SKF 556904 — HDL / HDS / HS radial shaft seal for heavy industrial service
SKF · Seals & Gaskets · Radial Shaft Seals — Heavy Industrial
SKF 556904 hdl / hds / hs radial shaft seal for heavy industrial service. SKF wide-cross-section radial shaft seal for heavy industrial shafts, generally above 200 mm bore. Wider seal face improves fatigue life on paper mills, marine deck machinery, steel mills, cement mills and mining conveyors. Standard elastomer nitrile (NBR) or hydrogenated nitrile (HNBR); FKM available. Full metal case (HS type) or rubberised outside diameter (HMS variants). Dimensioned per ISO 6194 and OEM engineering drawings. Designation follows the SKF alphanumeric identification convention where the numeric block encodes the boundary plan and the suffix declares execution options (material, sealing, cage, precision, clearance, lubricant). Genuine SKF supply carries the SKF logo etch or moulded mark and hologram-authenticated packaging.
Specifications
- Part number
- 556904
- HS code
- 4016.93
- Material
- As declared by SKF designation suffix
- Temperature range
- Per SKF product data
- Standard
- SKF designation convention (see description for governing ISO / DIN)
Compatibility
Interchange with peer OEM equivalents on identical boundary plan and execution — confirm cage, clearance, sealing and precision-class suffix before substitution.
Also known as — OEM cross-references & superseded numbers
- Freudenberg 556904
- Trelleborg 556904
- Chesterton 556904
- Garlock 556904
- Competitor equivalent: 556904 (Freudenberg)
- Competitor equivalent: 556904 (Trelleborg)
- Competitor equivalent: 556904 (Chesterton)
- Competitor equivalent: 556904 (Garlock)
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