Originally Posted by
amx1397
if you are disassembling your blower one other way is to go to a bearing place , take your shaft and pulley ask for a bearing with the outside dia. of your bearing and the inside dia will be determined by what size you can turn your shaft too
example lets say your bearing is 2" outside dia and 1" inside dia and you find a like bearing with 2" outside dia. and 15/16 =0.9375 inside dia then you would cut down your shaft down to 0.9377 to give you a 0.2 interference fit. that is if you are disassembling your blower ask your mechanic about this? jim
I am afraid that is not how it works.
There is no need for an interference fit on the inside diameter as it is clamped to the shaft with the washer. Normally the bearing slides onto the shaft if it is put on squarely to a clean shaft. There maybe a very slight interference fit on the outside diameter. The specified bearing comes with specific sizes.. There is not such a large range of bearings that you can pick a bearing with a slight change in one size while maintaining the other sizes. There is a industry wide standardized size for bearings of each bearing type. Other size bearings are specials and expensive.
The OEM bearing is 55mm OD x 32mm ID x 23mm thick. There are specific tolerances for the bearings and specific tolerances for the bore or the shaft which it meant to fit. The actual sizes of the bore and shaft determine the type of fit deemed suitable for the application at hand.