SKF 313221 Cylindrical roller bearing
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Product Description
SKF 313221 cylindrical roller bearing. Single-row cylindrical roller bearing carrying very heavy radial load and moderate speed. Standard NU, N, NJ and NUP designs differ only in whether the rib is on inner ring, outer ring, or both — this sets the axial-guidance capability (NU floats axially, NJ takes axial in one direction, NUP in both). Cage execution ECP (glass-fibre reinforced polyamide 6.6) is standard up to bore 100 mm; ECM (machined brass) above. ISO 492 Class Normal. Bore diameter d = 105 mm per ISO 15.
Technical Specifications
- Type
- Cylindrical roller bearing
- Designation
- SKF 313221
- Standard
- ISO 15 / DIN 623 dimension plan; ISO 492 Class Normal precision
- HS code
- 8482.20
- Bore diameter
- 240 mm
- Outside diameter
- 440 mm
- Width
- 120 mm
- Basic dynamic load rating
- 1570 kN
- Basic static load rating
- 2500 kN
- Reference speed
- 1500 r/min
- Limiting speed
- 1700 r/min
- Bearing part
- Complete bearing
- Axial displacement capability
- In both directions
- Number of rows
- 1
- Locating feature, bearing outer ring
- Without
- Bore type
- Cylindrical
- Cage
- Machined brass
- Number of flanges, outer ring
- 2
- Number of flanges, inner ring
- 0
- Loose flange
- None
- Radial internal clearance
- C3R
- Tolerance class
- Normal
- Coating
- Without
- Sealing
- Without
- Lubricant
- None
- Relubrication feature
- Without
- Candidate for remanufacturing
- Yes
- Indicative carbon footprint for new product
- 311 kg CO2e
- Indicative carbon footprint for remanufactured product
- 103 kg CO2e
- Product net weight
- 84 kg
- eClass code
- 23-05-09-01
- UNSPSC code
- 31171505
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
- 8482.20
Cross References
- Timken 313221
- NSK 313221
- NTN 313221
- FAG 313221
- Koyo 313221
- Equivalent: 313221 (Timken)
- Equivalent: 313221 (NSK)
- Equivalent: 313221 (NTN)
- Equivalent: 313221 (FAG)
- Equivalent: 313221 (Koyo)
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
More from SKF
Technical guides
- Cylindrical Roller Bearing Finder — by Bore and Design (NU, NJ, NUP, N, NN / NNU double row) SKF
- SKF 81xxx Cylindrical Roller Thrust Bearing — Dimensions, Load Ratings & Interchange (81102 to 81140)
- SKF Deep Groove Ball Bearing Reference — 6000 / 6200 / 6300 / 6400 Series (Dimensions, Load Ratings, Interchange to FAG NSK NTN Timken)
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 313221?
- 313221 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 313221.
- What is the HS code for 313221?
- The customs tariff (HS) code for 313221 is 8482.20.
- Who manufactures 313221?
- 313221 is a SKF product in the Bearings & Power Transmission range.
- Is a datasheet available for 313221?
- Yes — the 313221 datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for 313221?
- The minimum order quantity is 1.
- Is 313221 available?
- Yes — 313221 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).