Exatem
Guest
quoting all that was said by marcof, linch, stefanobruno, er president, and etc. etc.
I would add that starting from something extremely complex like a turbo fan or a turbo jet that is, it is a real suicide.
especially if you do not even know how the choice of bearings takes place.
bearings, as someone said, do not dimensional, but they choose. Company catalogs offer complete information about all relevant data.
you have to evaluate the application and choose the type of bearing, the degree of precision, lubrication, the possible type of seal and the load coefficient. if the bearing has to bear a high load from the stand, it is necessary to evaluate its static load capacity that is given by the catalogs of the producing houses (this value should not be exceeded to prevent the balls, or the rollers, leave their footprint on the slopes because a track marked by these footprints, will become noisy during rotation).
a particular attention must be paid to the value of the maximum speed, or better, of the peripheral speed. small diameter bearings, can generally rotate to a greater number of turns than large diameter bearings. in the case of high speeds the best type of lubrication is that oil mist or spray.
not to mention the alignment of the axis for mounting with multiple bearings, the temperatures in play, the requirements of durability, reliability, impacts, axial loads....
In short, they are small masterpieces of mechanics.
every problem of design, has not only one solution, but will have several, none of which is incorrect, but where one will be better because in it imagination, ingenuity, will be supported by understanding and application of scientific principles.
so listen to those who told you to start from the simple and at least, to study a minimum of construction of machines.
You will avoid ironic jokes and free figurines.
I would add that starting from something extremely complex like a turbo fan or a turbo jet that is, it is a real suicide.
especially if you do not even know how the choice of bearings takes place.
bearings, as someone said, do not dimensional, but they choose. Company catalogs offer complete information about all relevant data.
you have to evaluate the application and choose the type of bearing, the degree of precision, lubrication, the possible type of seal and the load coefficient. if the bearing has to bear a high load from the stand, it is necessary to evaluate its static load capacity that is given by the catalogs of the producing houses (this value should not be exceeded to prevent the balls, or the rollers, leave their footprint on the slopes because a track marked by these footprints, will become noisy during rotation).
a particular attention must be paid to the value of the maximum speed, or better, of the peripheral speed. small diameter bearings, can generally rotate to a greater number of turns than large diameter bearings. in the case of high speeds the best type of lubrication is that oil mist or spray.
not to mention the alignment of the axis for mounting with multiple bearings, the temperatures in play, the requirements of durability, reliability, impacts, axial loads....
In short, they are small masterpieces of mechanics.
every problem of design, has not only one solution, but will have several, none of which is incorrect, but where one will be better because in it imagination, ingenuity, will be supported by understanding and application of scientific principles.
so listen to those who told you to start from the simple and at least, to study a minimum of construction of machines.
You will avoid ironic jokes and free figurines.