longest bar and type of chain for Husqui 550 XP

[Mick Dempsey]

1 hour ago, Gabriel82 said:

60-70cc seems to be the right spot for a chainsaw for the normal/"average" guy, not professional.

 

BUT: I did got the chance to hold and use/cut into a hardwood log with a Husqvarna 390,old but in good shape. 

 

I was impressed ,quite a difference from Makita EA6100P. 

 

And same dude ,that is almost always either in forest chopping trees or in 6x4 truck transporting logs , confessed he's thinking about a new Husqvarna 395xp . 

 

Because more power= better chainsaw.

 

Who's complaining about weight get back to gim and pushups 😁

 

I haven't used+carried that 390xp all day or at least 3-4 hours but it didn't felt that much heavier than a Makita EA6100.

Chain .325 but it has limits...

 

As for blade length... 

As long as you need it to be .

 

Women want it longer and bigger. 🙄

 

They must know something 

As pure a pile of rubbish as has been posted on here for a while.

[Stubby]

1 hour ago, Gabriel82 said:

 

 

I haven't used+carried that 390xp all day or at least 3-4 hours but it didn't felt that much heavier than a Makita EA6100.

Chain .325 but it has limits...

 

390 should be on .375 ( 3/8ths ) not .325 . Bar length 20,24,28 seems good . I have a Spud ported one . 

[markieg31]

I used to be dead against it, 15 max on a 550. Then I got older, tried me mates one, yes this is the life, longer bar you don't have to bend down so far! You can get through bigger diameter logs when chugging down or felling, What's not to like, of course the chain isn't running up as fast as it would on a 15 but hey I don't care anymore, and i don't really notice it. 

One thing I never understood was putting a 3/8 chain on a smaller saw, had many a disagreement with regards to the merits of this set up, call me a bigger but my mind will not be changed on that! But you can try as I am a reasonable person.

[ABtrees]

Ok, you guys will need to cut me some slack here but ............

With my ignorance and simpleton's view (of life) can someone explain to me why a longer bar/chain reduces chain/ cutting speed so much ?

You have the same teeth spacing (?) and therefore the same number of teeth (cutting) in a given diameter of log/tree at any stage of the cut.  You therefore have the same load on the engine and (presumably) therefore a similar engine rpm which on any given sprocket is driving the chain at the same speed ????

So am i right in thinking the 'killer' is just the additional friction of an extra 2 inches ?!!!!

[Muddy42]

13 minutes ago, ABtrees said:

Ok, you guys will need to cut me some slack here but ............

With my ignorance and simpleton's view (of life) can someone explain to me why a longer bar/chain reduces chain/ cutting speed so much ?

You have the same teeth spacing (?) and therefore the same number of teeth (cutting) in a given diameter of log/tree at any stage of the cut.  You therefore have the same load on the engine and (presumably) therefore a similar engine rpm which on any given sprocket is driving the chain at the same speed ????

So am i right in thinking the 'killer' is just the additional friction of an extra 2 inches ?!!!!

 

Thats what I think yes - speed and torque.  The extra friction caused by pulling the chain round the extra 2 inches out and 2 inches on the return.  Plus Im sure there are other factors.  Heavier chain.  Chain tension generally increases with longer bars to keep the chain tight, so more friction on the tip.

 

[Stubby]

3 hours ago, ABtrees said:

Ok, you guys will need to cut me some slack here but ............

With my ignorance and simpleton's view (of life) can someone explain to me why a longer bar/chain reduces chain/ cutting speed so much ?

You have the same teeth spacing (?) and therefore the same number of teeth (cutting) in a given diameter of log/tree at any stage of the cut.  You therefore have the same load on the engine and (presumably) therefore a similar engine rpm which on any given sprocket is driving the chain at the same speed ????

So am i right in thinking the 'killer' is just the additional friction of an extra 2 inches ?!!!!

Its when you put a longer bar into a bigger log for a given size power head . Put a 20" bar on a 50cc and use 18" of it as opposed to a 15" bar in a smaller log and only using 12" of it . On the 20" you are asking it to drag more cutters through the wood than you are on the 15" . 

[pleasant]

Rules of thumb......ideal maximum bar length is approx a third of the engines cc's .

 

 

[parkertrees]

25 minutes ago, pleasant said:

Rules of thumb......ideal maximum bar length is approx a third of the engines cc's .

 

 

Never thought of it like that before but yes... going through all my saws in my head thats pretty bang on!