Posts Tagged ‘bearing’

How To Change A Snow Blower Bearing?

Friday, December 8th, 2017

If you have a snowblower that is more than 5-7 years old, that is when wear and tear and rust will start to affect the machine. If the snowblower doesn’t have any propulsion, no matter what gear you put it on, you may want to take a look at the friction discs and the snowblower bearing. There is a good chance that the machine may have a bad snowblower bearing. Hence, it is a good practice to inspect the bearing of the machine whenever you replace the belts or take the machine apart for any other reason.

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Smallest Ball Bearings vs Largest (Part 2)

Friday, September 4th, 2015

Last week, we focused on the world’s tiniest ball bearings, and what they are used for.

Today, we’ll shine the spotlight on the giants of the ball bearing world, and detail for you what types of applications they are used for.

In my quest for the largest ball bearing in the world, I came upon a few interesting results.

One, was the ball bearing stationed outside the SKF headquarters building in Gothenburg, Sweden. There sits an enormous, steel-looking ball, representing the company with its statuesque presence.

The second, was the Californian Benecia-Martinez Bridge, which I’ll go into more detail about now.

The Benecia-Martinez Bridge

This is actually the name for three parallel bridges spanning the Carquinez Strait from North Benecia to Suoth Martinez, in California.

It was built in 1962 to replace car ferry services across the water, and features some amazing bearing action.

Each bearing is at least 12 feet in diameter, and weighs 40,000 to 50,000 pounds. Talk about some XXXL bearings!

And, when earthquakes hit, these magnificent bearings can allow for up to six feet of horizontal movement with little to no structural displacement. That’s unparalleled.

Making the bridges durable and safe during seismic activity cost around $122 million. Now the bridges are complete with a seismic monitoring system, seismic isolation bearings, steel joints, and expansion hinges.

So, how much larger are these bearings in comparison with the miniature bearings we talked about last week?

If the bearings are 12 feet in diameter, that comes out to 8,000 times greater than miniature bearings having 1.5 mm outside diameters. Wow!

Large Bearing Manufacturing

The manufacturer I found as having the capability of producing the largest bearings, at least here in the U.S. is Messinger Bearing, out of Philadelphia, PA.

Open since 1912, Messinger Bearings specializes in designing and manufacturing bearings suited for the steel, coal pulverizing, stacker, reclaimer and tunnel boring industries. They have the capability to manufacture bearings up to 25 Feet in diameter.

According to Messinger, the largest bearing they have created so far has been 18 feet in diameter. That’s 12,000 times greater than the smallest miniature bearings with their 1.5 mm outside diameters.

Messinger transports these gigantic bearings on flatbed trucks, mounted to an A frame standing upright, and escorted by the authorities.

In case you were wondering, these mega bearings can put you back anywhere from $100-$300,000, depending on the exact needs and specifications.

Applications for these large bearings are: cranes, steel mills, draglines, tunnel boring, and more.

Now, isn’t that somethin’?

We hope you learned a thing or two about the world’s tiniest and largest bearings, what they do, and how they’re made.

Bearings continue to surprise us as innovative and useful tools in the modern age.

Is synthetic oil lubrication recommended for tapered roller bearings?

Friday, July 19th, 2013

Q: Do you recommend synthetic oil lubrication for tapered roller bearings? 

A: The usage of synthetic lubricants with tapered roller bearings is generally OK, assuming the lubrication has the right additives for your specific application requirements. There are cases wherein synthetic greases are superior to petroleum-based oils when it comes to their capacity to fight breakdown from mechanical and thermal conditions.

Nevertheless, it is good advice to always consult the original equipment manufacturer in regards to any change from a lubricant that is specified by them. Before you opt for synthetic oil grease for your application, touch base with your sales or service engineer so you can rest assured it is acceptable in your application.

There is oil separation in my grease. Is it still OK?

Friday, April 5th, 2013

Yup, you can still use it. Some oil separation or puddle formation that you may observe on top of grease in containers like drums or pails are not unusual, so no worries there. Keep in mind that grease lubricates a bearing by means of oil to the bearing contact. That said, releasing oil is a necessary function.

For the most part, the amount of oil separation is not very important when compared with the mass of grease in the container. Typically, you can safely stir back the separated oil into the bulk of the grease in the pails or drums. It has been observed that you can lessen most of these time-related oil separations if you keep the surface of the grease smooth during storage (i.e., avoid leaving “craters” in the grease).

The grade or consistency of the grease is actually linked to oil separation. The lighter the grease grade, the more likely it will become to oil bleed. Lastly, oil bleed can be affected by large fluctuations in storage temperature. Therefore, you must always keep storage temperatures as consistent as possible.