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Thread: Lifting 100+kg 2 metres.
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8th May 2013, 08:46 PM #1SENIOR MEMBER
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Lifting 100+kg 2 metres.
I am in the process of re-arranging machines in the workshop. I intended to raise the 100+kg RPC off the floor and fit to a stand 2m high as last flood entered the shed and was about 50mm deep. Not good for electrics. The workshop has only 2.8m headroom; so not a lot of clearance above the RPC.
The endless chain swung from some 100x50 RHS would not lift high enough. The roof is too low for a forklift. No lifting equip at local hire place; so this morning drove 80k round trip with trailer to look at a "duct lifter". It was not suitable (mast height issues and legs projected too far forward.) Came home and sat in favorite shed chair (actually the ONLY shed chair) and pondered. Measured up the heavy duty shop made engine crane which only had 2m lift. Pondered some more.
Would you believe that I actually lifted the RPC into place with a 400mm length of 38mm water pipe. The RPC was now on a bench in front of the stand about 900mm high. I used the pipe to make an extension between the lift ram and boom. Close rigged with heavy rope as the sling was too long and it took about 5 mins to do the job.
No equipment was harmed in this exercise.
Just an alternate tip maybe worth remembering if you are in a bind.
Ken
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8th May 2013 08:46 PM # ADSGoogle Adsense Advertisement
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8th May 2013, 09:01 PM #2
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8th May 2013, 09:33 PM #3GOLD MEMBER
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Nice.
I made an engine crane a couple of years back. When I made it, I was nearly going to pin load the hydraulic ram to a pin loaded moveable collar for the very same reason. I never did and have not needed that feature YET.
Good work!
Simon
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8th May 2013, 10:06 PM #4SENIOR MEMBER
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Well Done Good Thinking.
All The Best steran50 Stewart
The shortest way to do many things is to do only one thing at once.
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8th May 2013, 10:19 PM #5I break stuff...
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Just an observation for future reference, if you were looking at one of the Genie duct lifters like below, you can actually put the 'fork' assembly on the carriage upside down. Once the forks reach the top of the first slide, they're the highest point. I used one set up like this to install a pair of 5.5 metre 250 PFC beams to support the roof in my garage extension. Doesn't help with the size of the legs though...
Genie-Lift-Duct-Lifter-247-1.jpg
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9th May 2013, 10:23 AM #6Distracted Member
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Camera broken Ken?
How did you make a rigid joint between the ram and the insert?
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9th May 2013, 02:14 PM #7SENIOR MEMBER
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Camera broke?
No; but I am
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Solid hydraulic ram shaft has 16mm cross hole for top fixing. Pipe sleeve has 2 x16mm cross holes. Top hole for boom mounting and lower one secures to ram. Pipe acts as a sleeve over the ram. The pipe not a real tight fit on the ram so I left about 75mm overlap below the bottom pipe mounting hole.
Ken
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10th May 2013, 02:42 PM #8
Took me a while to "get it" but the more I can visualise the extension to the ram, the more I like the simplicity and effectiveness.
However I am still stumped! What is a "RPC"??
All my brain is doing with the acronym is Peoples Republic of China and I know that is wrong as it is not even the acronym being used!
Sorry to hear about water in the shed.cheers
David
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A society grows great when old men plant trees whose shade they’ll never sit in. (Greek proverb)
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10th May 2013, 07:30 PM #9SENIOR MEMBER
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Thanks David, water is long gone; but still cleaning up the dried mud from under everything.
RPC = Rotary Phase Converter. Makes 3ph power from single phase with a big heavy 4kw 3ph motor, some big capacitors and other electrical do-hickeys. Allow me to use multiple 3ph motors from the one power source. One lathe uses 3 motors.
It was a "how the hell am I going to do this" moment when all else failed.
As I sat pondering in that only chair the 'light bulb' flashed on. How to make use of what I had on hand and not make any permanent changes. Thought of machining up a solid bar extension then came up with the piece of pipe. You need to do the lift in 2 goes; as the end of the boom sits at about 1 metre high at the low point with the extension in.
Ken
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11th May 2013, 07:41 PM #10SENIOR MEMBER
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HavinaGo
Pic 1 is an RPC.
Bryan
Just a common bit of water pipe with holes each end.
KenP1000944.jpgP1000945.jpg
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11th May 2013, 09:22 PM #11Distracted Member
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See NOW I get the delicious simplicity of your solution.
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11th May 2013, 10:49 PM #12
Thank you Ken,
The picture makes it clear although I again confess to having a different mental image than reality. When there was mention of a 3 phase motor and other bits, I was expecting to see the motor, wires and capacitors, kind of like a mad scientist's creation. The reality is far more professional. A neat piece of kit that should be safe from water in its raised up location.
The other observation for the night is you are in Ky and I'm currently enjoyingthe hospitality of the in-laws just up the road at "Koyuga". I use quotes as that is the address but we are well to the north west of the old town. It is a small world sometimes.Last edited by HavinaGo; 11th May 2013 at 10:56 PM. Reason: added a concluding sentance
cheers
David
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A society grows great when old men plant trees whose shade they’ll never sit in. (Greek proverb)
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