...its a large chainsaw. you run it with the "fc51" type of valve we have been talking about, which is incorporated into the handle of the saw. these valves are made nearly identically by a number of manufacturers, who all describe it differently, some incorrectly, hence my confusion about...
i think it is a lie that the excess port on the valve is "pressure compensated" and i think that since only one port can possibly be compensated in this type of three way, single spool valve, it is therefore a priority valve.
im a beginner at this though so idk
because i got a high performance motor for very cheap and it happens to be reversible. it's a small, 8000 rpm rexroth axial piston fixed disp... if you're bored here's the lit: https://dc-us.resource.bosch.com/media/us/products_13/product_groups_1/industrial_hydraulics_5/pdfs_4/ra-a91001.pdf...
I was hoping so! Then I got worried that the slight backpressure of the 25'+ return line to tank (properly sized) would start some sort of fluttering or pressure build...
do these pieces of information change anything?:
*the motor is reversible
*both the work port and the excess port on the...
Hello
I was going to control a saw using a pressure compensated adjustable flow control valve, however it will require 3/4" or 1" return hoses for my desired flow.
I believe the "excess flow" port on the valve (which is also pressure compensated) needs its own return line directly to the tank...
the motors im looking at for the auger should make at least (continuous) 400 - 450 ft-lbs, e.g. a 25 lbs parker motor with high shaft loading tolerances... so yes, even with a 3' handle it could get very violent. this is why a trigger that returns to zero if released is important...
you're saying that is the type of valve that these saws use?
I am looking at using one of these Link mounted as part of the handle of the tool. lengthening the lever on the valve and giving it a spring return to zero, if i'm lucky it might work well, right? if i only need to use 0 - 8 gpm...
see now im lost. i have little to no idea what this entails. i have very little fabrication capabilities to be honest, i can bolt things together and get some welding and a little bit of machining done. i'd be interested in what this type of valve you suggest is, and i will educate myself on...
Thanks, that helps a bit. I know return line is supposed to be bigger. I am thinking about 3/8 pressure and 1/2 return instead of 1/2 pressure and 3/4 return. I say "handtools" but this includes an auger with large handlebars, which would need loads of torque. an auger though would be less...
I believe that standard hose sizing charts suggest a max flow rate of around 7.5 GPM for only 3/8" hose. I just thought it would be nice to have a smaller whip carrying around a chainsaw or whatever else, and you can get small motors that are rated for 4000psi, so the whole idea is scaling...
I'm using a gas motor, rpm will be fixed or very limited in range (1800 - 2800 rpm).
I can't really imagine the electricity bill of frequently starting and stopping a 25 hp electric motor
Hi all, first post. I'm building a small hydraulic power unit (25 HP) for hand tools, chainsaw, auger, etc
i'll be building the tools myself, one reason, besides cost, is because i'd like to run higher pressures than small tools are generally rated for and smaller hoses. a 4000psi chainsaw...
