Cylindrical Thrust Bearing

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FAQ

I have a 2001 BMW 325i. I believe that we need to change the wheel bearing (passenger rear). You can check my other questions in case the diagnosis is incorrect...(help??)Does anyone have any diagrams, instructions on how to change them? Is it necessary to have them pressed on/off? (that would determine if I could do this at home or not.Please help, this is my sons car and he is in the military and doesn't have time or cash to spend on it. So mom dad are trying to help them out. Any advice or websites will be appreciated.Thanks, stormphyre

HI Yes a rear bearing is pressed on to the axle.. are you sure its a bearing.. I can't see a 8 year old BMW having that kind of problem. those usually last for years and years.. unless run with out oil.. good luck tim

i just bought vapor XR3 inline hockey skates, and the bearings slow down the wheels more than i would like, so i was wondering which of these is smoother with less friction. keep in mind that the shop that i am going to has all ABEC rated labedas + swiss lite, and only up to ABEC 9 for bevo.

Labeda Bearings

and are fast as hell bearingsgood?

The quality and condition of the surfaces in which the bearings ride is equally as important. This is where you'll find a lot of the cost of expensive hubs and bottom brackets. A good A grade stainless ball is fine used with machined, ground, and polished races and a very minimum of lubricant... just enough to cover the races and bearings. Putting high end bearings into average races will bring you no benefits other than bragging rights.

Ok, i fully understand what they are talking about if they say something like N35degreesE. That all makes sense.But, when they say in my book something like 179degreesT, i have no idea what they are talking about. Can anyone help me?Thankyou all so very muchxo

Three figure bearings are really quite straightforward in that it simply means that all bearings are measured clockwise from North. Examples N 35 ° E = 035 ° SW = 225 °

I took my Expedition to the dealer to check he alignment..... they told me they could not do that because the wheel bearings (all four) needed to be replaced. I took it to two other mechanics.... they said maybe only two needed to be replaced. I didn't ask these other mechanics about the alignment.

If the bearings are bad your vehicle is not alignable due to that fact. The play or looseness in the bearings can be enough to cause the vehicle to not be within the alignment specifications. If there is enough play in the bearings or one is staring to fail to the point of having excess friction that can cause irregular tire wear as well as a steering pull. The bearings once replaced are not a factor for the alignment. You may find that with the bearings replaced that you do not have any pull or tire wear. It is not necessary to align the vehicle after having the bearings replaced but it would not be a bad idea. If you have not had the alignment done recently you should go ahead and have it done too just to eliminate any tire wear or pull issues.

are swingarm bearing and linkage bearings the same or do u have to buy 2 different kits

That would depend on the bike, I know mine are different.

I have seen two different types of spacers and can;t seem to find much on the net about the differences between them. One type just goes in between the two bearings and the other type has a smaller end that goes into each bearing. My question is simply whats the difference between the two and whats better? (Inline skate/hockey/general question)

The difference is the axle diameter that they are for. If you measure the bearing, the opening is 8mm (5/16) Better skates come with 8mm axles and cheaper ones with 6mm axles (1/4) Since 8mm axles fit the inside of the bearings the spacers just take up the space on the axle between them. The spacers for 6mm axles have to have the small ends extending into the bearings to make up for the gap between the axle and the bearing.

I have a pair of 2009 Rollerblade Spark and the bearing spacers are different from the bearing spacers on my 1996 K2 flight 76s and I just bought a Rollerblade Blade Tool and does not work on removing bearings from my 2009 sparks. any advice Fun Skater?

He changes a lot of wheels when he sets up a booth at events and can pull bearings much faster than explaining how. Use a bearing tool or other object that fits inside the bearing. Just put it in as far as the bearing and lean it to a side to put force on the bearing. Make a rolling motion around a circle with your hand and the bearing will walk out of the wheel. A cruder, brute force, method is to take a screwdriver handle from a 1/4 socket set and put it into the bearing hole (it will just fit). Then twist sideways until the bearing pops out. Most better quality skates have gone to the 8mm axles and the rolling motion is a good method to learn.