We have been dealing in chippers for many years. We stopped supplying copy blades about 7 years ago. Feed back from customers told us they wern't as good. We found that original blades rarely crack under normal use, only when hitting large pieces of steel wrongly fed into the machine, copy parts will sometimes crack under normal use, they also loose there edge alot quicker. my opinion is that wood chippers are designed around the chipping system, the blades and anvils, blade size, shape, grade of steel and hardening process are a large part of the machine development, why change this ? The only advantage to copy blades is a small saving on purchase price. i think an important factor is blade life, sharpening intervals.
