where to go from?

[maxstralis]

hello to all I would like to understand how to calculate a calettatore and then take it from catalog.

I press that it's the first topic I put and that I've already done the function search without any result thanks to all:smile:

 

[Focus]

The calettators are "chosen", they are not calculated. :smile:

Hi.

 

[maxstralis]

if I have to connect a toothed wheel to a tree do I to the eye???????????????????????????????????????????????? ? :confused

 

[paulpaul]

you choose based on the max torque to be transmitted multiplied by a certain safety coefficient or service factor that depends on the application (number of starters/hour, characteristics of the connected machines, not constant pairs, etc.).
the hub must have adequate thickness not to cause dangerous tensions (the same type of stress of thick pipes subject to internal pressure): the catalogs give the maximum pressure on the outer ring (and also on the inner one).
the shaft and the hub must have the finishing and tolerances recommended by the catalog of the manufacturer.
It is also always preferable, in my opinion, to have an axial response of the organ that you have to juggle, so avoid freely tapping the pulley or the wheel on a tree without bars. it would be preferable to have a match also inside the hub, in order to send it to joke, with the due precautions for a future disassembly: depends of course also on the application.
Example 1
example 2Usually it is known the diameter of the shaft from other considerations and therefore it must determine the diameter and length of the hub.

 

[MassiVonWeizen]

the clarification of focus has already given you a clue.
the calettator is chosen according to the forces in play and the need for operation.
leaving for the moment the forces, on which I am not experienced, the calettatore can be self-centered or not, minimal swallows if the construction space is limited, mounts and/or rapid sontages if there are frequent interventions on it for small diameters (under 10mm) or large (over 500).
In short, you have to start from the transmission and then based on the model oriented function.


♪ qui

 

[davide75]

I add that usually at the bottom of the catalogs like that of the tollok give a formula to calculate the minimum thickness that must have the piece according to the pressure that exercises the calettatore. Usually there are also charted specific pressure values for each calettator depending on the type of calettatore itself. These values are to be inserited in the formula present in each catalog you need to calculate the minimum thickness.

 

[Focus]

if I have to connect a toothed wheel to a tree do I to the eye???????????????????????????????????????????????? ? :confused

Since you're a student, I wanted to give you a clue to make you think about it, but later answers clearly explain the concept. :finger:

Hi.

 

[maxstralis]

thanks to all of you for the explanations:finger::finger::finger:........... .