Are you looking for the best o-ring manufacturers in China? With so many options available, choosing the right one can be overwhelming. In this article, we’ll compare the top o-ring measurement factories in China, highlighting their strengths, product ranges, and what sets them apart. Let’s dive in and find the perfect fit for your needs.

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

Product Details: Savvy manufactures a wide range of o-rings made from various materials including rubber, metal, and other materials. The most commonly used o-ring materials are NBR, FKM (Viton), and Silicone. NBR is widely used due to its good properties and low cost. FKM/Viton offers the best comprehensive performance and is used in high-standard sealing equipment. Silicone is often used in medical and food industries due to its high-temperature resistance, tastelessness, and non-toxicity. Other materials include EPDM, HNBR, CR, and Aflas. O-rings are available in various hardness levels, typically measured in Shore A units, ranging from 40 to 90, with 60-70 being

the most common. They also come in different colors and can be customized to specific RAL or Pantone color numbers.

Pros:
– High-temperature resistance: Silicone o-rings can operate from -70°C to 220°C.
– Good chemical resistance: Different elastomers have varying compatibility with c…
– Wide range of materials: Available in NBR, FKM/Viton, Silicone, EPDM, HNBR, CR,…
– Customizable: Can be made in various sizes, shapes, and colors.
– Low mold/tooling cost: Fast delivery and low costs for custom o-rings.

Cons:
– Hardness trade-offs: Low hardness makes installation easy but prone to peeling a…
– Material limitations: Each material has specific limitations, such as NBR’s limi…
– Color and MOQ constraints: Unique colors may increase cost and require a larger…

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

Product Details: The French R O-Ring series includes a wide range of O-Rings measured by their inside diameter (ID) and cross-section width (C.S.) in millimeters. The series encompasses various sizes, such as R000 with an ID of 1.15mm and C.S. of 0.13mm, to larger sizes like R75. Each O-Ring has specific dimensions, for example, R5B has an ID of 6.35mm and a C.S. of 0.16mm. The O-Rings are categorized into different sub-series (e.g., R0, R1, R2, etc.) with varying ID and C.S. dimensions[1].

Pros:
– Wide range of sizes available to fit various applications
– Precise measurements in millimeters for accurate fitting
– Diverse sub-series to cater to different needs

Cons:
– Complexity in selecting the correct size due to numerous options
– No specific information on material compatibility or physical properties on this…

O-ring size (no tooling charge)

Product Details: Precision Polymer Engineering (PPE) offers a wide range of O-ring sizes and types, including AS 568, DIN 11864, and RJT O-rings. These O-rings are available in various materials such as FFKM, FKM, EPDM, and Silicone, with certifications including FDA, USP, and 3-A 18-03. The O-rings can be fully molded, ensuring tighter cross-section tolerances and no joint weaknesses. They are used in critical applications like compressors, valves, oil & gas equipment, and semiconductor manufacturing.

Pros:
– Fully molded O-rings eliminate joint weaknesses, reducing the risk of premature…
– Tighter cross-section tolerances ensure a proper fit in critical equipment.
– Available in high-performance elastomer grades with excellent chemical resistanc…
– Metal detectable elastomers are available for enhanced consumer safety.
– Manufactured in cleanroom environments to minimize contamination.

Cons:
– Jointed O-rings, though available, may have inherent weak spots at the joints.
– Spliced O-rings can have mismatched joints and wider tolerances on the cross sec…
– Lower density jointed O-rings may have reduced compression set resistance and li…

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, 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, grouped into G and A series for general and aerospace applications, respectively. Key dimensions include inside diameter (ID), cross-sectional diameter (CS), and outside diameter (OD), which are crucial for selecting the right O-ring for a specific application.

Pros:
– Provides precise dimensions and tolerances for accurate selection
– Covers a wide range of standard and metric sizes
– Ensures compatibility with various international standards
– Offers custom and non-standard sizes for unique applications

Cons:
– Complexity in choosing the right size without proper understanding of dimensions
– Tight tolerances in aerospace applications may require specialized knowledge
– Potential for confusion between different regional and international standards

30-80 Durometer colored elastic large diameter o-rings

Product Details: The 30-80 Durometer colored elastic large diameter O-rings are manufactured by Melon Rubber&Plastics in China. These O-rings are made from high-quality materials including Nitrile rubber (NBR), Viton, and Silicone. They 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. The O-rings exhibit good elastic and resilient properties, and they are resistant to high temperatures, abrasion, and oils. They are suitable for various applications, including use in excavators, and comply with multiple standards such as AS 568, BS 4518, and GB/T 3452.1.

Pros:
– Made from high-quality, durable rubber materials
– Wide range of sizes available (ID: 0.8~572mm, Cross Section: 0.4~17.27mm)
– High temperature resistance
– Abrasion and oil resistance
– Compliant with multiple international standards (AS 568, BS 4518, GB/T 3452.1)
– No tooling costs due to existing size availability
– Variety of materials available (NBR, Viton, Silicone, EPDM, etc.)

Cons:
– No specific information on the minimum order quantity (MOQ) or lead time provide…
– No detailed pricing structure beyond the range of US $0.1-10 per piece
– Limited information on the warranty or after-sales support

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

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, made from materials such as NBR70 and FKM75. The kit is housed in a practical resealable plastic case. The O-rings are colored in black, brown, red, and clear, with a hardness range of 60-90 Shore A. They are resistant to oil, chemicals, and high pressure, and can operate in temperatures from -40°C to 260°C. The kit is suitable for applications in machines and excavators and meets ASTM D 2000 standards. It also holds

ISO9001/TS16949 certification.

