Key Advantages
The rubber contact seal effectively retains grease within the bearing, maintaining consistent lubrication over long operating cycles. This reduces the need for frequent relubrication and simplifies long-term equipment maintenance, especially in automated lines and hard-to-access installations.
With enhanced protection against dust, moisture, and light oil contamination, the RS seal prevents premature wear, scoring, and fatigue inside the raceway and rolling elements. This makes the bearing particularly reliable in harsh or dusty environments where non-sealed or shielded bearings tend to degrade more quickly.
ZWZ's precision-formed seal design balances effective sealing with controlled friction and heat generation. Even with the contact-style seal, the bearing maintains stable running performance, supports efficient power transmission, and helps reduce energy consumption in motors and machinery.
The pre-sealed structure also speeds up installation and assembly. No additional sealing components or complex positioning is required, making these bearings easy to mount in standard housings while ensuring stable positioning and consistent performance.
Typical Applications
These bearings serve a wide range of industrial and automotive applications, including:
● AC and DC motors used in general industrial machinery
● Centrifugal, hydraulic, and vacuum pumps
● Automotive wheel hubs, alternators, water pumps, and transmission systems
● Conveyor systems, packaging machines, assembly lines, and automation equipment
● Household appliances such as washing machines, fans, air conditioners, and vacuum cleaners
They are well-suited for continuous-duty operation in both industrial and automotive environments where reliable performance and low maintenance are required.
Technical Parameters
|
Model |
d (mm) |
D (mm) |
B (mm) |
Cr (N) |
CoR (N) |
Limiting Speed (grease, rpm) |
Weight (kg) |
|
6205-RS |
25 |
52 |
15 |
14300 |
8000 |
8500 |
0.130 |
|
6206-RS |
30 |
62 |
16 |
19500 |
11300 |
10000 |
0.214 |
|
6207-RS |
35 |
72 |
17 |
26000 |
14700 |
6300 |
0.296 |
|
6208-RS |
40 |
80 |
18 |
29500 |
17600 |
6300 |
0.385 |
|
6209-RS |
45 |
85 |
19 |
33700 |
20700 |
5300 |
0.441 |
|
6210-RS |
50 |
90 |
20 |
35600 |
22300 |
4800 |
0.498 |
|
6306-RS |
30 |
72 |
19 |
28400 |
15400 |
6300 |
0.353 |
|
6308-RS |
40 |
90 |
23 |
41000 |
24000 |
5000 |
0.643 |
|
6309-RS |
45 |
100 |
25 |
53000 |
30000 |
4500 |
0.853 |
Frequently Asked Questions
Q: Can RS bearings be used in high-speed applications?
A: Yes, they are suitable for high-speed operation within their rated speed range. The contact seal design does impose a moderate speed limit compared to open or shielded bearings, but they still perform reliably in most standard high-speed machinery.
Q: How does the RS seal reduce maintenance?
A: The contact seal blocks dust, dirt, and moisture from entering the bearing interior, which reduces contamination-related wear and extends lubricant life. This lowers the frequency of relubrication, inspections, and replacement, directly cutting maintenance time and costs.
Q: Can RS bearings support axial loads?
A: Yes, in addition to radial loads, they can accommodate moderate axial loads in both directions, making them versatile for common shaft support arrangements.