Maintenance Strategies For Universal-joint Cross-head Bearings

By Author: Yogendra Shinde
Total Articles: 266
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Lubrication is essential for nearly every technical part. There are several types of lubricants. Therefore choosing the right lubricant for the products becomes quite essential. Universal-joint cross-head bearings must be lubricated with gear oil. Nevertheless commonly, these kinds of bearings are lubricated with grease. Actually, it is completely wrong to use this lubricant which can cause earlier harm to many cross shaft needle bearings.

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Whenever dismounting, you will find that shaft neck and also the needle severely lacks of oil. Why does this phenomenon show up? It is because that the lubricating nozzle of universal-joint cross-head needle bearings is a common grease nipple. And individuals will misunderstand that they ought to be filled with grease. In fact, it is actually ...
... very difficult to lubricate the fine needles with a grease gun.

Whenever examine the lubrication impact towards the cross shaft needle bearings, the gear oil is a lot superior to the actual Albany grease. The particular reasons are various. First of all, the universal-joint may have large torque and cyclic loading, but the oil slick of Albany grease will not be tough enough. Therefore, it can not form a good oil slick at the friction surface between the bearing as well as the shaft neck.

Second of all, the universal-joint cross-head needle bearings can not rotate along with the steel bowl and cross shaft neck any time at work. The rolling ability of the Albany grease is inadequate, so the new film can not be formed immediately after the destruction of the old one.

Thirdly, the Albany grease is a combination of oil and calcium soap. Whenever it is actually used, because of the lubricant evaporation and deterioration, the Albany grease will become a hard calcium soap that lacks a lubricating effect itself. Apart from this, it also hinders needle rollers to roll on the shaft neck. All of these greatly accelerate the wear of the bearing products.

So as to change this wrong technique and extend the service life of universal joint cross-head needle bearings, the following maintenance techniques are suggested.

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Firstly, you need to remove the needle bearings and clean them thoroughly. And then clear all the residual grease (boiled or washed with the gasoline). After that, you may soak them into the gear oil for about 2min-l0min, and then it is possible to set them up.

Additionally, you can use the special hydraulic filling equipment to lubricate the universal-joint cross-head needle bearings consistently.