4" is small, as mentioned above, due to the trouble with wood that isn't straight. There is a company in Canada, that makes nice chippers, and depending on the size, not much more than the one you listed. Woodland Mills? I forget.. I ended up buying a well-used Bush Hog
chipper/shredder with 5 inch or so capacity, and it works fine, but is put together with like 20 small nuts and bolts so sharpening is a challenge. Still, the price was right and it works. I believe the Bush Hog was rebranded from another brand, and the same
chipper/shredder with some modest changes is still available today, but it's very expensive. I forget what brand it goes under now, but Echo was selling it for a few years not too long ago.
Even if you never chip anything more than 3 inches, you'll want a bigger
chipper, on that I'll bet.
I have an old Troy Bilt super Tomahawk 8 hp, 3" machine I bought new about 35 years ago, and even though I burn firewood to heat the house, it was small for what I needed, and I sure wish I had an 8" machine even though I would never chip anything close to that, unless completely rotten. 5" is better than 3", by a LOT, and you'd find 6" far better than 4..
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