When using slewing bearings(www.xzwdslewing.com), many people choose to use grease to lubricate the bearings. Bearing grease is mainly used to reduce the friction coefficient of the bearing and reduce the energy consumption of the bearing during operation, thereby ensuring the accuracy of the press. However, if you use deteriorated grease, not only can it not reduce the friction coefficient of the bearing and improve the performance, but it will cause the temperature of the bearing to rise, and even the signs of damage to the bearing, so we must pay attention when choosing bearing grease. How to judge whether the slewing bearing(www.xzwdslewing.com) grease has deteriorated? There are mainly the following methods to make judgments:

1. Oil flow observation method

Take two measuring cups, one of which contains the lubricating oil to be inspected, and the other empty on the table. Lift the measuring cup full of lubricating oil 30-40 cm away from the table and tilt it to let the lubricating oil slowly flow into the empty cup In the middle, observe its flow, the oil flow of good quality lubricating oil should be slender, uniform and continuous. If the oil flow is sudden and slow, and sometimes large pieces flow down, it is said that the lubricating oil has deteriorated.

2. Hand twist method

Twist the lubricating oil between the thumb and the index finger and grind repeatedly. The better lubricating oil feels lubricating, less abrasive and non-friction. There are many impurities inside, so replace with new lubricating oil.

3. Illumination method

On a sunny day, use a screwdriver to lift up the lubricating oil and make a 45-degree angle to the horizontal. Contrast with sunlight and observe the condition of oil droplets. Under sunlight, you can clearly see that there is no wear debris in the lubricating oil as good, and you can continue to use it. If there are too many wear debris, you should replace the lubricating oil.

4. Oil drop trace method

Take a piece of clean white filter paper, and drop a few drops of oil on the filter paper. After the lubricant leaks, if there is black powder on the surface and it feels obstructive to touch with your hands, it means that there are a lot of impurities in the lubricant. Good lubricant No powder, dry and smooth to the touch by hand, with yellow traces.