Help Designing a Brake Please

[zolipend]

Hai, I'm new here, I hope find you guys well, Sorry, I'd like to ask about designing brake, currently my objectives for designing is Disc drive, I'm very confused, how to calculate, the parameter is the brake need to stop shaft in 775 ppm, in 0,5s for time, what I confused right now, what parameter factor to be consider in designing the brake.

 

[Lnewqban]

Welcome!
Could you clarify the meaning of "to stop shaft in 775 ppm"?

 

[Baluncore]

Some context would be good.
Is it for data storage, or part of a grass mower ?
How big is the disc ?
What does it weigh ?
Is it direct drive ?

 

[256bits]

Welcome!
Could you clarify the meaning of "to stop shaft in 775 ppm"?

Certainly a head scratcher.
But then it came to me.
A typo ppm = rpm

 

[jack action]

Brake Design and Safety by Rudolf Limpert might be of interest to you.

 

[jrmichler]

what parameter factor to be consider in designing the brake.

Brake Design and Safety by Rudolf Limpert might be of interest to you.

Please understand that your question is so general that a book, such as the book linked by @jack action, is the simplest answer that we can give to your question. There are also other books on the subject of brakes. You provided so little information that any attempt to answer your question would require writing a similar book.

A good place to start is with search term design of brakes. Careful reading of the first few dozen hits will give you enough general background that you should be able to ask questions that we can answer.