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Buying a woodchipper / shredder

 
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Andrea



Joined: 02 May 2005
Posts: 2260
Location: Portugal
PostPosted: Sat Sep 15, 12 3:02 pm    Post subject: Buying a woodchipper / shredder  Reply with quote    

I'm looking to buy a second hand woodchipper / shredder. Has anyone heard of the brand UniTech? Apparently the one I'm looking at has a 9hp Briggs and Stratton Vanguard engine and will chip branches up to 9cm. Is there anything special I should be asking / considering? I can't find a match for the one I'm looking at on the net new.

Hairyloon



Joined: 20 Nov 2008
Posts: 15235
Location: Today I are mostly being in Yorkshire.
PostPosted: Sat Sep 15, 12 4:52 pm    Post subject: Reply with quote    

The name rings a bell, but I can't think where from.
9hp sounds sounds a sensible size for heavy domestic use.

Tavascarow



Joined: 06 Aug 2006
Posts: 8407
Location: South Cornwall
PostPosted: Sat Sep 15, 12 8:45 pm    Post subject: Reply with quote    

If you can, ask for a demonstration.

Ty Gwyn



Joined: 22 Sep 2010
Posts: 4236
Location: Lampeter
PostPosted: Sat Sep 15, 12 8:48 pm    Post subject: Reply with quote    

9cm thick branches ,seems a waste of good logs to chip.

Hairyloon



Joined: 20 Nov 2008
Posts: 15235
Location: Today I are mostly being in Yorkshire.
PostPosted: Sat Sep 15, 12 9:08 pm    Post subject: Reply with quote    

Ty Gwyn wrote:
9cm thick branches ,seems a waste of good logs to chip.

Yes. But it means it will chip big twigs at a sensible rate.
Anything smaller wouldn't.

Andrea



Joined: 02 May 2005
Posts: 2260
Location: Portugal
PostPosted: Sat Sep 15, 12 9:23 pm    Post subject: Reply with quote    

Hairyloon wrote:
Ty Gwyn wrote:
9cm thick branches ,seems a waste of good logs to chip.

Yes. But it means it will chip big twigs at a sensible rate.
Anything smaller wouldn't.


That's what I'm figuring. I'd imagine anything of 9cm would go on the firewood pile, but it means it wouldn't be working flat out to chip something smaller.

Hairyloon



Joined: 20 Nov 2008
Posts: 15235
Location: Today I are mostly being in Yorkshire.
PostPosted: Sat Sep 15, 12 10:04 pm    Post subject: Reply with quote    

Andrea wrote:
That's what I'm figuring. I'd imagine anything of 9cm would go on the firewood pile, but it means it wouldn't be working flat out to chip something smaller.

Consider the fractal nature of wood. When it splits, the smaller branches tend to have a similar total cross section, so if you cut the twiggy bit off the end of a 9cm stick and feed it to the chipper, then it is chipping something equivalent to a 9cm stick.

But the line at the bottom is rate of work. A 9cm chipper chips a 3cm stick a lot quicker than a 5cm chipper.

Bodger



Joined: 23 May 2006
Posts: 13510

PostPosted: Wed Sep 19, 12 9:13 am    Post subject: Reply with quote    

We checked the 'Which' website and settled for one that they recommended. A couple of weeks ago, we bought a Bosch AXT 25 D. It performed admirably over the the weekend.

Andrea



Joined: 02 May 2005
Posts: 2260
Location: Portugal
PostPosted: Wed Sep 19, 12 11:48 am    Post subject: Reply with quote    

We're probably having to pay about 5 times that, second hand, for the machine we're looking at. Still pondering.

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