Hydraulic Chain Saw

[Todd S]

Good Day All. As you can see I am new and hope I am not posting on the wrong site. I am starting to build a wood processor and wanted to know if anyone has good info on a motor size for a chainsaw or if you have a certain calculation to do to get the correct speed and volume of motor? I am also looking for an old bar to purchase if you know anyone of you old loggers. God Bless

[mad murdock]

Welcome Todd S.  I think first off you need to know the volume capacity of your hydraulic pump, that will be turning the motor, then you can figure out the RPM of any motor based on the cu/in per RPM of the motor.  I think it would depend on the size bar, and chain you plan on running.  I don't know how fast (chain speed wise) harvester bars run, but most chainsaws are between 6,000-9,000 RPM in the cut under load.

[1270d]

my harvester runs a parker 19cc saw motor with a 12 tooth .404 sprocket.  its a 93 driver chain.  you might be able to search for more info on the oil supply requirements, or I could possibly get the actual part number of the motor.  cant remember if it has a tag on it anymore.  I think the chain speed is 40mps   

here is a link  that shows flow/pressure requirements for this motor
http://www.hultdins.com/pdf/SC100.pdf

[bandmiller2]

Todd, I'am not much help but with hydraulics you will rely on torque more than chain speed. If you could find a firewood processor in your area you could get a good idea. The old time gear reduction chainsaws would cut with a slow chain and stay sharp longer. Probibly harvestor bars and chain will hold up best. Frank C.

[shinnlinger]

http://www.stanleyhydraulic.com/Products/ChainSaws/tabid/139/Default.aspx 
A big circle blade on a hydraulic motor could do some damage too I suppose.

[CRThomas]

Good Day All. As you can see I am new and hope I am not posting on the wrong site. I am starting to build a wood processor and wanted to know if anyone has good info on a motor size for a chainsaw or if you have a certain calculation to do to get the correct speed and volume of motor? I am also looking for an old bar to purchase if you know anyone of you old loggers. God Bless

You might want to look into a electric saw if you are located close to electric I have a cheap Sears craftsman 4 hp and it will work with my MS180 they make bigger electric saws than mine they are called stationary saw very heavey I bring my logs home then I use my electric saw to chunk with it has a 18 inch bar they are a whole lot cheaper than going with hydrolics just word for thought

[shige]

Hello all from Japan.
I just join this forum and quite a newbie here.
It's been nice joining this topic.

I'm also planning to build my firewood processor, and looking for hydraulic motor for driving chainsaw sprocket.

Parker's MGG hydraulic motor is cheap (around $200), high-speed (5000rpm), so I'm going to use that motor.
With 14 teeth sprocket, chain speed will be 26.8mph.
14teeh * 5000rpm * .404inch * 60 secs / 63360 (1mile in inch) = 26.8
Is this speed is enough for cutting woods?
I will use 24" bar.

My hydraulic power source is Bobcat s130, 17gpm at 2700psi.
Or Yanmer Vio excavator 12gpm at 3000psi.

Parker's MGG200 runs with 2000 (or 1500) psi, so I guess that I have to decrease pressure with relief value, though, I feel it's waste of energy.

Does anybody know more high-speeded motor, suit with 3000psi?

And I have a question about oiler.
Many harvester uses hydraulic oil for cooling.
How can I lubricate hydraulic oil to chainsaw bar when running hydraulic motor?

I'm also interested in auto tensioning mechanism.

I have never seen the harvester/processor...

my harvester runs a parker 19cc saw motor with a 12 tooth .404 sprocket.  its a 93 driver chain.  you might be able to search for more info on the oil supply requirements, or I could possibly get the actual part number of the motor.  cant remember if it has a tag on it anymore.  I think the chain speed is 40mps   

here is a link  that shows flow/pressure requirements for this motor
http://www.hultdins.com/pdf/SC100.pdf

[1270d]

The saw unit I was referring to requires 2300 psi @ 35 GPM I think.  The info is in the link in my previous post.  The super cut saw has integrated chain oiling as well.

Here it is in action.   https://www.youtube.com/watch?v=itth4N0Khac&feature=youtube_gdata_player

[shige]

Hello 1270d, thank you for the link to youtube video.
The saw in a video cuts very fast.

My bobcat does not have enough output flow for that saw unit, so I have contacted the Parker's customer support to query the best motor for my environment.
They said, MGG motor is not manufactured now.

By the way, the saw unit in the video may be used with around 12ton - 20ton middle size of the excavator, right?

The processor I want to build is for firewood production.
It has a horizontal table with feeding system, cuts logs with chainsaw (or huge circular saw), then splits.
I just bought a plan sold at http://millerswoodcutting.com and trying to build same one.

The feeding system in the video may not work well with broadleaf trees.
Japanese people prefer broadleaf trees for firewood.

[1270d]

You are correct, this should work with a smaller excavator.   The video was only to show the saw working, not the whole processor head.   
Research  "hultdins supercut 100". It is a self contained hydraulic saw with integrated chain oiling and saw bar pressure.   This is the unit I have.     

We use processor heads somewhat larger than the one in the video for broadleaf timber.