The Hammer A3 41 jointer planer is the largest machine from the Hammer A3 series. It is the larger version of the Hammer A3 31. It is about 40-45% more expensive than the A3 31, making it only worthwhile to upgrade if you really need the extra capacity.
There are also two machines which separate the jointer and planer functions: The Hammer A3 41A, which is purely a jointer, and the Hammer A3 41D, which is the same machine, but only a planer. These machine are great for people who prefer separate machines, but together they are about 40-50% more expensive than the A3 41 alone.
In its base form it comes with a 3-knife, quick-change, self-adjusting cutter block. This can be upgrade to a so-called ‘Silent-Power’ cutter block, which has spiral cutters and is — as the name suggests — much quieter. In this video you can see the difference in sound it makes.
The Silent-Power block has spiral cutters, which is actually 62 small blades lined up in a spiral form. These blades have four sharp sides, meaning you can simply unscrew them, turn them around 90 degrees and use the next sharp edge. Another benefit of this is that when you nick the blade, you don’t have to resharpen the entire blade, just turn around one small one.