Measuring specialty seals is something that requires a lot of precision and accuracy. Getting the best measurements possible is required for a perfect fit; otherwise, your seal is susceptible to leaks and sprains. Or, it just won’t fit altogether.
So, before you install your specialty seals, follow our step-by-step instructions to make sure your O-rings are being measured properly. Our Real Seal specialists can help you measure your seals properly so that your hydraulic equipment can run smoothly.
What Are Special Seals?
O-rings are a special type of seal designed for hydraulic and industrial machines; their purpose is to prevent liquid or gas from getting into other areas of the machine. It perfectly closes off an opening, keeping liquids in one chamber and stopping it from leaking into another.
Over time, these O-rings can suffer some natural wear and tear, and it’s only a matter of time before they need to be replaced. When you’re in the market for new specialty seals, the first and most important thing you need to do is measure them. Ensure that they will be apt replacements for your worn-out seals, so your machines can continue running without a hitch.
Steps to Measuring an O-Ring
When you find an O-ring that you want to measure, there are a few easy and quick steps you can take to getting it measured the right way. Follow our Real Seal guide to see how we do it!
1. Place the O-Ring Down Flat
Make sure it’s on a clean and flat surface. This is a key part of the measuring process that can help you to measure your seal correctly.
2. Measure the Inner Diameter
Using a ruler or measuring device, measure the distance from one inner edge to the opposite inner edge. This will determine the diameter of the seal’s opening. Make sure to write down your measurement so you don’t forget it; as you’ll need it later!
3. Measure the Outer Diameter
Using the same method, measure from one outer edge to another. Write down your measurement.
4. Measure the O-Ring Cross Section
It’s important to measure all parts of your specialty seal. For this measurement, you’ll want to put your o-ring in a vernier calliper. Put the jaws of the calliper around the o-ring, but only clamp enough to keep it in place. If you clamp too tightly, it can distort the ring and displace your measurements.
5. Determining the Third Diameter
There are a couple of mathematical formulas you’ll need to remember in order to get the most accurate measurements of the third diameter. Here’s how you figure it out:
● Outside Diameter = Inside Diameter + (2 x Cross Section).
● Inside Diameter = Outside Diameter – (2 x Cross Section).
● Cross Section = (Outside Diameter – Inside Diameter) ÷ 2.
6. Converting Lengths
If you need to convert the lengths because your o-ring is cut, you can use the following formula to determine it:
● Length ÷ 3.142 = Circumference.
● Circumference – Cross Section = Inside Diameter.
Get the Best Specialty Seals for Your Machines Today
At Real Seal, we lead the industry in specialty seals and o-rings. If you are looking for replacements or adjustments, we have a wide range of products and services available for you. Our mechanical goods are guaranteed to be high quality and long-lasting. To find out more about our seals and what we do, you can contact us online or give us a call at (800) 542-6162.
