Key specifications
- Diameter range
- Ø 30 – 180 mm
- Standard sizes
- 60+
Selected size:
Product Description
Asymmetric polyurethane IDI U-cup resistant to high pressure in heavy-duty cylinders. 60+ standard sizes available. For a quote, please send the size (ID × OD × height), material and quantity.
Technical Specifications
| Diameter range | Ø 30 – 180 mm |
|---|---|
| Standard sizes | 60+ |
Size Table
This product is available in 62 standard sizes. The table shows how they are distributed; use the size finder to see every size.
| Inner diameter d (mm) – range | Outer diameter D (mm) | Height H (mm) | Sizes |
|---|---|---|---|
| 30 – 50 | 40 – 60 | 6 – 9 | 11 |
| 50 – 80 | 60 – 95 | 6 – 12 | 16 |
| 80 – 120 | 90 – 135 | 6 – 16 | 28 |
| 120 – 200 | 140 – 205 | 12 – 16 | 7 |
🔎 Size finder
Applications
- Rod sealing in hydraulic cylinders
- Press, lifting and construction machinery cylinders
- Rotary joints and indexing applications
- Pneumatic cylinder rods
Information Needed for a Quote
- Rod diameter, groove outer diameter and groove width (mm)
- Seal type (U-cup, buffer, rod seal) or existing code
- Operating pressure, temperature and speed
- Fluid type
- Quantity
Selection and Usage Notes
- In heavy-duty cylinders a buffer seal is used together with the primary rod seal to absorb pressure peaks.
- Polyurethane (PU) seals are widely used in hydraulic oil thanks to their wear resistance; choose FKM for high temperatures.
- The rod should be hard-chrome plated and smooth; make sure the seal lip faces the right way when fitting.
Frequently Asked Questions
Is a rod seal the same as a wiper?
No. The rod seal keeps pressurised oil inside; the wiper keeps dust and dirt out. They are used together.
Which material lasts longest?
In hydraulic oil, polyurethane usually offers the best wear resistance; depending on temperature and fluid we may recommend FKM or PTFE.
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