[Stoves] Chaff cutters and wood choppers

[energiesnaturals]

The Jensen Buschhacker is a kind of disc chopper wth only 1 blade sopported in front of the actual disc and thus free to let up to 12 cm enter the space between fixed counter knife and the rotating blade. The wood enters horizontally, but at that 30 or so angle to the disc's plane. The cutting length is given by the speed of the advance rollers/cylinders vs. the rotational speed of the disc as usual.
These devices are no toys, the biggest of them cut nearly 20 cm of oak branches!
My 60 y.o.Buschhacker munches through 15 cm of softwood and 12 cm of extremely hard dry GREENOAK (quercus ilex) and wild olive. And this is the middle model of 3.
Of course you wouldnn't want to lift these branches high up to insert them into a garden chipper type, thus the horizontal cutting angle.There must be a series of photos on the bioenergy list somewhere, but i cannot find it from where i am right now.
Rolf




Enviado desde Samsung tabletCPP GMail <crispinpigott at gmail.com> escribió:When the blade impacts the wood/branches are they pointed downwards? That would tend to pull the feedstock in as well as provide the bevel cutting effect. 

Thanks 
Crispin 
From: "energiesnaturals" <energiesnaturals at gmx.de>
To: "stoves at lists.bioenergylists.org" <stoves at lists.bioenergylists.org>
Sent: 3 January, 2014 12:54 AM
Subject: Re: [Stoves] Chaff cutters and wood choppers

Nail trimmers indeed, but only if you intend it.I have worked with them time ago and as long as you put the alfalfa/hay/straw right on the conveyor chain and let the advance cylinder in front of the cutting wheel do it's job, there is not much danger to get caught...
Btw, they still build them in Spain as i inquired for Christa some month ago.

The same principle applies to the Jensen Buschhacker i described earlier.
Not only has it 35deg angle between advance rollers and disc plane, but the blade position in the disc cuts much like you would cut through aloaf of bread with a knife.
This enables the Jensen to perform very well with only 12-15 hp tractors on the pto.
My Laimet Hp 21 also saves energy cutting, but we strongly miss the advance rollers.
 We are actually busy implementing them together with a pickup system for prunings and forest slash for the Laimet and two modern Jensens.
Guess for what!
Rolf 



Enviado desde Samsung tablet

mtrevor at ntamar.net escribió:
The one at the link above is really advanced
when it comes to safety which is good
because this sort of machine was responsible for more lost fingers
than any other piece of farm equipment.

Impressive piece of machinery and EXACTLY my immediate reaction--- Nail 
trimmer extreme!!!

M Trevor 


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