Hello all I am looking for 3mm shaft for my cf2822 1200kv brushless motor

That motor is so inexpensive, you could probably buy a new one rather than trying to search for its parts. It is just 600 rupees at vibrant hobbies. Once you've damaged enough of them, try salvaging some parts from them

But I have 6 motors need to change shaft

You've broken shafts on all of them?

Check PM

Why have you posted this here?

My best source of 3mm shafts are the loading tray of a PC or DVD players . I strip these old computers and DVD players down for small screws and also to retrieve the 2x 3mm  slider shafts . Depending on the length of the motor shaft required.....2x 3mm shafts from the players make 4 motor shafts .

Hope this helps .

BS