From an earlier thread answered by Cooter. You can search for it and there are some even older threads, too, that will point you in the right direction. Also, if you check out lawn site dot com under heavy machinery and paving, there are a few threads..
What are the specs on your machine?
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Re: Mulcher vs flail mower vs rotary mower for compact excavator?
I will give my opinion of the 3 and the differences.
Rotary cutter is very fast but will not leave a a well processed finished product.
Flail mowere are great for grass vines and small trees( thing 1 to 2 inch), slower than rotary but leave a beeter finished product, will not be effective mulching trees.
Mulcher. Will leave the best finished product, marginal on grass, good on underbrush, the best choice for trees.
Limited to 20 gpm it will never be a barn burning in the mulching department. 2 too 4 inch stuff will be fast. 5 too 6 inch stuff will be slower but doable.
I have a couple 100 hours on my Torrent with a Kx161 and I chose it over the other 2 choices and have never looked back.