SKF PTB312-2125-375-J1S Hydraulic rod seal / buffer seal
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Product Description
SKF PTB312-2125-375-J1S hydraulic rod seal / buffer seal. Hydraulic cylinder rod-side sealing element — primary rod seal (PU / thermoplastic polyurethane, filled PTFE, elastomer) or upstream buffer seal absorbing pressure spikes. Rated to 400-700 bar depending on execution. Groove per ISO 5597 / ISO 7425-2. Suitable for deck cranes, hatch covers, steering gear, hydraulic winches.
Technical Specifications
- Type
- Hydraulic rod seal / buffer seal
- Designation
- SKF PTB312-2125-375-J1S
- HS code
- 4016.93
- Rod diameter
- 53.98 mm
- Housing groove diameter
- 69.82 mm
- Housing groove width
- 10.48 mm
- Pressure limit, maximum
- 40 N/mm²
- Design
- PTB
- Primary sealing element
- Polyurethane (TPU U-1003)
- Compound 2
- Nitrile Rubber (NBR A-8501)
- Unit system
- Inch
- Product net weight
- 0.025 kg
- eClass code
- 23-07-01-90
- UNSPSC code
- 31181602
Standards & Compliance
- Standard
- SKF designation convention (see description for governing ISO / DIN)
- Material
- As declared by SKF designation suffix
- Temperature Range
- Per SKF product data
- HS Code
- 4016.93
Cross References
- Trelleborg 31221253751
- Parker 31221253751
- Freudenberg 31221253751
- Hallite 31221253751
- Equivalent: 31221253751 (Trelleborg)
- Equivalent: 31221253751 (Parker)
- Equivalent: 31221253751 (Freudenberg)
- Equivalent: 31221253751 (Hallite)
Compatibility & Fitment
Interchange with peer OEM equivalents on identical boundary plan and execution — confirm cage, clearance, sealing and precision-class suffix before substitution.
Product Documentation
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Technical guides
Catalogue entry last verified: 2026-09-30. A manufacturer datasheet is attached to this entry — confirm application-critical values against it.
Frequently asked questions
- Where can I buy PTB312-2125-375-J1S?
- PTB312-2125-375-J1S can be ordered from cballast.com as a SKF catalogue item: request a quotation on this page or email sales@cballast.com, and the order ships worldwide.
- What is the manufacturer part number for this SKF product?
- The manufacturer part number is PTB312-2125-375-J1S.
- What is the HS code for PTB312-2125-375-J1S?
- The customs tariff (HS) code for PTB312-2125-375-J1S is 4016.93.
- Who manufactures PTB312-2125-375-J1S?
- PTB312-2125-375-J1S is a SKF product in the Seals & Gaskets range.
- Is a datasheet available for PTB312-2125-375-J1S?
- Yes — the PTB312-2125-375-J1S datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for PTB312-2125-375-J1S?
- The minimum order quantity is 1.
- Is PTB312-2125-375-J1S available?
- Yes — PTB312-2125-375-J1S is available to order: fulfilment is from supplier stock in cBallast's European network, dispatched directly from the warehouse to the customer, with the exact lead time stated in the quotation (reply within 24 hours).