System of Measurement System of Measurement |
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For Use With For Use With |
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Material Material | Show |
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Material Material | Hide |
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Cylinder Seal Type Cylinder Seal Type |
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| Piston Seal |
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| Rod Seal |
For Cylinder Type For Cylinder Type |
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Maximum Pressure Maximum Pressure |
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For Groove Diameter For Groove Diameter |
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Maximum Temperature Maximum Temperature |
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Minimum Temperature Minimum Temperature |
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Maximum Speed Maximum Speed |
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Environment Environment |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Color Color |
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 | Black |
About Cylinder Seals
Rod wipers scrape dirt, dust, and moisture from the rod, preventing contamination inside your cylinder.
Rod seals maintain the pressure inside cylinders and prevent fluid from leaking out.
Wear rings guide the rod and piston to prevent uneven wear and optimize seal performance.
Head seals are a more reliable alternative to the standard O-ring/backup ring combination—they resist twisting and remain stable even in applications with fluctuating pressure.
Buffering seals protect hydraulic cylinders from pressure spikes and shock in high-pressure hydraulic applications.
Cushioning seals minimize wear and noise in air-powered cylinders by preventing the piston from slamming against the cylinder body.
Piston seals make a seal between their outside edge and the cylinder bore to prevent internal leaks.
High-Pressure Leather U-Cup Seals
Rated for pressure up to 10,000 psi, these leather U-cups handle over 80 times more pressure than our Buna-N U-cups. Leather is tough, pliable, and wear resistant, so it flexes to fit uneven surfaces and fill voids. U-cups can be used for rod and piston sealing. Pistons require two seals—install one facing in each direction.
Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.
For technical drawings and 3-D models, click on a part number.
For Rod Sealing | For Piston Sealing | |||||||
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| For Rod Dia. | For Groove Dia. | For Bore Dia. | For Groove Dia. | Max. Pressure, psi | Temp. Range, °F | Color | Each | |
Wax-Filled Leather | ||||||||
For 1/4" Groove Wd. | ||||||||
| 1/4" | 0.750" | 3/4" | 0.250" | 10,000 | 0° to 180° | Black | 0000000 | 000000 |
| 3/8" | 0.875" | 7/8" | 0.375" | 10,000 | 0° to 180° | Black | 0000000 | 00000 |
| 1/2" | 1.000" | 1" | 0.500" | 10,000 | 0° to 180° | Black | 0000000 | 00000 |
| 5/8" | 1.125" | 1 1/8" | 0.625" | 10,000 | 0° to 180° | Black | 0000000 | 00000 |
| 3/4" | 1.250" | 1 1/4" | 0.750" | 10,000 | 0° to 180° | Black | 0000000 | 00000 |
| 7/8" | 1.375" | 1 3/8" | 0.875" | 10,000 | 0° to 180° | Black | 0000000 | 00000 |
| 1" | 1.500" | 1 1/2" | 1.000" | 10,000 | 0° to 180° | Black | 0000000 | 00000 |
| 1 1/8" | 1.625" | 1 5/8" | 1.125" | 10,000 | 0° to 180° | Black | 0000000 | 00000 |
| 1 1/4" | 1.750" | 1 3/4" | 1.250" | 10,000 | 0° to 180° | Black | 0000000 | 00000 |