Teach you how to choose the lubrication method of NSK bearing

There are two ways to select NSK bearings for lubrication: oil lubrication and grease lubrication. There are advantages and disadvantages to each of these two lubrication methods.

Grease lubrication

Generally rolling NSK bearings are greased. Its main advantages are:

Design is very simple

Grease can seal a lot

Low maintenance costs and long service life

Under normal working and environmental conditions, it is possible for oils to achieve “lifetime lubrication”. If under high load conditions (speed, temperature, load), the grease must be replaced periodically. In order to replace the grease, it is necessary to set up pipes for supplying and removing grease and collecting used grease collectors. For short-term grease replacement, the necessary grease-injected pumps and valves should be provided.

Oil lubrication

NSK bearings should be oil lubricated when the mechanical parts near the NSK bearing have been lubricated with oil or need to be dissipated by lubricating oil. There may be heat dissipation requirements when the NSK bearing is under heavy load or high speed, or when external heat is introduced.

Micro-lubrication methods, such as drip lubrication, oil mist lubrication or oil-air lubrication, ensure that the oil loss and the NSK bearing friction are small.

When air is used as the carrier, the oil can be supplied directly and the gas flow helps to seal.

NSK bearings are extremely fast and require good cooling of the fruit, allowing a large amount of lubricant to be sprayed directly onto all contact surfaces.

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

Before we inspect the imported bearings, we should clean the surface of the NSK bearing, and then carefully check the oil seal of the NSK bearing and its surrounding parts. If it has been shown to be bad, be sure to replace it. Poor oil seal will cause damage. The NSK bearing cloud is abnormal and the equipment is shut down.

2. We also check the lubricant of NSK imported bearings

Lubrication is very important, not only for NSK bearings, but also for all imported bearings. However, please note that Japan NSK bearings should not add too much grease. Then it is to replace the lubricant of the NSK bearing. NSK bearings lubricated with oil should be refilled with fresh oil and allowed to rotate at low speed for a few minutes if the old oil is drained. As much as possible, allow the oil to collect the contaminants from the wreckage and then vent the oil. When using a grease-lubricated NSK bearing to replace grease, the cutter used should avoid any contact with cotton material in any part of the NSK bearing. Since these residual fibers may be wedged between the rolling elements and cause damage, especially the application of small bearings requires attention to this problem.

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The difference between SKF bearing vibration type and common type

The ferrule of the vibrating SKF bearing and the shaft or the seat hole require a certain transition fit or interference fit. When the interference size is SKF bearing under load, the mating surface of the SKF bearing ring on the shaft or the seat hole There is no "squirming" phenomenon on the principle.

First, let's talk about the SKF bearing vibration type. The inner and outer rings and rolling elements of the SKF bearing vibration type use vacuum degassing bearing steel, which has good fatigue resistance. Moreover, the cage is made of aluminum-iron-manganese bronze material, which has high strength, good elasticity and better wear resistance.

Second, let's look at the ordinary type of SKF bearings. SKF bearings are made of ordinary bearing steel for the inner and outer rings and rolling elements. There is also a cage made of zinc brass, which has low strength and poor elasticity.

So, how to choose SKF bearing vibration type or SKF bearing common type? The following three points are available for reference:

1 Fixed load, fixed load is characterized by a synthetic radial load vector and the ferrule is relatively stationary.

2 Rotating load, the characteristic of the rotating load is that the synthetic radial load vector rotates relative to the ferrule.

3 oscillating load and variable load, oscillating load is the load that is synthesized by rotating load much smaller than fixed load. The oscillating load means that the load applied to some ferrules may sometimes be a rotating load, sometimes a fixed load, and sometimes a oscillating load.

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