Grinder for BFR or wood chips

[chatelot16]

I did not count the mm correctly ... you're right, it's trimma

it was sold at around 100 euro at Leclerc, but we see more often the disk model 3000t / mn that the slow geared model of which I speak

we also see the same kind at lidl or aldi, about once a year at about 100 euro too

[chatelot16]

OKAY! A toothed wheel to cut and a wheel that regulates the progress ...
I can not see the interaction of the two ... Is the regulating wheel synchronized with the other?

Which motor powers and which diameters of branches do you envisage?

if the holding wheel turns 2 times more slowly, it will have 2 times more tooth, so that the tooth meets well: well synchronized

if the slow wheel turns 3times more slowly, it will have 3 times more tooth

for the cylinder machine there was no precise report because it is very small tooth in relation to the diameter of the cylinder, so synchronizes or not does not matter

what diameter do I want to spend? all that is too small to make salable firewood: therefore bigger than small garden shredder, but without trying to make wafer with big wood: 5cm would be enough

[Ahmed]

For information, the brf was limited to 7 cm because it corresponds to the traditional minimal delineation of firewood ...
It does not seem to me a bad base, especially since branching is, by definition, quite irregular, it is better to take a small margin to absorb these peculiarities.

[Did67]

Limiting the diameter of branches to make BRF also has an "agronomic" reason: we limit ourselves to use sapwood, part living wood.

The dead wood, which then forms on the thicker trunks, and which constitutes the framework, the "Eiffel Tower" of the tree, is less rich, decomposes less easily ...

Hence the term "raméal" that the Canadians put in BRF.

[Another thing, on the contrary, is the florestière plate for boilers: if "technically", the shredding uses the same technology, if the product, visibly, is similar, this difference must not be lost sight of. , linked to the desired purpose].


Sapwood, or aubour, is the part of the tree just under the bark, usually soft and whitish. This is the part corresponding to the most recently formed growth zones containing living cells. It is generally more susceptible to xylophagous insects because it is richer in protein.

The sapwood is easily cracked and can not be used for elements of a supporting structure.

The sap is transported in the sapwood by active vessels.

[Ahmed]

Absolutely! The lignin of adult wood is much more highly polymerized than that of the twigs and the fungi are struggling to "unravel" it!
If I mentioned this limit, it is of course that there is always a little arbitrariness in the definition of "branches" ...

By lowering this figure, the wealth of the brf increases, to the detriment of the volume: question of just compromise.

With large woods (and therefore a big crusher!), It is better to start with an aerobic composting that neutralizes polyphenols and tannins (see method Jean Pain).

[chatelot16]

call a moderator to correct this BFR in the title of the message!


of course with big wood it does not make the BRF but platelets ... which at home is mainly the goal ... I even tend to fuel also what could make the BRF

trimma mill or lidl as it is is perfect for making the BRF

it swallows the branches up to 3cm without problem

it consumes 700W at full load and 2500W at full load

it is already there that there is a progress to be made

empty the gear rotates without any need of power: if the engine was better 20w should be enough ... and fully loaded 1500w

but I do not know parano of the yield: for the BRF if the amount to do is low the grinders as they are are good

it is for my main use of energy wood that hunting is more important ... and it is also to turn a lot of time: a better engine will also be useful for the lifetime