SKF UCF311 Flanged ball bearing unit (UCF / UCFC / UCFL)
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Product Description
SKF UCF311 flanged ball bearing unit (ucf / ucfc / ucfl). Square four-bolt (UCF), round three-bolt (UCFC) or oval two-bolt (UCFL) flanged housing pre-assembled with a spherical-outer-ring insert bearing. Absorbs shaft-to-housing misalignment on assembly. Set-screw shaft attachment on standard UC-series insert; eccentric-collar (UEL) or adapter-sleeve (UK) variants available. Dimensioned to ISO 3228 / DIN 626. Shaft bore diameter 55 mm, encoded by the SKF designation.
Technical Specifications
- Type
- Flanged ball bearing unit (UCF / UCFC / UCFL)
- Designation
- SKF UCF311
- Bore d
- 55 mm
- HS code
- 8483.20
- Shaft bore
- 55 mm
- Shaft diameter
- 55 mm
- Housing overall width
- 53 mm
- Width, total
- 71 mm
- Centre distance between bolt holes
- 140 mm
- Bearing width, total
- 66 mm
- Attachment bolt diameter
- 20 mm
- Basic dynamic load rating
- 71.5 kN
- Basic static load rating
- 45 kN
- Limiting speed
- 3100 r/min
- Note
- Limiting speed with shaft tolerance h6
- Housing type
- Flanged
- Flanged housing type
- Square
- Number of bolt holes for fasteners
- 4
- Fastening bolt hole type
- Plain
- Retaining feature, inner ring
- Set screws
- Bore type
- Cylindrical
- Rubber seating ring
- Without
- Material, housing
- Cast iron
- Material, bearing
- Bearing steel
- Coating
- Without
- Sealing, bearing
- Seal and flinger on both sides
- Sealing type
- Contact, standard
- Sealing, unit
- Without
- Lubricant
- Grease
- Relubrication hole
- With
- Grease fitting
- With
- Product net weight
- 5.5 kg
- eClass code
- 23-05-16-02
- UNSPSC code
- 31171536
Standards & Compliance
- Standard
- SKF designation convention
- Material
- As declared by SKF designation suffix
- Temperature Range
- Per SKF product data
- HS Code
- 8483.20
Cross References
- NTN 311
- NSK 311
- FAG 311
- Koyo 311
- ASAHI 311
- Equivalent: 311 (NTN)
- Equivalent: 311 (NSK)
- Equivalent: 311 (FAG)
- Equivalent: 311 (Koyo)
- Equivalent: 311 (ASAHI)
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: 2026-08-13. A manufacturer datasheet is attached to this entry — confirm application-critical values against it.
Frequently asked questions
- Where can I buy UCF311?
- UCF311 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 UCF311.
- What is the HS code for UCF311?
- The customs tariff (HS) code for UCF311 is 8483.20.
- Who manufactures UCF311?
- UCF311 is a SKF product in the Bearings & Power Transmission range.
- Is a datasheet available for UCF311?
- Yes — the UCF311 datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for UCF311?
- The minimum order quantity is 1.
- Is UCF311 available?
- Yes — UCF311 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).