O-Ring Types and O-Ring Material Makeup - A Guide
One type of O-ring material. Image credit: krolya25/Shutterstock.com. O-rings are a form of gasket or seal that features a round cross-section. They are commonly used to prevent leaks of either fluids or gases from occurring in products, systems, or machinery and …
Viton vs Nitrile o-Rings: What Are The Differences? | NES
Nitrile o-rings. Also called NBR or Buna-N, nitrile o rings are probably the most economical and widely used elastomer out there. This material has a desirable set of properties including low compression set, high resistance to abrasion and good tensile strength. Temperature range: Effective from -40°C to 120°C.
AS-568 Standard O-Rings
material hardness and selection. D. Permeability: important for pneumatic and vacuum applications. 4. Medical applications: make sure an Apple representative is aware if medical grade materails are required. Apple O-Rings are available in a choice of six basic materials, each in a range of optional durometer (Shore A) hardnesses. Other ...
What is Durometer? – Elastomer and Plastic Hardness | ISM
Durometer or Shore durometer is a standardized way to measure the hardness of materials like rubber (elastomers) and plastics. Durometer measurement scales range from 0 to 100 but there is no such thing as a durometer unit of measurement. Another way of saying this is that durometer is a …
Troubleshooting O-Ring Failures | Phelps Industrial Products
B. Troubleshooting. Replacing the O-ring to a better quality one. Using a O-ring with more hardness. At Phelps, we offer a wide range of Metric as well as American standard sized O-Rings in various materials. Please call our sealing experts @ 1-800-876-SEAL with you questions and fluid sealing requirements.
Durometer O-Ring Hardness Kits - M&L Test
The Digital Complete O-Ring Hardness Kit is the most convenient and accurate way to perform repeatable hardness (durometer) testing on thin materials - as thin as .050". Features: Model DD-4-M - Type M Durometer with Certification. Model OS-3 - Air Dampened Operating Stand. Model ORF-1 - O-Ring …
O-Ring Size Chart : The O-Ring Store LLC, We make getting ...
The O-Ring Store LLC : O-Ring Size Chart - O-Ring Cord Stock OSK™ Assorted O-Ring Kits OSK™ O-Ring Repair Kits OSK™ Hydraulic Seal Kits OSK™ Air Nailer O-Ring Kits O-Ring Lube O-Ring Tools AS568 O-Rings (Inch) Metric O-Rings (mm) OSK Pool, Spa & Pump O-rings Hydraulic Seals - Inch O-Ring Glue & Thread Sealant Vulcanized O-Rings O-Ring Splice Kits & Tools Hydraulic Seals - Metric …
Basic Properties of Elastomers | O-Ring
Sealing know-how makes the difference. ERIKS is your reliable partner with 80 years of experience in sealing technology. Our O-ring and sealing knowledge is made accessible to you in the below table of chemical and physica elastomerl properties.
Technical Handbook O-rings 6. Compound Selection
STANDARD ERIKS COMPOUNDS (VULC-O-RINGS) Elastomer Hardness Application Shore A ±5 Silicone 75 75 For extremely high or low temperature range, air, oxygen, dry heat, ozone, hot water FDA red to 302 °F (150 °C), and glycol based brake fluids. Resistant to hydraulic fluids but 714006, 714206 is not resistant to many hydraulic fluid additives. ...
O-Rings | Parker
O-Rings. O-rings are circular sealing elements with circular cross-sections, and are mainly used in static applications. The sizes are specified by the inside diameter and the cross section diameter. Our O-rings are manufactured according to metric and imperial international standards such as …
O-Ring Durometer Chart
O-Ring Durometer Chart. The hardness of rubber o-ring compounds are measured by the Shore A durometer; the higher the durometer, the harder the compound. 70-durometer hardness should be used whenever possible as it offers the best combination of properties for most o-ring applications. Durometer Shore A scale is a type of measurement for rubber ...
O-ring test method | Rubber Technology
A O-ring test method can give answers to which O-ring should be used in a certain condition. O-ring test method based on international norms . With the O-ring test method ERIKS is capable to measure hardness based on different international norms like: Hardness; Compression Set; Tensile Strength; Chemical and Heat ageing; Ozone Resistance ...
ERIKS - Technical Manual - O-Ring Gland Design Information
• Select a different O-ring hardness. • Select a different O-ring material with improved coefficient of friction. • Increase the groove depth. • Consider the use of an alternate design of seal. • Viton® has much lower friction than NBR or EPDM or Silicone. • Check to ensure squeeze is …
The Importance of Shore A Hardness
The hardness of rubber O-rings are measure by the Shore A durometer; the higher the durometer, the harder the compound. In general, 70-durometer hardness should be used whenever possible, as it offers the best combination of properties for most o-ring applications.
What is the durometer of an O-Ring? | Rocket Seals, Inc.
O-Rings are available in almost all durometers, with 70 or 90 durometer, the most common in most compounds. Softer sealing materials, with lower hardness readings, will more easily flow into the microfine grooves and imperfections of the mating parts, but softer compounds, like 50 durometer compounds, wear and extrude very quickly.
