How do i get the sprocket off i had a half inch breaker bar on the nut and i cant get it loose any thoughts

 

only way I've been able to do it is with a air impact.

 

That was the only way I could get it as well.

 

Yeah i had a small impact ''kinda cheap'' and that wouldnt do it so i tried the thingy you pound onto it with a hammer and it ussualy breaks them loose that didnt to it either so i went down to the local coop and had him give it a try i comes out with this huge impact and cant get it
it turns out there is a little play in the chain so i tightened it up and then it still took like a minute of the impact wrench to get it that thing was f***** on there