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617/8 678 ZZ Minature Deep Groove Ball Bearings 8mm X 12mm X 3.5mm Thin Section Robot Bearings
617/8 678 ZZ Minature Deep Groove Ball Bearings 8mm X 12mm X 3.5mm Thin Section Robot Bearings
The 678 ZZ miniature deep groove ball bearing, with dimensions of 8mm inner diameter × 12mm outer diameter × 3.5mm width, is renowned for its compact size, high-speed capability, and low noise characteristics.
678 ZZ Ball Bearings 8X12X3.5mm Specifications & Dimensions
| Universal |
678 ZZ |
| Type |
Deep Groove Ball |
| Inner/Outer Ring/ Ball Material |
Chrome Steel |
| Cage Material |
Steel/Nylon |
| CageType |
Punching |
| Precision |
P0,P6 |
| Inner Dimension d(Ø)(mm) |
8 |
| Outer Dimension D(Ø)(mm) |
12 |
| Width B (or T)(mm) |
3.5 |
| Lubrication |
Grease |
| Load Direction |
Radial |
| Specifications/Environment |
Standard |
| Number of Raceway Ring Rows |
Single Track |
| Size Standards |
Metric Series |
The 678 ZZ miniature deep groove ball bearing is widely used across various specialized fields due to its compact size and high precision. Application areas include:
1. Office Equipment and Electronics
Personal Computers (Desktop/Laptop), Printers, Copiers, ATMs: Used in spindles or transmission components of these devices.
Cameras, Projectors: Employed in the rotating structures of precision optical equipment.
2. Household Appliances
Air Conditioners, Vacuum Cleaners, Power Tools (e.g., drills, angle grinders): Utilized in motor or fan components.
Smart Home Devices (e.g., robotic vacuum cleaners): Applied in the drive units of some smart home appliances.
3. Automotive Industry
Electrical Control Systems (e.g., wiper motors, window regulators), Sensors: Used in miniature mechanical parts within automotive electrical control systems.
Onboard Electronic Devices (e.g., dashboards, navigation systems): Found in auxiliary transmission structures of vehicle electronics.
4. Industrial and Precision Instruments
Fishing Reels, Textile Machinery (e.g., sizing machines, water jet looms): Applied in miniature transmission systems of fishing reels and textile machinery.
Laboratory Instruments, Medical Devices (e.g., centrifuges, micropumps): Used in high-precision rotating components of laboratory instruments and medical devices.
5. Emerging Technology Fields
Gimbals, Drone Motors: Ideal for lightweight design requirements in applications like gimbal stabilizers and drone motors.
Robot Joints, Miniature Actuators in Automated Production Lines: Employed in robot joints and miniature actuators in automation.
Bearing Number |
Boundary Dimensions(mm) |
Basic Load Rating(N) |
Limiting Speed(rpm) |
Reference(kg)
Weight |
| Inner Diameter |
Outer Diameter |
Width |
Chamfer |
Dynamic |
Static |
Grease |
Oil |
| d |
D |
B |
B1 |
r(min) |
Cr |
Cor |
Non-contact |
Wt ≈ |
| 617/3 |
ZZ |
|
3 |
6 |
2 |
2.5 |
0.1 |
242 |
94 |
60000 |
71000 |
0.00020 |
| 617/4 |
ZZ |
|
4 |
7 |
2 |
2.5 |
0.1 |
222 |
88 |
54000 |
63000 |
0.00028 |
| 617/5 |
ZZ |
|
5 |
8 |
2 |
2.5 |
0.1 |
217 |
91 |
49000 |
57000 |
0.00032 |
| 617/6 |
ZZ |
|
6 |
10 |
2.5 |
3 |
0.1 |
465 |
196 |
43000 |
51000 |
0.00065 |
| 617/7 |
ZZ |
|
7 |
11 |
2.5 |
3 |
0.1 |
555 |
269 |
40000 |
47000 |
0.00067 |
| 617/8 |
ZZ |
|
8 |
12 |
2.5 |
3.5 |
0.1 |
515 |
252 |
38000 |
45000 |
0.00075 |
| 617/9 |
ZZ |
|
9 |
14 |
3 |
4.5 |
0.1 |
920 |
465 |
36000 |
42000 |
0.00140 |
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