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Teach You How To Choose The Lubrication Method Of NSK Bearings

Source: FAG bearings  Tags: News

There are two ways to choose NSK bearing lubrication: oil lubrication and grease lubrication. There are advantages and disadvantages to these two lubrication methods.


Grease Lubrication

Generally rolling NSK bearings are lubricated with grease. The main advantages are:

The design is very simple
Grease can play a great role in sealing
Low maintenance cost and long service life

Under normal working and environmental conditions, grease may achieve "lifetime lubrication". If under high load conditions (speed, temperature, load), the grease must be changed regularly. In order to replace the grease, it is necessary to set up a pipe to supply and remove grease and a used grease collector to collect used grease. For the case of changing grease in a short period, the necessary pumps and valves for grease injection should be installed.

Oil Lubrication

When the mechanical parts near the NSK bearing have been lubricated with oil or need to rely on lubricating oil to dissipate heat, the NSK bearing should be lubricated with oil. When the NSK bearing is under heavy load or high speed, or when external heat is introduced, there may be heat dissipation requirements.

1. Adopt micro-lubrication method, such as oil drip lubrication, oil mist lubrication or oil-air lubrication, to ensure that the oil stirring loss and NSK bearing friction are very small.

2. When air is used as the carrier, it can directly supply oil and make the airflow help to seal.

3. Where NSK bearings have extremely high speeds and require good cooling of the suburban fruit, a large amount of lubricating oil can be sprayed directly to all contact surfaces.

4.It is very important to keep NSK bearings lubricated and clean

Before we inspect the bearings, we should first clean the surface of NSK bearings, and then carefully check the oil seals of NSK bearings and the surrounding parts. If they already show bad symptoms, they must be replaced. Bad oil seals will cause damage The cloud shape of the NSK bearing is abnormal and the equipment is shut down.

Also check the lubricant of NSK bearings

Lubrication is very important, not only for NSK bearings, but also for all bearings. But please note that Japan NSK bearings should not add too much grease. Then the lubricant of the NSK bearing is replaced. NSK bearings lubricated with engine oil should be filled with fresh engine oil and let the machine rotate at low speed for a few minutes if the old engine oil has been removed. As much as possible, let the engine oil collect the remaining pollutants, and then drain off the engine oil. When replacing grease with NSK bearings that are lubricated with grease, the Qiao remover used should avoid any contact with NSK bearings with cotton. Because these residual fibers may be wedged between the rolling elements and cause damage, especially the application of small bearings needs to pay attention to this problem.

Note that covering the exposed NSK bearings

When inspecting NSK bearings, do not expose the bearings to contaminants or moisture. If the work is interrupted, the machine should be covered with oil paper plastic sheets or similar materials. If the unshielded bearings are cleaned without disassembly and inspection may be carried out, clean with a coating brush dipped in petroleum solvent, and then dry with a lint-free cloth or blow dry with compressed air Do not let the bearing assembly start to rotate). Use a small mirror and a probe similar to that used by a dentist to inspect the bearing's track surface, retainer and beads. Do not clean the bearing with sealing cover or dustproof; just wipe the external surface. If the bearing is damaged, it needs to be replaced. It is much more economical to replace the bearings during the period of regular shutdown maintenance than the sudden shutdown due to damage caused by the array.