offers a wide range of O-ring sizes and materials, including AS568, DIN 11864, and RJT O-rings. These O-rings are available in various elastomer materials such as FFKM, FKM, EPDM, and Silicone, with certifications including FDA, USP, and 3-A 18-03. They are manufactured for critical sealing applications in industries like oil & gas, semiconductor, and food processing. Large diameter O-rings up to 2.5 meters outer diameter and cross sections from 5mm to 20mm are also available.

Pros:
– High performance elastomer materials with excellent chemical resistance and high…
– Fully molded O-rings offer tighter cross-section tolerances and no joint weaknes…
– Available in metal detectable elastomers for enhanced consumer safety in food an…
– Manufactured in cleanroom environments to minimize contamination.
– Shortest lead-times in the sealing industry for time-critical requirements.

Cons:
– Jointed O-rings, though not the primary offering, can have inherent weak spots a…
– Custom tooling may be required for non-standard O-ring sizes, which could add to…

Custom O-Rings, Custom Molded O-Ring China Manufacturer

Product Details: Savvy Rubber offers custom o-rings designed and produced to meet specific requirements. These o-rings can be customized in various cross-sections and shapes. For standard cross-sections but non-round shapes (e.g., square, rectangular), a drawing is required for production. Key details include the need for inner diameter (ID) and cross-section (CS) for round custom o-rings, and a drawing for non-round shapes. The materials available include NBR, FKM, Silicone, and others, with various hardness levels (Shore A 40-90) and colors (customizable with RAL or Pantone color numbers). Custom o-rings are used in industries such as hydraulics, oil and gas, semiconductor processing, aerospace, food

processing, and more.

Pros:
– Strong cost control management resulting in low prices while maintaining high qu…
– Ability to produce custom o-rings in various cross-sections and shapes.
– Wide range of materials and hardness levels available.
– Customizable colors based on RAL or Pantone color numbers.
– Experience in the OEM o-ring industry for many years.

Cons:
– Higher price compared to standard o-rings due to lower volume production.
– Requires close communication and cooperation for non-standard shapes.
– Unique colors may increase cost and require a larger MOQ with longer delivery ti…

China O-Ring Kits Suppliers – NNK Oil Seal

Product Details: The Universal Type O-Ring Kit Box 30 size is a professional-quality assortment of O-rings. It includes 382 pieces of O-rings in 30 of the most popular sizes, both in inches and millimeters. The O-rings are made from commercial-grade nitrile butadiene rubber (NBR) and fluoroelastomer (FKM) materials, offering oil, chemical, and high-pressure resistance. The kit is suitable for various applications, including machines and excavators. The O-rings have a hardness range of 60-90 Shore A and can operate in temperatures from -40°C to 260°C. The kit comes in a practical resealable plastic case and is certified with ISO9001/TS16949 standards.

Pros:
– High-quality materials (NBR and FKM) providing excellent oil and chemical resist…
– Wide range of sizes (30 sizes) to fit various applications
– Suitable for high-pressure and harsh conditions
– Durable and long-lasting with UV resistance
– Practical resealable plastic case for storage
– Certified with ISO9001/TS16949 standards ensuring high quality

Cons:
– Limited to specific materials (NBR and FKM), which may not be suitable for all e…
– No mention of availability for custom sizes or special orders beyond the standar…
– May require additional backup rings for elevated operating pressure environments

International Ring Size Conversion Chart: US, Australia, …

Product Details: To measure your ring size, you can use several methods. The most accurate way is to use an adjustable ring sizer, which can be purchased online or requested from some jewelry websites. This sizer typically includes multiple plastic rings of different sizes that you try on until you find the one that fits best. Another method is the string or tape measure technique, where you wrap a string or tape around the base of your finger, mark the overlap, and measure the length to match it with a ring size chart. You can also use a printable ring size chart

and place an existing ring that fits well over the circles to find the matching size[1][3][5].

