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DK

wrote:
On Mar 6, 8:46 pm, DK wrote:
wrote:
On Mar 6, 12:34 pm, Tim wrote:
I would think that even light (50-100cc) motorcycle chain would work
very well. Even packed full of mud and grit, under hard accelerated
torque, they put up with a lot more than 100 lb loads.
wrote:
Hey, Gene, I'm making a lift, sort of a dumbwaiter if you will. My
bar, screen room, patio, deck and pool are in the back of my house,
which is a daylight basement. Above is a deck coming off of my kitchen
one floor up. So, I'm thinking of using #25 carbon steel roller chain.
I'm guessing that the load would never be over 100 pounds on this
thing, unless my kids get to using it as an amusement ride! So, I got
to thinking, I wonder what the ultimate strength of #25 roller chain
is in tension? Do you have any idea where to find this information or
do you happen to have it handy? Thanks!- Hide quoted text -
- Show quoted text -
Yeah, I'm suspecting #25 to have an ultimate tensile strength of
around 700 pounds or so, so if the sprockets engage at least two teeth
fully, it should hold my two kids on it!!
If they use the typical 4:1 ratio of ultimate to allowable loads then
you better have two kids weighing a hell of a lot less than 700#
combined. That would have to be 87-1/2# each. Are you including the
"dumb" kid in this equation (maybe your word was "stupid")? He might
moronically swing around too much and strain the chain.

Hire an engineer.- Hide quoted text -

- Show quoted text -

4:1 isn't "typical" of anything you idiot. And you do realize that
there are sprockets involved don't you, idiot?

That last sentence what incomprehensible.

*TWO* sprockets? What does that have to do with the chain, Sally?