SKF 313221 Cylindrical roller bearing

SKF · Bearings & Power Transmission · Cylindrical Roller Bearings · Sweden · skf.com

Part Number
313221 · HS 8482.20

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

Properties

Material	Bearing steel — 100Cr6 (through-hardened) or SNR-nitrided; cage as declared by suffix
Temperature range	-30 to +120 °C standard grease
Primary standard	ISO 15 / ISO 492 / DIN 623
Dimensions	bore d = 105 mm
MOQ	1

Compatibility

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.

Standards

ISO 15
ISO 492
DIN 623

Cross-References

Timken 313221
NSK 313221
NTN 313221
FAG 313221
Koyo 313221

Attached Documents

SKF 313221 Cylindrical roller bearing — Specification sheet