Miniature Bearing 693ZZ / 693-2RS(ラトリー) (3×8×4 mm) — Full Technical Overview by NKMB

ザ 693ZZさん / 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, 低騒音, 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さん / 693-2RS Bearing Dimensions (3×8×4 mm)

H2: Detailed Technical Parameters

H3: 1. Precision Grade

NKMB offers the 693 series in multiple precision levels:

• P0 / ABEC-1 – Standard precision

• P6の / ABEC-3 – Higher stability

• P5の / 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の: Ultra-low noise

Commonly used in micro motors and consumer electronics requiring quiet performance.

H3: 3. Internal Clearance (ラジアルプレイ)

Available internal clearances:

• C0: Standard clearance

• C3の: 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)

• まで 20,000+ 時間 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?

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

プリンター, スキャナー, 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: 結論

ザ 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, 電子工学, or micro-motors, this model provides exceptional performance, 低騒音, and durable operation—making it one of the most popular miniature bearings in the global market.