A Guide to Shore Hardness and Why ... - O-Rings Manufacturer
What is an O - Ring ? (with pictures) - wiseGEEK
O-ring hardness kit. - Free Online Library
The company's complete o-ring hardness kit is said to provide the most convenient and accurate way to perform repeatable hardness (durometer) testing on very thin materials, such as o-rings. The Type M durometer is capable of testing materials as thin as .050", whereas a standard durometer requires a minimum thickness of .250", according to the ...
Overview of Hyperelastic FEA of an O-Ring – Tarkka
You could use Figures 2-4 through 2-8 in the Parker O-Ring Handbook to determine the compression force per unit length for your particular cross section, hardness, and squeeze, and then just apply this force to each of the components directly.
How to chose O-Ring material for your fluid sealing ...
Complete O-ring material compatibility for various applications can be found here. Seal material: Alfas®. Hardness (Shore A): 60 -90. Standard Colour: Black. Working temperature: -14° to +446°F (Standard Compound) Key uses: Used in seals for aerospace, oil related seals. Commonly used in …
Rubber Hardness IRHD and Shore | Goodyear Rubber
RUBBER HARDNESS. Elastomeric materials are usually measured with either a Shore A Scale Durometer or an IRHD dead load system. These tests are designed for use with samples approx 6mm thick, and a surface area sufficient to permit at least 3 test points 5mm apart, 13mm from any edge.
O-Rings? O-yeah! How to Select, Design, and Install O-Ring ...
O-rings are the epitome of elegant engineering: The ring itself costs only a few cents, and the groove it goes in is simple and easy to manufacture. ... The hardness is typically expressed as the Durometer Hardness. 70 is a fairly typical hardness and is good for most uses. 55 Durometer is much softer, and is a good choice for pressures below ...
Parker O-Ring Handbook
on O-ring drive belts and their application will be found in O-Ring Applications, Section III. 1.2 What is an O-Ring Seal? An O-ring seal is used to prevent the loss of a fluid or gas. The seal assembly consists of an elastomer O-ring and a gland. An O-ring is a circular cross-section ring molded from rubber (Figure 1 …
Technical Handbook O-rings 5. Designing with Rubber
Technical Handbook O-rings O-ring Hardness The hardness of an O-ring is important for several reasons. The softer the elastomer, the better the seal material conforms to the surfaces to be sealed and lower pressure is required to create a seal. This is particularly important in low pressure seals that are not activated by fluid pressure.
Hardness - Parker Hannifin Corporation
In the O-ring industry, another hardness scale is used due to the curved surface of the O-ring cross-section causing problems with accurately reading Shore A. The scale is IRHD (International Rubber Hardness Degrees). The size and shape of the indentor used in IRHD readings is much smaller, thus allowing for more accurate measurements on curved ...
O-Ring Durometer Testing Kit - OTK-AN
The Analog Complete O-Ring Hardness Kit is the most convenient and accurate way to perform repeatable hardness (durometer) testing on thin materials - as thin as .030"*. The OTK-AN is comprised of the following items: Model RX-1600-M - Type M Analog Durometer with Certification ORF-1 - O-Ring Fixture Kit (1/16, 3/32, 1/8, 3/16, 1/4)
Cherry MX Rubber O-Ring Switch Dampeners 60A Hardness ...
Tell a Friend. Cherry MX Rubber O-Ring Switch Dampeners 60A Hardness (130pcs) Model : Cherry MX Rubber O-Ring. Color : Blue. Hardness : 60A. Thickness : 1.5mm. Quantity : 130 pcs. The term "Bottoming out" is commonly used to describe when a key stroke is pressed all the way down where the stem of the switch hits the inside of the switch casing.
O-ring seals and grooves - Pfeiffer Vacuum
To compress an O-ring of 5.33 mm thickness by 20 %, approx 5 N per mm of sealing length is required for a hardness of 70 Shore A resp. 7 N/mm for 80 Shore A. To facilitate assembly, the diameter of the O-ring groove is usually selected somewhat larger than the diameter of the O-ring. This keeps the O-ring in the groove during assembly.
Shore A Hardness / What is a Shore A Hardness and why is ...
The Shore A hardness measurement is called ''durometer''. Tests are carried out on cured rubber according to ASTM D2240, and on a complete O Ring according to ASTM D1414. Durometer instrument comprises of a toughened steel rod with a bevelled cone at the tip. The steel rod is spring-loaded and activates a gauge with a scale between 1 ...
Shore durometer - Wikipedia
Two inline skate wheels with different durometer – 85A and 83A. The Shore durometer is a device for measuring the hardness of a material, typically of polymers, elastomers, and rubbers. Higher numbers on the scale indicate a greater resistance to indentation and thus harder materials. Lower numbers indicate less resistance and softer materials.
A comprehensive guide to O-Rings? : MechanicalKeyboards
50A means a material hardness of 50 on the Shore durometer A scale. R is the size. According to the WASD site, R reduces key actuation travel by 0.4mm and L reduces by 0.2mm; this means thats how thick these rings are. However, I measured the o-ring and dampener in regards to this question and realized that R = 0.4 cm = 4 mm and L = 0.2 cm = 2 mm.