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carcru
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Join Date: Apr 2007
Posts: 26

lifting a 200 lb load

02/25/2008 1:06 PM

Is there a way to lift a 200 lb load that's hanging by a chain without using any hydraulic or pneumatic device? Would it be possible for someone to adjust the height (vertically) of this item with a purely mechanical device? Perhaps by means of a pulley?

Any ideas?
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CSM Engineer
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#1

Re: lifting a 200 lb load

02/25/2008 1:27 PM

I think what you're looking for is a block and tackle - here.

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ffej
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#7
In reply to #1

Re: lifting a 200 lb load

02/26/2008 1:30 AM

Where do you put the batteries? ffeJ

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ozzb
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#2

Re: lifting a 200 lb load

02/25/2008 5:31 PM

Yeah a chain hoist. They come in different load sizes. They hold the load stationary

This one will hold 3000 lbs

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CSM Engineer
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#3
In reply to #2

Re: lifting a 200 lb load

02/25/2008 5:41 PM

Duh, should have thought of that myself...

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cnc jim
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#8
In reply to #3

Re: lifting a 200 lb load

02/26/2008 6:28 AM

Duh, should have thought of that myself...

That's such a useful phrase.

I have loads of polystyrene sheets, sent in packaging, and wanted to use it for insulation at home, but I didn't know if it was fire retardant, and couldn't think of a way of finding out....my mate said 'Put a match to it...'

Duh, should have thought of that myself...

jim
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ddk
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#4

Re: lifting a 200 lb load

02/25/2008 7:36 PM

I can generally lift that much by myself. Why are you looking for additional help?

Is this a factory setting?

A personal project?

A homework problem?

Some feedback would be appreciated!

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Johan van Niekerk
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#5

Re: lifting a 200 lb load

02/26/2008 1:06 AM

The answer is yes.

The question is what exactly do you want to do?

You could use a chain block.

You could use a lever.

You could use a screw (threaded rod and nuts) if you want more control.

You could use a counter balance.

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jdretired
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#6

Re: lifting a 200 lb load

02/26/2008 1:12 AM

There are hooks specifically designed to lock into chain links for lifting, you could use a Turnbuckle assembly with elongated clevises for final adjustment, after first use a load binder, this will free up some links for you.

Regards JD
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Anonymous Poster
#9

Re: lifting a 200 lb load

02/26/2008 7:06 AM

Keep one Pataan (One of Pakistani)
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Anonymous Poster
#10

Re: lifting a 200 lb load

02/26/2008 10:22 AM

If it is just 200 lbs a beam and balance with a movable counter weight will do it.

h2om@hotmail.com
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PWSlack
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#11

Re: lifting a 200 lb load

02/26/2008 10:24 AM

http://www.low-cost-cranes.com/

Like this, perhaps (other crane equipment suppliers are available)?

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jmart23
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#12

Re: lifting a 200 lb load

02/26/2008 3:47 PM

You can twist the chain and with each twist you will raise the load a very small amount.

I once pulled a pickup truck of a mud bog using a long chain and a large wrench.

Really, you would use a chain fall or a come-a-long to easily position the load.
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Anonymous Poster
#13

Re: lifting a 200 lb load

03/01/2008 11:39 AM

thanks to all for their comments! I think the idea of using a powerscrew is interesting. I am looking to be able to raise/lower the 200 lbs by no more than 6 inches. No electrically powered devices are allowed, so I think this rules out chain hoists and some winches. However, I think a power screw or a counterweight system may be the method of choice.
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jmart23
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#14
In reply to #13

Re: lifting a 200 lb load

03/01/2008 6:11 PM

Chain falls (chain hosts) and come-alongs are manual powered. Also block and tackles are very efficent and are man powered.

Gee - 200 lbs six inches! I would just pick that up with out any mechanical means!
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Users who posted comments:

Anonymous Poster (3); cnc jim (1); CSM Engineer (2); ddk (1); ffej (1); jdretired (1); jmart23 (2); Johan van Niekerk (1); ozzb (1); PWSlack (1)

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