Lifting using chain
Lifting using chain
(OP)
I need to lift an engine/trans (800lbs) and because of the design I need to lift it using chain against a casting (heads). Is this a bad idea? (See attachment)
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RE: Lifting using chain
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
RE: Lifting using chain
RE: Lifting using chain
How deep are the tapped holes into the casting? What diameter tapped threads and what thread type? NOT NPT! Can you test pull the threads before putting your life (your hands or head) in the line when the casting breaks?
First, try to get the two (?) or four chains so they are coming in vertically to the tapped threads.
Don't EVER stand or walk or work UNDER the lifted engine, nor pass it over top of anything you can't replace.
Add safety (backup straps) as soon as possible after the engine is accessible so the safety straps are independent of the tapped holes: they should go from the hook, under the engine, then back to the hook.
RE: Lifting using chain
RE: Lifting using chain
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
RE: Lifting using chain
RE: Lifting using chain
Use some lift rings like those found at Carr-Lane
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and multiple chains of suitable strength. Or find a fab shop to make something suitable out of angle iron sections, with suitable holes drilled in it.
TygerDawg
Blue Technik LLC
Virtuoso Robotics Engineering
www.bluetechnik.com
RE: Lifting using chain
RE: Lifting using chain
See, the first 1-1/2 female threads in the casting are going to provide almost no strength: they are half-cut, if that, and the typical hole begins slightly oversize at the opening. The first 1 to 1-1/2 male threads on the tip of the bolt are also understrength - since they are also not fully cut, so they won't engage fully into the female threads of the casting.
Net result is increased stress in the few engaged threads in the casting, right at the point where the stress from the entire bolt is trying to "pop" the casting metal out.
RE: Lifting using chain
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
RE: Lifting using chain
RE: Lifting using chain
Patricia Lougheed
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RE: Lifting using chain
RE: Lifting using chain