IDI Rod Seals | What IDI Rod Seals ? NOK SEAL HYDRAULIC | A2Z SEALS
Product Description
• A large cross-section design that can be used over a wide pressure range
• Uses U801 iron rubber in the materials for excellent abrasion resistance and also sealing capability
NOK OIL SEAL
Nok oil seal is a mechanical component used to seal oil. It isolates the parts of the transmission component that need to be lubricated from the output components so that lubrication and leakage are not allowed.
Special Packing for Rod Seals
R = 0.3 or below
R1 = 0.5 or below
The surface of the rod should be finished by buffing (SPBF) to 0.8 to 1.6 μmRz (0.2 to 0.4 μmRz).
• The roughness is JIS B 2601 : 2001. When regulation length cannot be kept, apply Pt.
How to Determine B dimension
■ When using backup ring.
Please determine B dimension according to the table below.
| Maximum Service Pressure | 14MPa | 21MPa | 35MPa |
| Material of Backup ring | 19YF | ||
| B dimension | B ≦ ø D + 1.0 | B ≦ ø D + 0.5 | B ≦ ø D + 0.2 |
| Maximum Service Pressure | 35MPa | 42MPa | 70MPa |
| Material of Backup ring | 80NP | ||
| B dimension | B ≦ ø D + 0.8 | B ≦ ø D + 0.4 | B ≦ ø d + 0.2 |
■ When not using backup ring.
To detemine B dimension, please refer to the graph in the right for the maximum
extrusion gap (one side) considering the eccentricity of operating condition of the rod.
Specification Table
IDI type Iron rubber (PUR)
Material : NOK U801
Remark :※Marked size : The pressure resistance limit conforms to the ISI type