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694 ZZ Miniature Deep Groove Ball Bearing
Double metal shielded, grease-lubricated ultra-compact bearing for space-constrained high-speed applications. 4mm bore, 11mm OD, 4mm width. ABEC precision tolerance, 48,000 RPM max speed, the smallest bearing in the 6000 series.
Key Specifications
- Double metal shields (SPCC): non-contact, minimal drag torque for ultra-compact assemblies
- 48,000 RPM max speed; 0.15kN dynamic, 0.275kN static load capacity
- Radial loads with limited axial capacity in both directions
- Operating temperature: -20°C to 120°C (standard grease); -40°C to 150°C with wide-temp grease option
- Chrome steel (GCr15), ABEC-1 / ABEC-5 precision tolerance
For any inquiries, please contact with our Supporting Team at sales@yuanhecd.com.
| Model | 694 ZZ |
| Type | Shielded |
| Bore Dia (d). | 4 mm |
| Outside Dia (D). | 11 mm |
| Width (B) | 4 mm |
| ABEC Tolerance | 3 |
| Dynamic Load Capacity (kN) | 0.15kN |
| Static Load Capacity (kN) | 0.275kN |
| Max. RPM | 48,000RPM |
| Temp. Range (\u2103) | -40~120\u2103 |
| Material | Steel |
| Shield Material | (SPCC) Mild steel (SPCC) |
| Lubrication | Grease |
Sealing and Lubrication
The ZZ designation indicates double metal shields (SPCC steel) pressed into the outer ring on both sides. These non-contact shields create a narrow labyrinth gap that blocks coarse dust and debris while generating less friction than rubber contact seals\u2014critical at the 4mm bore scale where every millinewton of drag matters. The bearing is factory-packed with a low-noise lithium soap grease and lubricated for life across its service temperature range of -40\u00b0C to 120\u00b0C. For wet or dusty environments, a 694 2RS sealed variant is available.
Performance
The 694 is the smallest bearing in the 6000-series deep groove ball bearing range. Single-row deep groove geometry handles predominantly radial loads at 48,000 RPM with limited bidirectional axial capacity. Dynamic load rating 0.715kN, static load rating 0.275kN. Chrome steel (GCr15) rings and balls with ABEC precision tolerance, manufactured to precision bearing standards. The non-contact metal shield design enables higher speed operation than sealed variants while maintaining low noise and vibration.
OEM and Customization
Custom internal clearance (C2, CN, C3) and grease type available for volume orders. Alternative cage materials (PA66-GF nylon, machined brass) and wide-temperature grease options supported. Batch-level QC reports and dimensional tolerance documentation provided on request. Submit your custom bearing specification for a quote.
Applications
RC micro servos, dental handpiece turbines, optical encoders, 3D printer extruders, micro cooling fans, model aircraft actuators, precision measuring instruments, small robotic joints.
Frequently Asked Questions
FAQ
What maximum speed can the 694 ZZ bearing reach? +
The 694 ZZ runs at speeds up to 50,000 RPM with grease lubrication. The non-contact metal shields add no friction, so the ZZ variant matches the open bearing speed rating. For speeds above 40,000 RPM, consider oil-mist lubrication for additional cooling and longer service life.
How does the 694 ZZ compare to the 694 open bearing? +
The 694 ZZ adds metal shields on both sides while maintaining the same speed rating and load capacity as the open 694. The shields block larger contaminants but do not seal against fine dust or moisture. Open 694 bearings need external seals in the housing. ZZ bearings simplify assembly by providing built-in contamination protection.
What bore tolerance does the 694 ZZ fit? +
The 694 ZZ has a 4mm bore. Shaft tolerance should be h5 for press-fit or g5 for slip-fit. The 4mm bore is one of the smallest standard miniature bearing sizes, commonly used in micro-motors, dental tools, and precision spindles where shaft space is tight.
What is the static load capacity of the 694 ZZ? +
The 694 ZZ has a static load rating of 0.276 kN. This means it can support up to 276 N of stationary load without permanent raceway deformation. Dynamic load rating is 0.15 kN. For applications exceeding 50% of static rating, consult Yuanhe for bearing life calculations.
