Info On Double Chainsaw Powerhead Setup

sun64

Hi, just wondering if anyone has any advice on double chainsaw powerhead setups. Do they cut quicker than a single powerhead?
How does the starting of them go. I guess you need 2 x people unless you have set up the carbs with an adjusted cable on both to bring both on at the same time.
Also do you adjust both powerheads to rev to the same RPM.
What happens if one is producing more power than the other one. Do you adjust them both till they are the same RPM or will one power up or slow down to he other one.
I am considering this option on milling African Mahogany but not sure on the results and expense of 2 x powerheads compared to 1

Thanks sun64

Rob Chace

Just using to identical powerheads should work fine.

Done it

I've got no idea really, but it looks easy enough.

Chainsaw Motorbike - YouTube

sun64

The only thing that I can think of is if one is tuned better and producing a higher RPM , wether they will equal out or one saw tends to do more work than the other one.
I know this can be a problem when you have 2 outboards and one is not running the same as the one next to it.
Be interesting if anyone has had any issues before with this set up.
Technically you should have twice the power but wether it translates into a faster cutting speed? I guess it also comes down to chain speed as well
Anyone have any answers to this set up
sun64

ntheep

Sun64, I'm also in Darwin and a newbie on this forum. I'm currently trying to get a mill up and running to cut mahogany as well, so maybe we can catch up and yarn? And comparo saws, mills etc, I'll see if i can PM you yet!?
Cheers

Rotax Robert

Just get the rpms close during tuning and they will ballance out. And yes they are faster.

__________________
Earth First, I'll Log The Other Planets Later

sun64

Thanks Rotax Robert, I had figured that. I have brought a tacho from baileys to tune both up . I am still in the process of gathering gear.
What I intend to do is tune both saws while burying the saws in some hard wood.
Hopefully this should get them as close as possible.
I also plan on running 8 tooth sprockets an 2 x stihl 090's.
sun64

Sawchain

here you go, a pair of 090's on a GB 84" mill

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sun64

Nice rig up sawchain, I was looking at the 66 inch GB bar, figured that would be enough for me and is cheaper than the 84 inch.
How well do they go, are their any teathing problems etc that you could pass on.
Are you running 7 tooth sprockets or have modified the wind vane govenor ?
Regards sun64

Sawchain

Hi, they aren't mine, one of the locals owns the setup, my own setup is a pair of 880's on a 66" GB mill
The 090's are running 7T spurs, don't think you will get 8T for 090, as far as I know only 7T spurs are available.


Cheers .... Laurie

sun64

Hi Laurie, Yes you can get 8 tooth rim sprockets. I have 2 x clutch drums for rim sprockets to suit the 090.
I purchased from China these following rim sprockets. They look ok. I have used other before. Will see how long they last but they are not that expensive.
40 x 3/8 7 tooth rim sprockets
40 x 3/8 8 tooth rim sprockets
40 x .404 7 tooth rim sprockets
40 x .404 8 tooth rim sprockets
With an 090 you have the power but not the chain speed.
I am going to port and polish mine and modify the govenor with 8 tooth sprockets
Like I said I am slowly gathering gear and I always have plenty to do at home.
I am going to make a mill similar to a pro cut but with a series of pulleys on the end with a counter weight system to keep me out of the heat, fumes and sawdust flying about.
It would be interesting to see what pricing you get for the 66 to 72 inch double ended bars and 50, 56 and 60 inch standard end long bars.I
I have prices for them and they are not cheap.
Regards sun64

Tony Knight

I to am after a 50".404 for an 880 and am interested in a price if your retailing.

Many Thanks

Tony

Robert Dyer

I had a double milling set up running 2x Makita 9010 on a 56" double ended Cannon bar.

It worked a treat - but I made a mistake running them on a frame and on a hot day overheated one - causing a scored piston.

But you don't have to worry about tuning etc - once they both are working in the wood both are trying to push the chain around.

Willard Holmen

The 2 saws don't even have to be close in rpm etc. I have milled many board feet with a 090AV and a 066 together on a double ended bar Alaskan mill setup. They balance out just fine.
Willard