Pros:
– High-quality materials (NBR70 and FKM75) for durability and resistance to oil, c…
– Wide temperature range (-40°C to 260°C) for various operating conditions.
– Practical resealable plastic case for easy storage and organization.
– Meets ASTM D 2000 and ISO9001/TS16949 standards for reliability.
– Suitable for both home and professional use.
– Thick-walled construction for maximum protection and long-term durability.

Cons:
– Limited to specific sizes and materials, which might not cover all possible appl…
– No mention of specific warranty or long-term performance guarantees.
– Custom sizes and materials may require additional contact and potentially longer…

Rubber o-ring sizes

Product Details: Rubber O-rings are available in a wide range of sizes. The internal diameter (ID) can range from 0.5 mm to 2000.00 mm, and the cross-section (CS) diameter can range from 0.3 mm to 15.00 mm. The standard sizes follow the American AS568 series. These O-rings are made from various materials including Nitrile (NBR), EPDM, VITON, and others, catering to different application requirements.

Pros:
– Wide range of sizes available to fit various applications.
– Made from multiple materials to suit different needs such as Nitrile, EPDM, VITO…
– Standard sizes conform to the AS568 series, ensuring compatibility and reliabili…

Cons:
– No specific information on the website regarding the durability or lifespan of t…
– No detailed technical specifications or performance data provided on the webpage…

Ring Size Conversion Chart – International – Après Jewelry

Product Details: The International Ring Size Conversion Chart on Apres Jewelry’s website provides a comprehensive guide to convert ring sizes between different countries. It includes measurements in millimeters and inches, and corresponds to ring sizes in the USA/Canada/Mexico, UK/Ireland/Australia/New Zealand/South Africa, and Germany/France. The chart helps customers accurately determine their ring size by matching the internal diameter of the ring to the corresponding size in their region.

Pros:
– Accurate size conversion: The chart provides precise measurements to ensure the…
– Comprehensive coverage: It includes size conversions for multiple regions, makin…
– Convenient: Customers can easily match their ring’s internal diameter to the cor…

Cons:
– No automated tool: Customers need to manually look up their size on the chart.
– No additional measurement tips: Unlike some other resources, it does not provide…

Metric Rubber O Ring Sizes

Product Details: Metric o-rings are defined by International Standard ISO 3601-1:2002 and are grouped into two series: G and A. The G series is used for general purpose applications and includes a wide range of inside diameters, while the A series is used for aerospace applications with tighter tolerances. Key dimensions include inside diameter (ID), outside diameter (OD), and cross-sectional diameter (CS). These o-rings are available in hundreds of sizes and can be customized without tooling fees.

Pros:
– Wide range of sizes available, including standard and non-standard options.
– Custom o-rings can be produced within a few weeks without tooling fees.
– Better resistance to compression set and less volume swell in fluids with larger…
– Smaller cross-sectional diameters offer better physical properties and resistanc…

Cons:
– O-rings with smaller cross-sectional diameters may slide and roll in a groove, l…
– Parts with looser tolerances or less rigid components may require larger cross-s…

Comparison Table

Frequently Asked Questions (FAQs)

What are the standard sizes for o-rings available in China?

In China, o-ring manufacturers follow various international and local standards for sizing. These include AS568 for the USA, BS1516 for the UK, DIN 3771 for Germany, JIS B 2401 for Japan, ISO 3601 for international standards, and GB 3452.1 for China. Standard sizes are defined by the inside diameter (ID), outside diameter (OD), and cross-section (CS) of the o-ring. For example, a standard o-ring size might be specified as ID 20 x CS 2 mm.

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

To specify the size of an o-ring, you typically need to provide the inside diameter (ID) and the cross-section (CS) or width. The outside diameter (OD) can be calculated using the formula: OD = ID + CS * 2. For instance, if the ID is 20 mm and the CS is 2 mm, the OD would be 24 mm. Custom sizes are also available if the standard sizes do not meet your requirements.

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

Chinese o-ring manufacturers use a variety of materials to cater to different applications. Common materials include Nitrile (NBR), Fluorinated Rubber (FKM), Ethylene Propylene Diene Monomer (EPDM), Silicone, and Fluorinated Fluoroelastomer (FFKM). Each material has its own properties and is suited for specific uses, such as NBR for general-purpose sealing, FKM for high-temperature and chemical resistance, and Silicone for high-temperature and flexible applications.

Can I get custom o-rings made in China, and what is the process?

Yes, you can get custom o-rings made in China. Custom o-rings can be defined by non-standard cross-sections or irregular shapes. To order custom o-rings, you need to provide the inner diameter (ID) and cross-section (CS) if it’s a standard shape, or a detailed drawing if it’s an irregular shape. Manufacturers like Savvy Rubber can design and produce these custom o-rings based on your specifications, although the process may involve more communication and higher costs compared to standard o-rings.

What is the typical hardness range for o-rings, and why is it important?

The hardness of o-rings is typically measured in Shore A units, ranging from 40 to 90. The most commonly used hardness is around 70, although it can vary depending on the application. For example, silicone o-rings often use Shore A 60, while high-pressure applications might require o-rings with a hardness of 85-90. The hardness is crucial because it affects the ease