Slip Clutch on Tillers to Protect PTO?

Is a slip clutch necessary when using the tiller on my “30”. May 14, 2016.

I am not sure the slip clutch is a must have but I think it is a good idea. As far as PTO shafts breaking, when the tiller blades hit an obstruction it’s the shock of the stop that usually does in PTO shafts. Keep in mind the TO-30 PTO shaft is only approximately 1 1/8″ in diameter throughout its length. Even if you have a conversion shaft with a 1 3/8″ splined end, the rest of the shaft is still 1 1/8″. Later tractors, like the TO-35, with 1 3/8″ PTO shafts are usually 1 3/8″ diameter throughout their length and therefore more durable. 1 1/8″ PTO shafts on tractors like the TO-30 can break or twist inside the tractor as well as at the end that protrudes from the rear of the tractor.

As I recall the Belle City corn picker had slip clutches and other devices to protect the picker as well as the tractor.

The Howard Rotovators I am familiar with had extremely heavy PTO universal joints and yet failed at the ears on more than one occasion. The ears are obviously the weakest points on the shaft assembly.