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There Are 11 Ways To Lubricate A bearing. How Many Do You Know?

There Are 11 Ways To Lubricate A bearing. How Many Do You Know?
Issue Time:2019-09-18

There Are 11 Ways To Lubricate A bearing. How Many Do You Know?


Bearing lubrication is to enable the bearing to operate normally, avoid the direct contact between the raceway and the surface of the rolling body, reduce the friction and wear inside the bearing, extend the service life of the bearing, enhance the performance of the bearing, but also to prevent foreign matter from intruding into the bearing and causing rust and corrosion.


1. Manual lubrication

This is the most primitive method, in the case of insufficient lubricating oil bearing, oil supply with oiler. But this method is difficult to maintain a certain amount of oil, because the risk of forgetting refueling is greater, usually only used for light load, low speed or intermittent movement occasions, the best operation, the refueling hole set dust cover or ball valve, with felt, cotton, wool as a filter device.

 Manual lubrication

2. Drop point lubrication

Usually used for bearing with circumferential speed less than 4-5m /s, light load and medium load, from the container through the hole, needle, valve and other lubricating oil supply is roughly quantitative, the most classic is the drop oil cup, drop oil amount with lubricating oil viscosity, bearing clearance and the location of the oil supply hole has significant changes.


3. Oil ring lubrication

By hanging on the shaft and can rotate the ring to the oil pool lubrication bearing (can only be used for horizontal shaft lubrication method), suitable for bearing diameter greater than 50mm medium speed and high speed bearing, the oil ring preferably seamless, bearing diameter ratio less than 2, can only use one oil ring, otherwise need two oil rings.

 Oil ring lubrication

4. Rope lubrication

Relying on the capillary and siphon function of the oil rope, the lubricating oil in the oil cup is introduced into the bearing, which is mainly used for light and medium bearing with circumferential speed less than 4-5m /s. In addition, the oil rope can play a filtering role in the whole process.


5. Oil pad lubrication

Use the capillary action of oil cushion, the lubricant in oil pool besmears shaft neck surface, this method can make friction surface often maintains cleanness, but dust also can block wool pore to cause oil to be short of. The oil supply for pad lubrication is usually only 1/20 of that for oil lubrication.

 Oil pad lubrication

6. Oil bath lubrication

This lubrication method is a part of the bearing immersed in lubricating oil, often used for the vertical shaft thrust bearing, but not for horizontal shaft radial bearing.


7. Splash lubrication

The lubricating oil is supplied to the bearing by the blow of rotating parts in the oil tank. It is suitable for bearings with higher speed.

 Splash lubrication

8. Spray lubrication

The method of spraying lubricating oil on the friction surface after atomizing is suitable for high-speed bearing.


9. Pressure oil supply for lubrication

Supply oil to the bearing by the pressure of the lubrication pump, and recycle the lubricating oil flowing from the bearing to the oil pool for recycling. It is the most stable lubrication method with the largest amount of oil supply. It is suitable for high-speed, heavy load and important sliding bearings.

  Pressure oil supply for lubrication

10. Circulating oil lubrication

Filter oil will be transferred to the bearing parts with the oil pump, through the bearing after the lubricating oil and then filter cooling use. Because the circulating oil can take away a certain amount of heat and cool the bearing, the method is suitable for bearing parts with higher rotating speed.


11. Jet lubrication

The high pressure oil is injected into the bearing through the nozzle with the oil pump, and the injected oil flows into the oil groove through the other end of the bearing. When the bearing rotates at a high speed, the rolling body and the cage also make the surrounding air form airflow at a relatively high rotation speed. It is difficult to send the lubricating oil into the bearing by normal lubrication method. At this time, the lubricating oil must be sprayed into the bearing by high-pressure injection method, and the nozzle position should be placed between the inner ring and the center of the cage.


Bearing lubrication is a continuous work, lubricating oil replacement cycle based on the use of bearing conditions and the amount of oil. Under normal circumstances, when the operating temperature is below 50and the good environment with less dust is used, replace it once a year. When the oil temperature reaches 100, replace it for 3 months or less.

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