I get lots of questions about wood processing and the simple truth is there is more than one way to skin this cat depending on:
- What parts you have available
- Your budget
- Your wood inputs
So I put together this chart with the elements of a wood chunker that should help you to start planning your chunker project.
- Power- If you have a tractor I would start there. Next I would consider a dirty old used engine. Something that is cheap and ideal for practicing woodgas will be fine for chunking wood. 4 cylinder is probably ideal, but v-8’s work too.
- Gear reduction- This is just a means of slowing the shaft speed down to something usable like 60-100 rpm at the cut head. Ebay has lots of deals on gear boxes or you can use old wheels of differing sizes pressed together to reduce the speed.
- Energy storage- A smaller motor will be able to do more work with a flywheel because of duty cycle. When you aren’t chunking wood the energy is banked up in the wheels mass, just waiting to be harnessed.
- A cutting head should slice and pinch the wood so it comes apart in neat chunks. The screw head is complicated, so I would go with an old tire rim cut to a steep angle and sharpened.
I hope that helps. Thanks for reading.