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How doball bearingswork

Thanks for the advice.  I should have specified, rotor tilt is the issue.  I’ll give the oil and tweezer approach a try, seems like the way to go.  This is probably my 15th or so movement, and it’s running great except for this.  Thanks again!

Ballbearing examples

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BallBearing Balls

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What are ball bearings used forin cars

With continuous use in both old and new applications, improvements in lubrication have helped to extend the life of ball bearings. This has helped to reduce the need for maintenance and replacement. Some ball bearings are sealed and therefor do not require lubricant. Ball bearings that do require lubricant typically use grease.

Since ball bearings have proven to do their job well and are also fairly easy to manufacture, they are used in many products and applications. Part of our everyday life, ball bearings are found in things such as blenders and exercise equipment. The list goes on and on. Bicycles, DVD players, water pumps, washing machines and fans are just a few of many day to day products that we use that use ball bearings.

A radial load, as in a pulley, simply puts weight on the bearing in a manner that causes the bearing to roll or rotate as a result of tension. A thrust load is significantly different, and puts stress on the bearing in an entirely different way. If a bearing (think of a tire) is flipped on its side (think now of a tire swing) and subject to complete force at that angle (think of three children sitting on the tire swing), this is called thrust load. A bearing that is used to support a bar stool is an example of a bearing that is subject only to thrust load.

Ballbearing diagram

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Should  not  punch a bearing in place, just tweeze it in, in a pair of stout tweezers. Oiling inside the rotor hole, reduces the friction when inserting the bearing.

You say you are pretty new to watch repair and this is an asjusted good grade movement, a lower grade movement would have been more suitabke to work on.

Arguably the most common type of bearing, ball bearings are used in a wide variety of products and applications. From hard drives to skateboards, ball bearings are designed to handle both thrust and radial loads. However, ball bearings are usually found in applications with smaller loads.

This ball bearing is actually a pully in groove of which steel balls roll, lower rim of the pully isn't fixed so when tapped ( even gently)  can  move, as a result upper& lower rims push on the steel  balls, thus the bearing doesn't swing as freely as a new bearing should. A rotor fitted with new ball bearings should swing for 30 seconds when hung on a piece of pegwood.

Roller bearing

What are ball bearings used forin everyday life

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So I’m almost done with my project ETA 2830, only thing left is fixing a loose rotor. I installed a new rotor bearing, and it seems to be only slightly better than the old one. This is the first time I've replaced a bearing, but feel like I was quite gentle tapping in the new one with a staking set. Any ideas what I might have messed up before I order yet another bearing?

In order to serve all these functions, bearings make use of a relatively simple structure: a ball with internal and external smooth metal surfaces, to aid in rolling. The ball itself carries the weight of the load—the force of the load’s weight is what drives the bearing’s rotation. However, not all loads put force on a bearing in the same manner. There are two different kinds of loading: radial and thrust.

Ballbearing types

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Ball bearings work by transferring the load from the outer race to the ball and on to the inner race. Everything is able to spin smoothly since the spherical shape of the ball only touches the inner and outer race at very small points. However, this can also be a hindrance as well if the bearing is not used properly. Because of the small area of contact that is holding a particular load, the balls may become deformed and ruin the bearing if it becomes overloaded.

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Found in a wide variety of applications of all shapes, sizes and complexity, ball bearings continue to be a cost effective solution for a diverse portfolio of industries and products.

Aside from everyday objects, ball bearings are also used in more technologically advanced applications as well. For example, the Hubble telescope, the Mars Rover and weather satellites all use ball bearings.