SKF 311 Deep-groove ball bearing

SKF · Bearings & Power Transmission · Deep Groove Ball Bearings · Sweden · skf.com

Part Number
311 · HS 8482.10

SKF 311 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 311
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	Without
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

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 = 55 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 311
NSK 311
NTN 311
FAG 311
Koyo 311
NACHI 311

Attached Documents

SKF 311 Deep-groove ball bearing — Specification sheet