SKF 4991 CR / HMS / HMSA radial shaft seal
Pricing
Request a quote
We reply within 24 hours
Product Description
SKF 4991 cr / hms / hmsa radial shaft seal. SKF radial shaft seal for rotating-shaft primary containment against dust, splash and low-head oil pressure. Designation CR / HMS5 / HMSA10 / HMSA10RG (single lip, single lip with dust lip, double lip with garter spring). Elastomer standard nitrile (NBR) to ISO 6194-1 with metal case; hydrogenated nitrile (HNBR), fluoroelastomer (FKM / Viton), silicone (VMQ) and polyacrylate (ACM) available by suffix. Bore, outside diameter and width follow ISO 6194 / DIN 3760.
Technical Specifications
- Type
- CR / HMS / HMSA radial shaft seal Designation: SKF 4991 HS code: 4016.93 Shaft diameter: 12.7 mm Housing bore diameter: 25.37 mm Seal width: 6.35 mm Limiting speed: 13655 r/min Maximum operating temperature: 200 °C minimum operating temperature: -25 °C Permissible circumferential speed: 7.2 m/s Rotational speed: 13655 r/min Design: CRWA5 Auxiliary lip: Yes Sealing lip material: Fluoro rubber (FKM) Type of outside diameter: Metal-cased with sealant coating on the outside diameter Unit system: Inch Product net weight: 0.005 kg eClass code: 23-07-08-01 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
- Freudenberg 4991
- Trelleborg 4991
- Chesterton 4991
- Garlock 4991
- National 4991
- Equivalent: 4991 (Freudenberg)
- Equivalent: 4991 (Trelleborg)
- Equivalent: 4991 (Chesterton)
- Equivalent: 4991 (Garlock)
- Equivalent: 4991 (National)
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
More from SKF
SKF
SKF 49927 CR / HMS / HMSA radial shaft seal
SKF
SKF 49928 CR / HMS / HMSA radial shaft seal
SKF
SKF 49929 CR / HMS / HMSA radial shaft seal
SKF
SKF 49951 CR / HMS / HMSA radial shaft seal
SKF
SKF 4996 CR / HMS / HMSA radial shaft seal
SKF
SKF 49960 CR / HMS / HMSA radial shaft seal
SKF
SKF 49966 CR / HMS / HMSA radial shaft seal
SKF
SKF 49984 CR / HMS / HMSA radial shaft seal
Technical guides
Catalogue entry last verified: 2026-08-30. A manufacturer datasheet is attached to this entry — confirm application-critical values against it.
Frequently asked questions
- Where can I buy 4991?
- 4991 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 4991.
- What is the HS code for 4991?
- The customs tariff (HS) code for 4991 is 4016.93.
- Who manufactures 4991?
- 4991 is a SKF product in the Seals & Gaskets range.
- Is a datasheet available for 4991?
- Yes — the 4991 datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for 4991?
- The minimum order quantity is 1.
- Is 4991 available?
- Yes — 4991 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).