Bought some smll equipment for the four wheeler I got an ol sears 30in three point disc that we are modifing question I have is will this brake if I hook this straight to the hitch reciever instead of a ball or hitch pin this may get used twice a year. I ask because I know three point disc is made to lift when turning

Had one I used behind a four wheeler many years ago and it worked OK. You can turn corners with it, just not too tight. If you turn too tight you will be putting side pressure on the disc blades and might bend of break one.

Just an FYI - That little disc won't cut in very well unless you weigh it down heavy, or unless you are starting with some pretty soft ground.

Got two plots put in one a well lit loggin road and a bend in a field in a corner the farmer doesn't touch where his equipment cannot turn our little disc worked awesome 100lb of weight worked but in the thicker weeds we stood on if for more weight. Had to spray another area cause weeds were way to thick farmers plow would not even go through it