Random pic thread.

snake.jpg
 
RatLabGuy said:
Indeed. I'll say that thing was a pretty interesting home booty fab contraption.... A big A frame on 4 wheels on rotating casters, no wheel locks or anything. But you can't see is the whole yard is a pretty steep hill. Takes some creativity and profanity to roll around the yard and keep put, but damn nice to have.
At first were a bit skeptical of the manual chain lift, but it probably had a 100:1 gearing or something and worked great.
Once we had it out and dropped it on the ground, they just used a forklift to haul up to the cashier and dropped in my truck. Easy peasy.
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It's called a chain fall, very common back in the day. I think I still have one
 
R Q said:
It's called a chain fall, very common back in the day. I think I still have one
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Do they use a worm gear? Aside from the insane gear erduction it would also prevent it from being backdriven and falling. First I've used one in this kind of application.
 
RatLabGuy said:
Do they use a worm gear? Aside from the insane gear erduction it would also prevent it from being backdriven and falling. First I've used one in this kind of application.
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I've no idea the inner workings. But I've got 4 in the work truck and we have a connex full of them from out field crews. They'll wear your arms out flying stairs up 3 floors, buy it beats the alternative. They finally got smart and bought a 150' electric chainfall. Throw up a beam across the shaft and you're set for 10 floors.
 
R Q said:
It's called a chain fall, very common back in the day. I think I still have one
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Mine is slow as a turd but haven't found anything it want lift.
 
RatLabGuy said:
Do they use a worm gear? Aside from the insane gear erduction it would also prevent it from being backdriven and falling. First I've used one in this kind of application.
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Skip to about 1:45 into the clip.
 
WARRIORWELDING said:

Skip to about 1:45 into the clip.
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Ah so it has that little pawl in it to prevent backdrive.
I can't quite wrap my head around how it can gown both ways manually though.
... I'm really curious why a series of srockets/gears is preferable to a worm though. You could achieve the same thing with only 2 parts.
 
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