Four Key Features of the Rolling Element Bearing Lubricant

Many mechanical products are used in the industrial sector, and a slewing bearing is a crucial mechanical component found in many of these products. Proper lubrication is essential for the effective use of slewing bearings. Below, we introduce the four key characteristics of slewing bearing lubricants.

Feature 1: The lubricating oil for slewing bearings must possess excellent performance. When the machine tool spindle uses a circulating lubrication method, the requirement is for the bearing oil to maintain its quality over a long period of use, hence the need for excellent performance.

Feature Two: The lubricating oil for slewing bearings requires an appropriate viscosity and good viscosity-temperature characteristics to prevent excessive temperature in the machine tool spindle, which could lead to thermal deformation of the machine tool, affecting machining accuracy or poor bearing lubrication. The selection of lubricating oil with the appropriate temperature should be based on the spindle bearing structure, rotational speed, and bearing clearance, and it must have good viscosity-temperature characteristics to prevent excessive changes in viscosity due to significant variations in the spindle operating temperature and environmental temperature, which could impair its lubrication performance.

Feature three: The lubricating oil for the slewing bearing must have excellent anti-rust properties. Due to the inevitable mixing of condensed water from the air or machine tool coolant into the main shaft lubrication system during the operation of the oil, it is required that the oil have good anti-rust properties.

Feature Four: The lubricating oil for the return roller bearing must possess excellent lubricity. To maintain a uniform oil film between the main shaft and bearing contact surfaces, and to ensure that the oil film does not break during the start or stop of the main shaft's movement, which generates impact loads, maintaining good lubricating performance is crucial for reducing friction and friction heat, lowering the temperature rise of the main shaft, and ensuring precision in processing. It is required to have good lubricating performance.

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