Miniature ball bearing/698ZZ/NskskfFAG/Rolling Bearing/suitable for miniature motors
Product Description
NSK 698ZZ Bearing Introduction:
1. Dimensions:
- Inner diameter: 8 millimeters
- Outer diameter: 19 millimeters
- Width: 6 millimeters
2. Structure: The bearing features double metal shields to protect the rolling elements inside the bearing. It adopts a deep groove ball bearing structure, consisting of inner and outer rings and steel balls. The gap between the inner and outer rings accommodates the steel balls for rolling motion.
3. Material: The inner and outer rings, as well as the steel balls of the bearing, are typically made of high-quality chrome steel material to provide excellent wear resistance and corrosion resistance. This material enables the bearing to deliver stable and reliable performance under high-speed rotation and load conditions.
4. Applications: Due to its small size and excellent performance, The bearings are widely used in applications such as micro motors, model making, drones, toys, electronic devices, and instrumentation. They can be used to support rotating components, reduce friction, and provide smooth motion.
5. High-speed operation: The bearing is designed for high-speed rotation applications. It features low friction characteristics and excellent axial stiffness, enabling it to withstand loads during high-speed operation while minimizing energy loss.
6. Dust and water resistance: The bearings are designed with double metal shields to effectively prevent dust and debris from entering the bearing, providing additional protection and extending the service life.
In summary, This is a high-performance bearing with a small size, suitable for various miniature applications. It provides stable and reliable rotational performance, and it features dust and water resistance.
| Model |
Dust cover type |
Inner Diameter (mm) |
Outer Diameter(mm) |
Width(mm) |
| MR84 |
ZZ |
4 |
8 |
3 |
| 684 |
ZZ |
4 |
9 |
4 |
| MR104 |
ZZ |
4 |
10 |
4 |
| 694 |
ZZ |
4 |
11 |
4 |
| 604 |
ZZ |
4 |
12 |
4 |
| 624 |
ZZ |
4 |
13 |
5 |
| 634 |
ZZ |
4 |
16 |
5 |
| MR85 |
ZZ |
5 |
8 |
2.5 |
| MR95 |
ZZ |
5 |
9 |
3 |
| MR105 |
ZZ |
5 |
10 |
4 |
| 685 |
ZZ |
5 |
11 |
5 |
| 695 |
ZZ |
5 |
13 |
4 |
| 605 |
ZZ |
5 |
14 |
5 |
| 625 |
ZZ |
5 |
16 |
5 |
| 635 |
ZZ |
5 |
19 |
6 |
| MR106 |
ZZ |
6 |
10 |
3 |
| MR126 |
ZZ |
6 |
12 |
4 |
| 686 |
ZZ |
6 |
13 |
5 |
| 696 |
ZZ |
6 |
15 |
5 |
| 606 |
ZZ |
6 |
17 |
6 |
| 626 |
ZZ |
6 |
19 |
6 |
| 636 |
ZZ |
6 |
22 |
7 |
| MR117 |
ZZ |
7 |
11 |
3 |
| MR137 |
ZZ |
7 |
13 |
4 |
| 687 |
ZZ |
7 |
14 |
5 |
| 697 |
ZZ |
7 |
17 |
5 |
| 607 |
ZZ |
7 |
19 |
6 |
| 627 |
ZZ |
7 |
22 |
7 |
| 637 |
ZZ |
7 |
26 |
9 |
| MR128 |
ZZ |
8 |
12 |
3.5 |
| MR148 |
ZZ |
8 |
14 |
4 |
| 688 |
ZZ |
6 |
14 |
5 |
| 698 |
ZZ |
8 |
19 |
6 |
| 608 |
ZZ |
8 |
22 |
7 |
| 628 |
ZZ |
8 |
24 |
8 |
| 638 |
ZZ |
8 |
28 |
9 |
| 689 |
ZZ |
9 |
17 |
5 |
| 699 |
ZZ |
9 |
20 |
6 |
| 609 |
ZZ |
9 |
24 |
7 |
| 629 |
ZZ |
9 |
26 |
8 |
| 639 |
ZZ |
9 |
30 |
10 |
Applications and Characteristics of Miniature Bearings:
1. Electronic devices: Miniature bearings are commonly used in fans, motors, hard disk drives, printers, scanners, and other electronic devices. They support rotating components and ensure the smooth operation of the equipment.
2. Model making: Miniature bearings are often used in the field of model making, such as model airplanes, cars, and ships. They provide smooth rotational motion, enhancing the details and realism of the models.
3. Medical equipment: Miniature bearings play a crucial role in medical devices such as surgical instruments, diagnostic equipment, and drug delivery systems. They require high precision, low noise, and long life characteristics.
4. Robotics: Miniature bearings are widely used in robotics for joints, drive systems, and sensors. They provide smooth motion and precise positioning control, supporting the movement and operation of robots.
5. Automation equipment: Miniature bearings are commonly used in automation equipment such as conveyors, transfer systems, and linear guides. They can withstand high speed, high load, and continuous operation requirements.
Characteristics:
1. Small size: Miniature bearings have compact dimensions, allowing them to be installed and operated in limited spaces. This makes them highly useful in applications that require compact designs.
2. High-speed operation: Miniature bearings can withstand high-speed rotation, providing stable motion performance and low friction characteristics. This is essential for applications that require fast rotational speeds.
3. High precision: Miniature bearings feature high precision manufacturing and dimensional control to ensure stable operation and precise positioning control.
4. Durability: Despite their small size, miniature bearings still have high load capacity and durability. They can withstand high pressure and long-term operation without damage.
5. Low noise: Miniature bearings are often designed for low-noise operation to meet the requirements of noise-sensitive applications such as office equipment and medical devices.
In summary, miniature bearings play a crucial role in various applications, offering small size, high-speed operation, high precision, durability, and low noise characteristics.
Here are the installation instructions for miniature bearings:
1. Preparation: Before installing the miniature bearings, ensure that the work area is clean and tidy, and have the necessary tools and equipment ready. Check the bearings and bearing housings for compliance and make sure they are not damaged or contaminated.
2. Cleaning and lubrication: Use a solvent and a soft cloth to clean the bearings and bearing housings, ensuring they are free from dust, grease, or other contaminants. Then, apply an appropriate amount of suitable lubricant to the bearings and bearing housings before installation.
3. Positioning the bearings: Carefully place the miniature bearings into the grooves or holes of the bearing housings, ensuring proper alignment and placement. Ensure there are no gaps between the bearing housings and the bearings and that the connection between the bearing housings and other components is correct.
4. Securing the bearings: Depending on the specific situation, use screws, dowel pins, press-fitting, or other appropriate methods to securely fasten the bearings to the shaft or housing. Ensure the chosen method of fixation is secure and reliable, following relevant installation guidelines.
5. Inspection and testing: After installation, carefully inspect the positioning and fixation of the bearings, ensuring they are not loose or misaligned. Perform some simple manual rotation tests to ensure the bearings rotate freely and operate normally.
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