BL311
The BL311 is a deep groove ball bearing with bore 55mm, outer diameter 120mm, and width 29mm rated for dynamic load 82.5 kN.
📋 Technical Specifications
| Bearing type | Deep Groove Ball Bearings |
| Series | Full-Complement Deep Groove Ball Bearings |
| Seal type | Confirm per inquiry |
| Material | Confirmed per inquiry — grade and certificate availability reviewed before quotation |
| Bore type | Confirmed per drawing |
| Dimension unit | millimeter (mm) |
🔐 Model Code Breakdown
What each part of BL311 means.
| BL | BL = maximum-type / full-complement bearing |
📋 Nominal Variants by Seal Type
Catalog variants open a detail page. Inquiry-only configurations go directly to RFQ.
| Seal Type | Model Code | Typical Use | |
|---|---|---|---|
| Double metal shields | BL311ZZ | General dust protection | Quote → |
| Double contact rubber seals | BL311 2RS (inquiry only) | Dust and moisture protection at moderate speed | Quote → |
| Double non-contact rubber seals | BL311 2RZ (inquiry only) | Lower-friction sealing at higher speed | Quote → |
| C3 radial clearance | BL311 C3 (inquiry only) | Motors and applications with higher operating temperature | Quote → |
📐 Detailed Dimensions
Basic dimensions (mm)
| Bore diameter (d) | 55 |
| Outer diameter (D) | 120 |
| Width (B) | 29 |
Corner radius, shoulder dimensions, fits and tolerances are confirmed against the requested suffix and application drawing before quotation.
📑 Drawings & 3D Model
Drawings and 3D models are provided per inquiry. Tell us your application and we will send the appropriate file format (DXF, DWG, STEP, IGES).
⚡ Source-Data Reference Speed
Lubrication method and application speed limit are confirmed per inquiry; no oil-speed value is derived from this number.
⇄ Same-size Bearings & Reference Options
The models below share the 55x120x29 mm boundary dimensions. Matching d/D/B alone does not prove interchangeability; verify seals, clearance, ring features, load ratings, fits, and application conditions before replacement.
| Model | Relationship | Series | Seal | Action |
|---|---|---|---|---|
| 6311 | Same boundary dimensions — verify fit/load | 6300 | Open | Quote → |
| 6311 2RS | Same boundary dimensions — verify fit/load | 6300 | Rubber Seals | Quote → |
| 6311 2RZ | Same boundary dimensions — verify fit/load | 6300 | Rubber Seals | Quote → |
| 6311 ZZ | Same boundary dimensions — verify fit/load | 6300 | Metal Shields | Quote → |
| 6311N | Same boundary dimensions — verify fit/load | 6300 | Open | Quote → |
| 6311NR | Same boundary dimensions — verify fit/load | 6300 | Open | Quote → |
| 7311 | Same boundary dimensions — verify fit/load | 73 Series | Open | Quote → |
| BL311ZZ | Configuration variant | Full-Complement Deep Groove Ball Bearings | Open | Quote → |
⚙ Typical Applications
Why choose NLHB?
NLHB supports both in-house manufacturing and qualified partner sourcing. We confirm the specification, supply route, inspection requirements, and available documentation before quotation.
About NLHB →❓ Frequently Asked Questions
Get a quote for BL311
Send us your quantity, application and target lead time. We confirm spec, interchange and realistic delivery — no order confirmed until you approve.
Request Quote →