What should be prepared before measurement?
Before measuring, clean the component and groove and check that the measurement surfaces are free from oil, dirt and burrs. Use a suitable precision measuring tool and repeat measurements at different points whenever possible.
How are the basic dimensions determined?
- Rod diameter: Measure the rod surface on which the seal operates. Checking different directions and points is useful where wear may be present.
- Housing diameter: This is the relevant diameter of the housing or groove in which the seal is installed. The measurement point must be identified according to how the product operates.
- Groove width: This is the axial distance of the groove in which the product is installed. It is measured between the groove sides.
- Additional dimensions: Some products may require groove depth, radius, chamfer or auxiliary component dimensions. Refer to the available product drawing and size table.
Common measurement errors
- Using a worn or compressed old seal as the only reference.
- Confusing rod and housing dimensions.
- Recording groove width as a diameter.
- Providing values without stating whether they are inches or millimetres.
- Not explaining decimal separators or the dimension order.
- Ignoring surface wear and groove damage during measurement.
For technical evaluation, provide available dimensions such as rod diameter, housing diameter and groove width separately, together with their units. Required dimensions may vary by product type. If a product code or technical drawing is available, send it with the dimensions.
Frequently Asked Questions
Is measuring the seal itself sufficient?
A used seal may be worn, swollen or deformed. Groove and dynamic surface dimensions therefore provide more reliable verification.
Which basic dimensions are required?
Although requirements vary by product type, rod diameter, housing diameter and groove width are the basic starting dimensions.
Can I request a quote if I am unsure of the dimensions?
Yes. You can request a technical evaluation by sharing the available sample, photographs, approximate dimensions or technical drawing.
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Let us check your dimensions together.
Send your dimensions, sample, photographs or technical drawing to our technical team.