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Miniature Deep Groove Ball Bearing 684 2RS 4x9x4 mm
Item number:
684-2RS
Item features:
For use in special conditions. The miniature ball bearing 684-2RS is small and suitable for installation with limited space and on thin shafts. Main dimensions according to DIN 625-1.
Technical ScribbleZoomable
Technical Data
| Inside Ø (mm): | 4 |
| Outside Ø (mm): | 9 |
| Width (mm): | 4 |
| Tolerance for inside-Ø (mm): | 0/-0,008 |
| Tolerance for outside-Ø (mm): | 0/-0,008 |
| Tolerance for width (mm): | 0/-0,12 |
| Bore: | cylindrical |
| Extended Inner Ring: | no |
| Seal: | 2RS |
| Sealing material: | NBR |
| Ring Material: | Rolling Bearing Steel |
| Rolling Element Material: | Rolling Bearing Steel |
| Cage Material: | Sheet Steel |
| Type of lubrication: | greased |
| Lifetime lubricated: | yes |
| Seal Colour: | Black |
| Internal Clearance: | CN (Standard) |
| Tolerance Class: | ABEC 1 / P0 |
| Noise and vibration testing: | Class V |
| max. Operating Temperature: | +100°C (briefly up to +120°C) |
| min. Operating Temperature: | -20°C |
| Magnetic: | yes |
| Norm: | DIN 625-1 |
| Item weight: | 1 g |
Features
- miniature ball bearing with smallest dimensions
- suitable for high radial loads and light axial loads in both directions
- suitable for high running accuracy and quiet running
- seal: contact lip seal on both sides made of rubber (2RS) for high sealing effect
- If you need this bearing in RS design with only one seal and one open side, you can simply remove one of the two seals: to the instructions
- good fixed bearing property, but can also be used as a floating bearing, each in both directions
- manufacturers of bearings, such as FAG, KOYO, NSK, SKF, SNR, etc. assign different suffixes for their characteristics, for better orientation take note of the comparison table of bearings (see further information)
Further Information
- What does radial and axial load capacity mean?
- Fit recommendations for mounting
- Info sheet ball bearing
- Information about ball bearing seals
- Internal clearance and operating clearance
- Comparison list of roller bearings
- Comparison of features of roller bearings
- How do I clean my bearings?
- How do I grease or oil my bearings?
- How do I remove a sealing washer or cover plate?