Which chuck to fit 6" rotary table??

[wiatroda]

The fact is my rotary table have 4 t-slots so it looks like 4 jaw chuck with 4 front mounting holes as well will be perfect couple

[Jonathan]

Yes it does all depend on what you want to do with it.

The fact is my rotary table have 4 t-slots so it looks like 4 jaw chuck with 4 front mounting holes as well will be perfect couple

True, but it's not really hard to make a backplate is it...

I have a 200mm 4-jaw self centring chuck on my lathe, TOS brand. It's very accurate, but that's probably not an issue on a rotary table.

[wiatroda]

True, but it's not really hard to make a backplate is it...

I have a bit of 6mm steel plate in stock. Do you think is it thick enough ??

[Jonathan]

I have a bit of 6mm steel plate in stock. Do you think is it thick enough ??

As long as you don't need to tap it more than M8 I should think so. If there's a fair few bolts then it can't bend much. If it was on a lathe you would want more.