The 634 ZZ is a deep groove ball bearing with bore 4mm, outer diameter 16mm, and width 5mm rated for dynamic load 1.7 kN.
| Bearing type | Deep Groove Ball Bearings |
| Series | Extra Small / Miniature Deep Groove Ball Bearing |
| Seal type | Metal Shields |
| Material | Confirmed per inquiry — grade and certificate availability reviewed before quotation |
| Bore type | Confirmed per drawing |
| Dimension unit | millimeter (mm) |
Catalog variants open a detail page. Inquiry-only configurations go directly to RFQ.
| Seal Type | Model Code | Typical Use | |
|---|---|---|---|
| Open | 634 | High speed in clean environments | Quote → |
| Double contact rubber seals | 634 2RS (inquiry only) | Dust and moisture protection at moderate speed | Quote → |
| Double non-contact rubber seals | 634 2RZ (inquiry only) | Lower-friction sealing at higher speed | Quote → |
| C3 radial clearance | 634 C3 (inquiry only) | Motors and applications with higher operating temperature | Quote → |
| Bore diameter (d) | 4 |
| Outer diameter (D) | 16 |
| Width (B) | 5 |
Corner radius, shoulder dimensions, fits and tolerances are confirmed against the requested suffix and application drawing before quotation.
Drawings and 3D models are provided per inquiry. Tell us your application and we will send the appropriate file format (DXF, DWG, STEP, IGES).
Lubrication method and application speed limit are confirmed per inquiry; no oil-speed value is derived from this number.
The models below share the 4x16x5 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 |
|---|---|---|---|---|
| -02 (WR16-A) | Same boundary dimensions — verify fit/load | WR / International Series | Open | Quote → |
| -04 (WR16-B) | Same boundary dimensions — verify fit/load | WR / International Series | Open | Quote → |
| -05 (WR16-C) | Same boundary dimensions — verify fit/load | WR / International Series | Open | Quote → |
| -07 (WR16-D) | Same boundary dimensions — verify fit/load | WR / International Series | Open | Quote → |
| 30.M.14.078-02 | Same boundary dimensions — verify fit/load | V-Groove / U-Groove | Open | Quote → |
| 30.M.14.078-04 | Same boundary dimensions — verify fit/load | V-Groove / U-Groove | Open | Quote → |
| 30.M.14.078-07 | Same boundary dimensions — verify fit/load | V-Groove / U-Groove | Open | Quote → |
| 30.M.14.078-08 | Same boundary dimensions — verify fit/load | V-Groove / U-Groove | Open | Quote → |
| 420-M.294.012/1-01 | Same boundary dimensions — verify fit/load | V-Groove / U-Groove | Open | Quote → |
| 634 | Configuration variant | 6300 | Open | Quote → |
| 634 2rs | Configuration variant | Metric Miniature Series | Sealed | Quote → |
| 634zz | Configuration variant | Metric Miniature Series | Shielded | Quote → |
| 634ZZ1 | Same boundary dimensions — verify fit/load | 6300 | Metal Shields | Quote → |
| E4 | Same boundary dimensions — verify fit/load | Radials | Open | Quote → |
| EN4 | Same boundary dimensions — verify fit/load | Radials | Open | Quote → |
| F634 | Different outer-ring feature | Standard Flanged Bearings | Sealed | Quote → |
| F634 2rs | Different outer-ring feature | F634 | Sealed | Quote → |
| F634 ZZ | Different outer-ring feature | F634 | Metal Shields | Quote → |
| F634zz | Different outer-ring feature | F634 | Shielded | Quote → |
| F634ZZ1 | Different outer-ring feature | Standard Flanged Bearings | Open | Quote → |
| SF634 | Same boundary dimensions — verify fit/load | F634 | Open | Quote → |
| SF634 2rs | Same boundary dimensions — verify fit/load | F634 | Sealed | Quote → |
| SF634zz | Same boundary dimensions — verify fit/load | F634 | Shielded | Quote → |
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 →Send us your quantity, application and target lead time. We confirm spec, interchange and realistic delivery — no order confirmed until you approve.
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