the all aussie dribble thread!

Arborist Forum

Help Support Arborist Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
find the specs on the pump and ram as there is no standard for the "30T'" rating
It seems like it's kind of similar to watts/rms on speakers, cheap ones give big watts and have bugger all rms, good publish real watts and have actual rms

trouble here is what is real???

Well it's all down to the specs of the pump and the cylinder bore....

Most pumps will do around 3000psi max without issue, some do 3500 and some a little more....2 stage pumps will do that but will hi flow in the first stage making for quicker cycle times.....

Just multiply the max psi by the cylinder bore and that will give you its exact tonnage...

eg....a 3000 psi pump and a 155mm bore (6") the math is as follows...

Area = pi by radius squared

Therefore, A = 3.141596 by 3

Area = 28.2743 sq. Inches.......multiply that by psi and that equals 84,822.9 lb of force

Convert to metric ton = 38.475 ton for a 3000psi pump with 6" bore



3500psi pump = just under 45 metric ton..
 
Well it's all down to the specs of the pump and the cylinder bore....

Most pumps will do around 3000psi max without issue, some do 3500 and some a little more....2 stage pumps will do that but will hi flow in the first stage making for quicker cycle times.....

Just multiply the max psi by the cylinder bore and that will give you its exact tonnage...

eg....a 3000 psi pump and a 155mm bore (6") the math is as follows...

Area = pi by radius squared

Therefore, A = 3.141596 by 3

Area = 28.2743 sq. Inches.......multiply that by psi and that equals 84,822.9 lb of force

Convert to metric ton = 38.475 ton for a 3000psi pump with 6" bore


3500psi pump = just under 45 metric ton..


Pumps will do high pressure no problem, thats what they are designed for. However every hydraulic system has or should have a relief valve or you will blow hoses/seals in the first 5 minutes. The majority of the commonly used control valves have their relief valve set at around 2500psi to be on the safe side. Also chinese hydraulics are usually only rated at 3000psi max so if they were smart they wouldn't be running their splitters anywhere near that for warranty issues etc.

So as a rule of thumb you can almost halve the advertised tonnage of your average splitter on ebay etc to get the true value.
 
It's each to their own!
When I was in the local saw shop spinning spanners, 1 of the local pro's came into the Drs next door.
Been drop starting for years, his 394 locked up on compression causing it to brush his left shin bone.....17stitches later he was good to go.
The saw never fired, so was not even running when this occurred, twas a nasty gash,Oregon cjx chain if my memory serves me correctly.
Cold starts on the ground 4 me, hot start between legs :)

We all know the safety issues involved with the drop start yet most rear handles have no where to fit a man sized boot and I also start with the handle between my legs but being a bloke with odd proportions this also can be an issue
 
On another note, what's a good price to get your chain sharpened by the shop....all my chain is full comp chisel or semi chisel round cut...

Ive now got a heap of dull chains with odd tooth lengths from hand filing them and thinking i should just get em all done and brought back to the same size.
How many is 'all'. any thing up to $20 each flat out more q
Is it going to come to more than the $50 for a OZ racing grinder or ~$100 chicom(511) alloy plus a jakmax wheel and polish with file if needed
For mods like shims' and clamps Check out the harbor freight grinder thread and the like,
I just got a tecomec speedsharp and after mcw fixes me up with the wheels I'll still have change from$200, otherwise they were on my radar


Unless the shop has a silvey
 
Just some of the junk that kitties bring in
a9ea947dd2d6aa0ba98ff8e8a5f45e15_zpslk1yisyl.jpg


fa1291f004f7be5fbaab58e966735e11_zpsuriappiq.jpg


60c863afc1686056a7ccd599b887c446_zpspnvxl7yp.jpg
 
Hates the best way to fix this 394 wire
Crimp a extra bit of write it does the whole thing bed to be replaced.
Also may get this ported at some point

Just solder another crimp on the end or solder the wire to the switch, put that self tapper screw back on the earth and bobs your uncle, no need to replace the whole wire. :)
 
Just solder another crimp on the end or solder the wire to the switch, put that self tapper screw back on the earth and bobs your uncle, no need to replace the whole wire. :)
Thanks Neil, I'll do that
It looked like it had been soldered directly 3 times before, now it won't reach, the earth screw is on the bench as well. Just had it out to clean it up
 
Back
Top