Looking to convert my large trailer into a mobile pallet recycling
(into fuel) operation for next autumn (GB). Want the saw to run off car
battery so any ideas/experience for
1) converting battery saw e.g. deWalt
2) putting a 12 volt motor onto bandsaw
3) something i have not thought about
Chainsaw is not an option
> Looking to convert my large trailer into a mobile pallet recycling
> (into fuel) operation for next autumn (GB). Want the saw to run off car
> battery so any ideas/experience for
> 1) converting battery saw e.g. deWalt
> 2) putting a 12 volt motor onto bandsaw
> 3) something i have not thought about
> Chainsaw is not an option
I like option 2.
Looking to convert my large trailer into a mobile pallet recycling (into
fuel) operation for next autumn (GB). Want the saw to run off car battery
so any ideas/experience for
Please, do yourself a favor, use a deep cycle battery to operate your saw,
NOT your car battery! You will kill your car battery in no time by
discharging it often by more than 20%. A car battery is designed for a
very large current supply for the short duration of an engine start, which
actually uses only 5% of the battery energy capacity in regular conditions.
The battery gets recharged back immediately when the engin is running. It
is not designed to be discharged!
A deep cycle battery has a different plate construction and is meant to
supply a smaller current and be discharged by 80% for 200 to 300 cycles.
By using a battery isolator, you could rechage (partly, maybe) the battery
while driving back home.
Car starting batteries have the bad habit of dying suddenly and leaving
you stranded in the wrong place. Please do some research on deep cycle
batteries and the best ways to prolong their life.
First you would have to compare apples to apples. Most any automobile
engine runs more efficiently than your typical portable dedicated generator
engine. Any you could probably run 15 alternators on an automobile engine
if that was all that was expected out of the engine.
However if you are going to make an assertion that on the face of it seems
unlikely (a 200 horsepower engine running at near idle to provide the
couple of horsepower necessary to run a bandsaw is _not_ going to be more
efficient than 2 horsepower engine running full throttle unless that 2
horse has something badly wrong with it) and then not support it then the
rest of us will decide that you are a loon.
I would not recommend trying to run a decent size saw or bandsaw on 12V.
Think of the large cables you will need. Consider a 1 HP motor. Small for
a table saw, not considered small for a bandsaw.
1 HP = 745 Watts (Volts x Amps). Accounting for motor efficiency, you could
be looking at needing to run cables which can take 70 Amps. If you
undersize the cables, you starve the motor and will cause something to fail
I recommend you buy a small portable generator. I do not know about the UK,
but in the US there are many sizes and brands available. The less expensive
will not last as long and have more noise.
At least this way you can use whatever motor is on the saw/bandsaw and may
also use the generator for lighting.
If all you are doing is cutting up pallets, I would go for a bandsaw as
requiring less power for a given cut thickness, due to far fewer teeth
cutting compared to table saw.
I have a 1 1/2 HP table saw and it really slows down when cutting 8/4 maple.
I used to have a 3/4 HP bandsaw which was able to cut the maple without a
problem (assuming the blade was not dull). I now have a 2 HP bandsaw and as
expected it can cut 8/4 maple even better than the smaller unit.
Another consideration is the cost of blades. If you are cutting pallets,
you may miss a nail or staple. If a blade was to be ruined by accidentally
cutting metal, I think a bandsaw blade will be a cheaper replacement than a
decent table saw blade - at least it is for me.
My table saw blade cost me $90. My bandsaw blades cost me around $20.
Metal saws turn slower and use finer tooth blades. You can cut (slowly)
wood on a metal saw easier than cutting metal on a wood saw. There are a
couple of dual speeds but I don't know if they are acceptable for both.
Handsaw, crowbar and small sledge hammer? Or buy an 18v cordless
sawzall and a mess of batteries that you can recycle in the evenings.
I know that not an innovative solution, but the hand tools are not much
slower for demolition/recycling tasks. Good exercise too, and they fit
the whole "recycling" ethic well too boot.
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