Producător de rulmenți din oțel inoxidabil | Producător de rulmenți cu bile cu flanșă|Rulmentul Yongnuo
Cel 693ZZ / 693-2RS miniature deep groove ball bearing is a compact, high-precision bearing widely used in small machinery, micro-motors, smart devices, and high-speed rotating systems. Manufactured by NKMB, it delivers exceptional accuracy, low noise, stable performance, and extended service life. With a compact size of 3×8×4 mm, this bearing is ideal for space-limited mechanical designs.
H2: 693ZZ / 693-2RS Bearing Dimensions (3×8×4 mm)
| Parameter | Specification |
|---|---|
| Model | 693ZZ / 693-2RS |
| Tip | Miniature Deep Groove Ball Bearing |
| Bore (d) | 3 milimetru |
| Diametru exterior (D) | 8 milimetru |
| Lățime (B) | 4 milimetru |
| Tip scut | ZZ (metal shields) / 2RS (rubber seals) |
| Brand | NKMB |
H2: Detailed Technical Parameters
H3: 1. Precision Grade
NKMB offers the 693 series in multiple precision levels:
-
P0 / ABEC-1 – Standard precision
-
P6 / ABEC-3 – Higher stability
-
P5 / ABEC-5 – High-speed precision
-
Custom high-precision options available
This ensures extremely smooth rotation and low resistance, suitable for high-RPM applications.
H3: 2. Noise Level (Vibration Grade)
NKMB 693 bearings use advanced grinding technology and noise-controlled lubrication:
-
Z1 / V1: Low noise
-
Z2 / V2: Very low noise
-
Z3 / V3: Ultra-low noise
Commonly used in micro motors and consumer electronics requiring quiet performance.
H3: 3. Internal Clearance (Joc radial)
Available internal clearances:
-
C0: Standard clearance
-
C3: Slightly larger, suitable for high-speed rotation
-
C4: Special high-RPM environments
Clearance accuracy directly improves precision and bearing life.
H3: 4. Operating Temperature
Typical temperature resistance:
-
-20°C to +120°C (standard steel + standard grease)
-
+150°C with high-temperature grease
-
Special application grease available upon request
Perfect for motors, micro-electromechanical systems (MEMS), and industrial equipment.
H3: 5. Service Life
Service life depends on load, temperature, and lubrication:
-
5,000–10,000 hours (normal use)
-
Up to 20,000+ hours with NKMB premium grease
NKMB bearings use wear-resistant steel and optimized heat treatment for long durability.
H2: 693ZZ vs 693-2RS — Which Is Better?
| Model | Features | Advantages |
|---|---|---|
| 693ZZ | Scuturi metalice duble | Higher speed, dust-resistant, smooth rotation |
| 693-2RS | Double rubber seals | Better waterproofing, protects from fine dust |
Choose based on environment and sealing requirements.
H2: Key Applications of 693ZZ / 693-2RS Bearings
The NKMB 693 series is widely used in:
H3: • Micro Motors & Small Electric Tools
Ensures stable high-speed rotation.
H3: • Robotics & Automation
Compact size is ideal for joints, mini-actuators, and precision modules.
H3: • Drones & Model Aircraft
Lightweight design with high rotational efficiency.
H3: • Medical Devices
High precision and very low noise.
H3: • Smart Home Devices & Appliances
Used in fans, drive systems, miniature mechanisms.
H3: • Office Equipment
Imprimante, Scanere, small rotating systems.
H2: Why Choose NKMB 693ZZ / 693-2RS Miniature Bearings?
NKMB is known for delivering:
✔ Precision grinding technology
✔ Excellent sealing performance
✔ Low friction, low vibration
✔ Custom precision, clearance, and grease options
✔ Long service life & stable quality
✔ Full size range of miniature bearings
For high-speed, small-scale, and precision components, NKMB provides a reliable and stable solution.
H2: Concluzie
Cel NKMB 693ZZ / 693-2RS miniature bearing (3×8×4 mm) is a superior choice for industries requiring compact dimensions, high precision, and long-term reliability. Whether used in robotics, electronics, or micro-motors, this model provides exceptional performance, low noise, and durable operation—making it one of the most popular miniature bearings in the global market.
