At Agri Supply ®, we offer a variety of disc blades to fit your tillage needs. Also known as disc harrow blades, we offer notched and plain blades.
Ford 7710, Ford 550, Ford 1910, Ford 4430, KD Forklift, Ford LGT17H, New Holland L255 Skidsteer
Well, it has white iron bearings and could be a few brands.
Take the nut off and see the shape and size of the hole. Looks to be be 1" square which a lot of those are.
Measure from the center ti the closest frame member to get a radius. Double that to get the diameter and subtract at least an inch to get the disc size. If you come up with an odd number, subtract another inch to get the diameter.
You can put on all smooth, all notched or notched front and smooth rear