SKF 311NR Deep-groove ball bearing
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Product Description
SKF 311NR deep-groove ball bearing. Deep-groove ball bearing designed for combined radial and moderate axial load, high running speed and low frictional torque. Manufactured to ISO 492 (Class Normal / P6 / P5) with standard C0 radial internal clearance unless a suffix declares otherwise. Available in open, single-shielded (Z), double-shielded (2Z), single-lip contact-sealed (RSH / RS1), and double-lip contact-sealed (2RSH / 2RS1) execution. Bore, outside diameter and width follow the ISO 15 dimension plan. Bore diameter d = 55 mm per ISO 15.
Technical Specifications
- Type
- Deep-groove ball bearing
- Designation
- SKF 311NR
- Standard
- ISO 15 / DIN 623 dimension plan; ISO 492 Class Normal precision
- HS code
- 8482.10
- Bore diameter
- 55 mm
- Outside diameter
- 120 mm
- Width
- 29 mm
- Basic dynamic load rating
- 79.2 kN
- Basic static load rating
- 67 kN
- Reference speed
- 10000 r/min
- Limiting speed
- 6300 r/min
- Filling slots
- With
- Number of rows
- 1
- Locating feature, bearing outer ring
- Snap ring (fitted)
- Bore type
- Cylindrical
- Cage
- Sheet metal
- Matched arrangement
- No
- Radial internal clearance
- CN
- Material, bearing
- Bearing steel
- Coating
- Without
- Sealing
- Without
- Lubricant
- None
- Relubrication feature
- Without
- Indicative carbon footprint for new product
- 5.6 kg CO2e
- Product net weight
- 1.5 kg
- eClass code
- 23-05-08-01
- UNSPSC code
- 31171504
Standards & Compliance
- Standard
- ISO 15 / ISO 492 / DIN 623
- Material
- Bearing steel — 100Cr6 (through-hardened) or SNR-nitrided; cage as declared by suffix
- Temperature Range
- -30 to +120 °C standard grease
- HS Code
- 8482.10
Cross References
- Timken 311
- NSK 311
- NTN 311
- FAG 311
- Koyo 311
- NACHI 311
- Equivalent: 311 (Timken)
- Equivalent: 311 (NSK)
- Equivalent: 311 (NTN)
- Equivalent: 311 (FAG)
- Equivalent: 311 (Koyo)
- Equivalent: 311 (NACHI)
Compatibility & Fitment
ISO 15 boundary-plan interchange — the numeric bore-code block is portable across every ISO 15 bearing manufacturer (SKF, Timken, NSK, NTN, FAG, Koyo, NACHI). Confirm suffix compatibility on cage, seal, clearance and precision class 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 311NR?
- 311NR 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 311NR.
- What is the HS code for 311NR?
- The customs tariff (HS) code for 311NR is 8482.10.
- Who manufactures 311NR?
- 311NR is a SKF product in the Bearings & Power Transmission range.
- Is a datasheet available for 311NR?
- Yes — the 311NR datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for 311NR?
- The minimum order quantity is 1.
- Is 311NR available?
- Yes — 311NR 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).