The 637 ZZ is a deep groove ball bearing with bore 7mm, outer diameter 26mm, and width 9mm rated for dynamic load 4.5 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 | 637 | High speed in clean environments | Quote → |
| Double contact rubber seals | 637 2RS | Dust and moisture protection at moderate speed | Quote → |
| Double non-contact rubber seals | 637 2RZ | Lower-friction sealing at higher speed | Quote → |
| C3 radial clearance | 637 C3 (inquiry only) | Motors and applications with higher operating temperature | Quote → |
| Bore diameter (d) | 7 |
| Outer diameter (D) | 26 |
| Width (B) | 9 |
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 7x26x9 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 |
|---|---|---|---|---|
| 637 | Configuration variant | 6300 | Open | Quote → |
| 637 2RS | Configuration variant | 6300 | Rubber Seals | Quote → |
| 637 2RZ | Configuration variant | 6300 | Rubber Seals | Quote → |
| 637zz | Configuration variant | Metric Miniature Series | Shielded | Quote → |
| 637ZZ1 | Same boundary dimensions — verify fit/load | 6300 | Metal Shields | 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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