You can pick a lubricant that’s best for your application now that you know the operating conditions of oil and grease lubricants. For example, if the operating temperature for the bearings is high and requires faster heat dissipation, opt for oil lubrication. On the other hand, grease provides better seals against contaminants and is ideal for leakage control.

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Lack of bearing lubrication can result in bearing failure. Lubrication helps separate ball or roller bearings from the raceways, minimizing wear and friction. It also helps prevent corrosion and promotes the smooth running of the seals to reduce seal wear. As a result, it improves the effectiveness of the seals in keeping the lubrication within them.

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Grease lubricants have three main components: base oil, thickeners, and additives, such as rust inhibitors. Besides, grease is the better lubrication choice for linear guide and drive applications. That’s because it sticks to the bearing surfaces longer and is better than oil lubricants. Besides, it is less likely to run off or get ejected from rotating parts.

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What are the electrical parameters in series and parallel electrical networks? In our last article, we looked at the principles of operation of electrical cells.  In this article we’re going to move on to the electrical parameters in both series and parallel electrical networks. When we have circuits with more than one resistor, we need […]

Axial loadbearing

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Due to various imperfections of real steel columns, failure due to inelastic buckling occurs before the Euler buckling force. The procedure for determining the buckling load-bearing capacity of a real steel column consists of several steps:

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Now that you know the difference between oil vs grease for bearing lubrication, you must choose an option that matches your applications. However, you must maintain the right amount of lubrication to achieve optimum bearing life. Most importantly, buy high-quality lubricants from a reputable company like Lubchem, oil or grease.

The axial force can’t act centrically on the column, so, in addition, the column is always exposed to bending. As a result of the action of the bending moment, there is a further increase in the bending moment.

Axial loadexample

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Kirchhoff’s current and voltage laws In our last article, we looked at the principles and operation of a d.c motor.  In this article, we’re going to investigate Kirchoff’s current and voltage laws, as well as how to apply them to engineering problems. Kirchoff’s law of  current Kirchoff’s law of current states that the algebraic sum […]

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Oil lubrication is ideal for high-temperature and high-speed applications that require heat transfer away from the moving bearing surfaces. An oil lubricant flows, disperses, and dissipates heat better than grease. Oil lubrications can be synthetic or mineral, depending on the base compound. Besides, they have varying viscosities.

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What are the principles of operation of a DC electric motor? In our last article, we looked at the electrical parameters in series and parallel electrical circuits.  In this article, we’re going to dive into the principles of operation of a DC electric motor. The motor effect When a current-carrying conductor is placed on a […]

Following on from our previous article on evaluating the Euler buckling load, we’re going to look at some other calculations we need when looking at buckling of columns.

There are two types of lubrications for bearing application: oil vs grease. Both are helpful in lubricating rotation bearings to avoid damage due to bearing-to-bearing contact. However, there are a few differences in their applications and elements. For example, grease is oil mixed with thickeners and other additives.

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To consider geometric and material imperfections, dimensionless buckling curves were defined. The figure below shows dimensionless buckling curves.

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Take a 3-meter-long column with one end pinned and the other fixed.  It has a cross-section area of A = 3.125 x 10-3 m2, moment of inertia of I = 4.7526 x 10-5 m4, and a width of 2.20 x 10-4 m3. Column is loaded with NEd = 150 kN at eccentricity of e = 0.02 m.

Let’s check out another example.  We’ll take another 3m long column with one end pinned and the other fixed.  It has a cross-section area A=3.125×10-3 m2 and moment of inertia I=4.75026×10-5 m4. Buckling curve a. Calculate the column buckling resistance for steel grade S235 and E=210 x 109 Pa.