In a car's gearbox (transmission box), X-ring seals can be used in multiple locations and functions to ensure the sealing of lubricating oil and prevent leakage.
Gearbox Input Shaft Seal: X-ring seals can be used to seal the interface between the gearbox input shaft and the gearbox housing. They prevent lubricating oil from leaking out of the gearbox housing and prevent external impurities from entering the gearbox.
Gear Shaft Seals: X-ring seals can be used to seal the interface between the gear shaft and the gearbox housing. They ensure that the lubricant forms an effective seal around the gear shaft, preventing leakage and loss of lubricant.
Output Shaft Seal: X-ring seals can be used to seal the interface between the gearbox output shaft and the gearbox housing. They prevent lubricating oil from leaking out from inside the gearbox, maintaining the stability and efficiency of the oil lubrication system.
Shift Lever Seal: The X-ring seal can be used to seal the hole where the shift lever (shift lever or selector lever) passes through the gearbox housing. They prevent lubricant from leaking out of the holes and keep the shifter operating smoothly.
| N-568 | Actual Size Millimeters | |||
| I.D. | ± | C.S. | ± | |
| X-RING 01 | 75.92 | 0.51 | 1.78 | 0.08 |
| X-RING 02 | 82.27 | 0.61 | 1.78 | 0.08 |
| X-RING 03 | 88.62 | 0.61 | 1.78 | 0.08 |
| X-RING 04 | 94.97 | 0.69 | 1.78 | 0.08 |
| X-RING 05 | 101.32 | 0.69 | 1.78 | 0.08 |
| X-RING 06 | 107.67 | 0.76 | 1.78 | 0.08 |
| X-RING 07 | 114.02 | 0.76 | 1.78 | 0.08 |
| X-RING 08 | 120.37 | 0.76 | 1.78 | 0.08 |
| X-RING 09 | 126.72 | 0.94 | 1.78 | 0.08 |
| X-RING 10 | 133.07 | 0.94 | 1.78 | 0.08 |
These are common X-ring seal applications in automotive gearboxes, and they play an important role in ensuring the lubricant is sealed and leak-proof.
| ltem | NBR rubber | Test Method |
| Color | black., etc | - |
| Specific gravity | 1.3-1.5g/cm3 | ASTM D297 |
| Hardness | 40°-80° Shore A | ASTM D2240 |
| Tensile strength | 13 MPa (min) | ASTM D412 |
| Elongation at break | 250% (min) | ASTM D412 |
| Width | Normal or custom | - |
| Tear strength | 35 N/mm | ASTM D 624 |
| Low temperature resistance | 25°C | ASTM D1329 |
| Temperature range | -25°C to +120°C | ASTM D2000 |
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