WGB-2
WGB-2 Marginal Self- lubricating Bearings，It is a sliding bearing made of high-quality cold-rolled steel plate as the base body, porous spherical bronze powder sintered in the middle, and then a layer of modified polyoxymethylene is rolled on the surface of the porous spherical bronze powder layer and rolled. Because of the rolling oil storage pits with spiral angles on the surface of this type of bearing, it needs to be filled with lubricating grease during assembly. It is especially suitable for occasions where it is difficult to form fluid lubrication under high load and low speed. The holes can ensure the best grease distribution and can be maintained without refueling for a long time.
Application
Pedal assembly, balance bushing, brake caliper, steering king pin bushing and truck tail plate bushing, truck, crane, truck crane, forest machinery, packaging machinery, construction machinery, hydraulic motor, agricultural machinery, mining machinery, metallurgy Machinery, water conservancy machinery, automobile and locomotive, steel rolling industry, etc. Pedal assembly, balance bushing, brake caliper, steering king pin bushing and truck tail plate bushing, truck, crane, truck crane, forest machinery, packaging machinery, construction machinery, hydraulic motor, agricultural machinery, mining machinery, metallurgy Machinery, water conservancy machinery, automobile and locomotive, steel rolling industry, etc.
The main factors affecting life
1:Load P: The greater the load, the shorter the bearing life; in any case, the maximum load cannot exceed the theoretical maximum allowable load value.
2:Speed ??V: The higher the speed, the shorter the service life of the bearing; in any case, the maximum sliding speed cannot exceed the theoretical maximum allowable value.
3:PV value: The working life of the bearing depends on the PV value, that is, the product of the actual load P and the sliding speed V. The smaller the PV value, the longer the bearing life.
4:Temperature: The life of the bearing also depends on the temperature when the bearing is used. The higher the temperature, the shorter the service life of the bearing. Therefore, the heat dissipation characteristics of related components should be considered when designing and selecting.
5:Surface roughness of grinding parts: For grinding parts, alloy steel or hard chromium-plated shafts are used. When the surface roughness Ra=0.4-0.63 range, the service life of the bearing can be significantly improved.
6:Other factors such as the design of the bearing seat and lubrication conditions.
Wear resistance
WGB-2 The wear characteristics of WGB-2 under grease lubrication conditions, as shown in the right figure：
its "running-in" wear rate is very small; as can be seen from the line segment in the figure, when the grease applied during assembly is consumed to a certain extent, its wear rate Gradually increase, as shown by the dashed line 1; if the oil is added again before the wear rate increases, the wear rate will remain stable; when the oiling interval is appropriate, the service life of the material can be greatly extended. The refueling interval depends on the cumulative amount of wear. For grease lubrication: when the ambient temperature is below 80℃, lithium soap-based grease is recommended; when the ambient temperature is above 80℃, it is recommended to use silicone oil-based grease; grease containing EP additives is not recommended.
Tech. Data
|
Relevant data |
WGB-2 |
WGB-2Y |
WGB-2S |
WGB-2L | |
| Max. Load | Static |
250 |
250 |
250 |
250 |
|
|
Dynamic |
140 |
140 |
140 |
140 |
| Temp. limit | MIN? |
-40 |
-40 |
-40 |
-40 |
|
|
Max |
130 |
130 |
130 |
130 |
| Dry running | Max. Sliding Speed? |
2.5 |
2.5 |
2.5 |
2.5 |
|
|
Max. PV |
2.8 |
2.8 |
2.8 |
2.8 |
|
|
Friction coefficient |
0.05-0.20 |
0.05-0.20 |
0.05-0.20 |
0.05-0.20 |
