Can I ask if the blade spins vertically or horizontally. On the current Bosch it's vertical and if you get a couple of woody stems together these seem to catch between the blade and the guard very easily and jam the machine.
Our old machine was of the crushing type but worked pretty well on prunings, having a screw input that drew the stems in. The only things it didn't like were soft climbing stems such as ivy which wrapped around the screw
Or perhaps it's just me trying to shred too much material
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