Measure its id and look it up on a size chart.
O ring thickness measurement.
Use the usa standard o ring sizing chart to find parker and as568 o ring sizes that work for your application.
The o ring store llc o ring sizing cone the o ring store.
If the o ring is cut measure the cross section thickness and the length.
Popular o ring size standards include usa s as568 o ring size chart the uk s bs 1806 o ring sizing chart and japan s jis b 2401 o ring size list.
Use the o ring size chart to find the perfect as568 o rings for you.
O rings are the most commonly used and widely available rubber sealing rings in the market.
Use a ruler to measure the diameter from one outer corner of the o ring to the other outer corner.
Length 3 142 cs inside diameter.
Determine the inside diameter by using a ruler to measure from one inner edge to another.
Various nations and organizations have developed o ring sizing standards that are now used worldwide.
Quick reference tape measure confirms metric size o rings 64mm 665mm inside diameter on one side and usa as568 standard o ring sizes from 2 5 id to 26 inside diameter on the other side.
Converting length to inside diameter.
Place the o ring on a level flat surface.
Whether your application conforms to u s japanese jis british bs or common metric sizing for o rings these o ring size charts will help you locate the right o ring size.
Below are the steps to take to properly measure for a new or replacement o ring.
Consider a sizing cone for small o rings under 2 5 inside diameter.
How to measure an o ring.
The measurements are either in inches or in millimeters.
To identify which as568b standard o ring size is appropriate for your application you must know the required cross sectional diameter and either the inside diameter or the outside diameter.
The proper o ring size is a fundamental aspect of proper o ring performance.
Steps to follow for an accurate measurement of o ring dimensions.
Metric and inch cross section thickness reference gauge.
If the o ring quad ring x ring or square ring you need doesn t fit these standards custom.
Parco s o ring size chart is arranged by cross sectional diameter and then inside diameter.
If the id is listed on the chart or within tolerance you have a standard size.
The diagram shows exactly where these dimensions are to be found.
All you need to do is measure the internal diameter id or outside diameter od and the width or cross section c s of the o ring.
Place the o ring on a clean flat level surface.
O ring sizes are specified by the inside diameter outside diameter od and the diameter of the cross section thickness.
