A tilling implement for use with a farm vehicle includes a frame, a tilling element attached to the frame, a bearing assembly configured to allow the tilling element to rotate relative to the frame. The bearing assembly can include a first race, a second race spaced apart from the first race to define a gap therebetween, a bearing rotatably disposed within the gap to allow relative movement between the first race and the second race, a seal including a flexible protrusion having a distal end that presses against the first race to seal off the gap, and a stop positioned adjacent to the flexible protrusion configured to prevent the distal end of the protrusion from bending towards the bearing.
