Archive for February, 2014

Bearing Failure Due to Over Lubrication

Friday, February 28th, 2014

Overlubricating your bearings can cause the balls or rollers to slide along the race rather than turning. Then, the grease could actually churn. This churning mechanism could ultimately bleed the base oil from the grease.

What will remain to lubricate the bearing is a thickened system with little or no lubricating elements. Since there is not enough lubricating oil, and there’s excess heat from the churning, the grease would start to harden. The final outcome is bearing failure and equipment downtime.

The excess grease tends to work its way into the stator body. The rotor assembly will then be distributing the grease all over the windings. It could have a negative impact on the operation of the fan and bring about excessive heat within the motor. Overgreasing can also cause high operating temperatures, collapsed seals, and in the case of greased electric motors, energy loss and failures.

Seal damage is yet another negative side effect of too much lubrication. When there is abundance of pressure from a grease gun caused by overgreasing, the crusty grease tends to be broken apart and goes straight off to the bearing track.

After planning the scheduling of the assets, you must know beforehand the timing and the volume of grease that you have to apply at every point. You calculate the volume using this formula:

G = 0.114 x D x B

Where G = the amount of grease in ounces
D = the bore diameter in inches
B = the bearing width in inches

There are several measures you can take to control overgreasing, though…

  • You should stop greasing when you feel irregular back pressure.
  • Always see to it that you clean the exhaust ports and that they are free of any debris or old, hard crust that could be blocking the passageway.
  • Take into account installing grease guns with pressure gauges, shut-off grease fittings or relief-type vent plugs.
  • Pump grease into bearings every few seconds.  You should be aware that using a quick-lever action could bring about seal damage and not allow the grease to properly distribute throughout the bearing.

 

Timken – Wind Energy Animation

Friday, February 21st, 2014

Wind power refers to the conversion of wind energy into a useful form of energy. One good example would be the usage of wind turbines to yield electrical power, windmills to draw mechanical powers, windpumps for water pumping or drainage, or sails to propel ships.

Wind power is a wonderful substitute for fossil fuels. It’s abundant, renewable, widely distributed, and does not yield greenhouse gas emissions. In any case, it’s more environment-friendly compared to many other power sources.

Wind can be used to do work. The kinetic energy of the wind can be changed into other forms of energy, either mechanical energy or electrical energy.

Here are some Timken roller bearings at work showing how it’s done…

What are the Uses of Oil Seals?

Friday, February 14th, 2014

The job of oil seals, otherwise dubbed as grease, fluid, or dirt seals, is to close gaps between stationary and moving components found in mechanical equipment, and keep lubricant from escaping. Oil seals also prevent contaminants from getting into machinery, especially in severe environments.

As important parts of pretty much all types of machines and running vehicles, oil seals can protect every type of precision-constructed, close-fitting ball, sleeve, as well as roller bearings.

When it comes to precision bearings, oil seals keep lubricants from escaping the bearings or a certain area. While in machine components, oil seals can help keep out abrasives, corrosive moisture, as well as other harmful contaminants. Oil seals also aid in stopping intermixture of two different mediums, specifically lubricating oil and water.

The seals are helpful in a full range of equipment in a wide array of applications, namely automotive, manufacturing, off-highway, oil refineries, as well as power transmission. It’s a must that grease seals match the aftermarket applications or original equipment. By doing so, you can rest assured that your machine’s performance will be optimal and consistent.

Typically, a dirt seal is installed adjacent to the bearing.  It could be sealed in or sealed out, as per requirement of the machinery which relies upon the different kinds of solids, gases, or liquids that come across a specific mechanism.  Therefore, keep in mind that before you choose the lip material or sealing element, determine beforehand the environment that the oil seal will be operating in.

Fluid seals are also made out of several compounds and materials.  It could be from PTFE, tetrafluoro-ethylene propylene, fluoro-elastomer, silicone, polyacrylic or ethylene-acrylic, polyacrylate, nitrile, urethane, leather, as well as felt compounds.

You can avail of industrial type of seals that come in different sizes. You can stumble upon small-bore, ranging from zero to 13 inches.  You can also find high-temperature and metric varieties of grease seals. That said, it’s crucial to know which seal to use for your machinery.

ContiTech Took Action in Fight Against Fake Drive Belts

Friday, February 7th, 2014

The ContiTech Power Transmission Group managed to stop the fake products surfacing everywhere in the United Arab Emirates. Pirated copies of drive belts as well as packaging items with the ContiTech logo have been apprehended from the dealer Asia Tiger Auto Parts LLC and then destroyed.

Those belts were built for the spare parts aftermarket. The head of the Automotive Aftermarket business at the ContiTech Power Transmission Group, Helmut Engel, admitted it was a huge success in their campaign against fake products.

The pirated V-ribbed belts and sleeves had been seized following a raid by the local police and were made useless using a heavy roller. Albeit there were some variations, it’s apparent that the design of the belts and packaging was copied entirely. This was according to Lars Klostermann of the Technical Service department of the ContiTech Power Transmission Group.

Aside from major deviance in terms of the material, you could see other obvious differences compared to the authentic products. This includes the product identification on the belts and the design of the sleeves. The old ContiTech logo could even be seen on some of the packaging items.

For any brand name products it’s always a good idea to buy from authorized partners and reputable dealers. That’s a surefire way for the buyers to know they’re getting authentic product. Pirated copies of belts certainly do not possess the same quality of material and workmanship like that of ContiTech drive belts. If a belt tears, this could end up in pricey engine damage.

Have you ever bought a product that had you questioning its authenticity? Hit us with some comments below.