Pros:
– Accurate measurement with adjustable ring sizers
– Convenient methods such as using a string or existing ring
– Printable ring size charts available for easy reference
– Options for temporary and non-permanent size adjustments like sizing beads and s…

Cons:
– Manual methods may require careful measurement to avoid inaccuracies
– Printable charts need to be printed at the correct scale to ensure accuracy
– Temporary size adjustments may not be as comfortable or durable as permanent res…

Perfluoroelastomer FFKM O ring Manufacturer

Product Details: FFKM O-rings are made of perfluoroelastomer compounds with a higher fluorine content than FKM fluoroelastomers. They are known for their excellent resistance to chemical corrosion, organic and inorganic acids, alkali, ester, ether, ketone, aldehyde, superheated water, and steam. The maximum operating temperature is up to 230°C. These O-rings can be customized into various forms such as O-rings, diaphragms, gaskets, rubber strips, and rubber plates. They are ideal for harsh chemical environments and are used in industries like chemical processing, energy, semiconductors, pharmaceuticals, oil and gas recovery, and aerospace.

Pros:
– Excellent chemical resistance to a wide range of aggressive chemicals, including…
– High temperature stability, with operating temperatures up to 230°C (or up to 60…
– Long service life and low maintenance due to their resistance to degradation and…
– Versatile applications in various industries such as chemical processing, semico…
– High reliability in both dynamic and static applications.

Cons:
– Significantly more costly than standard FKM materials.
– Poor low-temperature performance, with some formulations having limited flexibil…
– May not be suitable for all types of chemicals, such as certain amines at elevat…
– Requires careful selection and testing to ensure compatibility with specific ser…

Ring Size Guide

Product Details: The ring size guide provides methods to determine your ideal ring size. You can measure your ring size using a strip of paper or string, an existing ring, or a printable ring sizer. Wrap a thin strip of paper or string around the base of your finger, mark the overlap, and measure the length in millimeters. Use the provided chart to match your measurement to the corresponding ring size. It is recommended to measure your finger when it is warm and to measure the exact finger you plan to wear the ring on.

Pros:
– Provides multiple methods for measuring ring size, including using paper, string…
– Includes international size conversion charts for accurate sizing across differe…
– Recommendations for ensuring accurate measurements, such as measuring when finge…

Cons:
– Measuring with paper or string can be less accurate than using a professional ri…
– Finger size can vary with temperature, which may affect the accuracy of the meas…

Comparison Table

Frequently Asked Questions (FAQs)

Frequently Asked Questions About O-Ring Sizes and Dimensions in Chinese Factories

What are the standard sizes for o-rings in Chinese factories?

Chinese factories produce o-rings in various standard sizes, including those adhering to AS568 (USA), BS1516 (UK), DIN 3771 (Germany), JIS B 2401 (Japan), ISO 3601 (International), and GB 3452.1 (China). These standards cover a range of inside diameters (ID) and cross-sections (CS) to fit different applications. For example, the AS568 standard includes sizes like 1.78mm, 2.62mm, and 3.53mm for the cross-section.

How do I specify the size of an o-ring?

To specify the size of an o-ring, you typically need to provide the inside diameter (ID) and the cross-section (CS) or width. For instance, a standard o-ring size might be given as ID 20 x CS 2 mm. The outside diameter (OD) can be calculated using the formula: OD = ID + CS * 2. This ensures you get the exact fit for your application.

Can I get custom sizes for o-rings from Chinese factories?

Yes, you can get custom sizes for o-rings from Chinese factories. Many manufacturers, such as Savvy and Hongju Silicone, offer OEM and ODM services that allow you to customize the size, material, and other specifications of your o-rings according to your needs. They can produce o-rings with IDs ranging from 0.3mm to 1500mm and various cross-sections.

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

Chinese factories use a variety of materials for o-rings, including NBR (Nitrile), EPDM, FKM (Viton), HNBR, Silicone, and FFKM (Perfluoroelastomer). Each material has different properties and is suited for different applications, such as chemical resistance, high temperature, or ozone resistance. You can choose the material that best fits your specific needs.

What is the minimum order quantity (MOQ) for o-rings from Chinese factories?

The minimum order quantity (MOQ) for o-rings from Chinese factories can vary but is typically around 100 to 1000 pieces. Some manufacturers may have lower MOQs, such as 50 pieces, while others may require larger orders. It’s always a good idea to check with the specific factory for their MOQ requirements and any associated costs or delivery times.