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Anti Corrosion And Heating Lubrication Methods Of Ntn Rotary Table Bearing

Ntn Rotary Table Bearing

Improper operation can also cause NTN bearing heating. Lubrication can reduce the wear of parts in Ntn Rotary Table Bearing motion, ensure the accuracy of press and reduce energy consumption. Lubrication is divided into thin oil lubrication and thick oil lubrication.

Thin oil lubrication: the advantage is that the internal friction coefficient Ntn Rotary Table Bearing is small, so the energy consumption to overcome the friction is less, the thin oil has good fluidity, is easy to enter the friction surface of each lubrication point, has good cooling effect,

and can take away the impurities adhered to the friction surface and the metal particles produced by grinding. The disadvantage is that the oil film can not bear large unit pressure and has high requirements for sealing. High speed presses generally use large flow of thin oil lubrication, which can take away the heat generated by each friction pair.

Concentrated oil lubrication: it has the advantages of easy sealing, less loss, less affected by temperature, and has a large adaptability to the changes of load properties and movement speed. The disadvantage is poor fluidity and large internal friction coefficient, so the energy loss is large.

When working at high temperature for a long time, the lubrication performance will be lost. In order to improve the properties of Ntn Rotary Table Bearing concentrated oil, 15% ~ 30% mechanical oil is often added to the grease.

The lubricating oil has high viscosity, large bearing capacity, bearing flow / J and high power consumption, so the bearing temperature increases. When the temperature is high, the viscosity of lubricating oil decreases, so it will be limited to increase the bearing capacity of NTN bearing by increasing the viscosity of lubricating oil.

Anti Corrosion And Heating Lubrication Methods Of Ntn Rotary Table Bearing

When using the rotary table bearing, grease is very critical.

The use of deteriorated grease will not only fail to play its due role, but Ntn Rotary Table Bearing also damage the bearing.

1. Oil flow observation method

Take two measuring cups, one containing the lubricating oil to be checked and the other empty on the table. Lift the measuring cup filled Ntn Rotary Table Bearing with lubricating oil 30-40 cm away from the table and tilt it,

let the lubricating oil flow slowly into the empty cup, and observe its flow. The lubricating oil with good quality should flow slender, uniform and continuous. If the oil flow is Ntn Rotary Table Bearing fast and slow, sometimes large pieces flow down, The lubricating oil has deteriorated.

2. Hand twisting

Twist the lubricating oil between thumb and index finger and grind it repeatedly. The better lubricating oil hand feels lubricity, less wear debris and no friction. If it feels a large friction feeling such as sand particles between fingers, it indicates that there are many impurities in the lubricating oil, and the lubricating oil should be replaced.

3. Illumination method

On sunny days, lift up the lubricating oil with a screwdriver at an angle of 45 degrees to the horizontal plane. Observe the oil drops according to the sunlight. In the light, it can be clearly seen that there is no wear debris in the lubricating oil. It is good to continue to use. If there are too many wear debris, replace the lubricating oil.

4. Oil drop trace method

Take a clean white filter paper and Ntn Rotary Table Bearing drop several drops of oil on the filter paper. After the lubricating oil leaks,

if there is black powder on the surface and there is a sense of Ntn Rotary Table Bearing astringency by hand, it indicates that there are many impurities in the lubricating oil. Good lubricating oil has no powder, and it is dry and smooth by hand and shows yellow traces.