Filed under: In English | Tags: bearing house, DIY, gear reducer, kerf, salvage, shaft, sprocket, steel-rods, thread, wagon-frame
The ecological band-saw for logs
Comparing the ecological benefits of a self-made band-saw with a circular- or gang-saw.
- The band-saw needs a smaller electrical motor => less energy, even if it is not sawing as fast as the other types of saws.
- The thickness is more accurate for a band-saw, in realistic field conditions => the saw-worker does not need to add extra tolerances on each board.
- The kerf (the gap that the saw ‘eats’ making to saw-dust) is only 2 – 2,5 mm in a band-saw, and the other types of saws has a kerf of 5 – 6 mm. That means “an extra board of each log”.
- To saw big logs for some days, having a pile of big logs on one side of the mill, is not logistically difficult to do. And then having the small logs on the opposite side of the saw-mill, sawing them another day, means that you can easily change and plug a smaller saw-mill motor for those days.
- To obtain, store and change spare-parts is not a problem as long as you have been thinking about, and planned for, different situations from the beginning.
- The maintenance and sharping of band-saw-blades is easy.
What you need:
- Normal hand-tools + welding equipment
- to find the local Junkyard-Johnny
The rails (salvaged) and the foundation for them are very important.
The wagon-frame, (salvaged metal from Junkyard Johnny), has to be stabile. The wheels and ball bearings can be salvaged from any vehicle.
The elevator system has 2 steel-rods with threads, preferably durable against corrosion. [This is the only equipment you need to buy as new.]
Also a suitable chain and sprockets.
One or two used electrical motors 13 – 20 kW + bearing houses. Usually Junkyard-Johnny has a lot of these.
Used tyres + axels
A band-saw blade. (purchased)
If you want your saw-mill to be a deluxe model, you can also build a feed-motor to it. Any motor with a gear reducer of some sort, making the rotation slow, will do: from automated garage doors, old washing machines and similar stuff.
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