mo1
Platinum Member
I remember some brand that used a tire attached to the PTO shaft that spun the blades. I suppose that was to eliminate the need for a gear box? Probably no need for a shear pin either.
That was the FMC Sidewinder. I still see some for sale occasionally around here. The blade spindle essentially had a second blade pan above the blades, and the tire spun the "upper" blade pan. The tire thus took the place of the gear box and the shear pin/slip clutch.