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16mm od steel tube for use as a trolley axle.
What "specification" should I be looking at on eBay?
mm thickness?
"ERW"?
"Mild"?
"Black"?
two axles with 500mm between wheels, taking about 100-200Kg max. 4x wheels with 2x bearings each through which the axles will pass.
diagram?
(how is the axle supported on the chassis?)
(i assume there's a chassis...)
Assuming the bearings are close to the wheels the principle stress will be shear. You aren't anywhere close to the max shear stress of any steels, even with stupidly thin wall section on the tube.
So I would use whichever is the easiest for manufacturing, probably ERW or BDMS. Just make sure it is 16mm not 5/8"!
diagram:
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M16 washers, split pins, wooden chassis with retaining screw through axle.
cheers guys.
If the wheels are specc'd for "16mm axle", would 5/8" be too big then?
SO bog basic, mild steel, ERW, ought to do it? Thanks
If the wheels are specc'd for "16mm axle", would 5/8" be too big then?
Too small, the bearings would fall off!
ach, I'll just pack it out with a coke can shim 🙂
ERW electric resistance welded = standard tube production - sheet rolled up and welded - for a nuclear sub i'd go cd = cold drawn = solid extruded
Black = as it comes after manufacture = not polished =
Mild = mild steel = pretty vague - but not an alloy steel so strength is limited
5/8" = 15.88 mm so not 16mm
is it strong enough no idea not an engineer - ex process metallurgist but never did loading calcs
i'd buy a metre of 5/8" solid stainless rod
why rod over tube?
Thanks for the help guys. In the end I got some 16mm bar from local agricultural engineers - £3.50 for 1.5m! Bargin!
Anyway, Stoner's new Log Bag Bogey is arrived. Works great. Works even better now it's got 30psi rather than 3psi in each wheel 😳
Top deck is removable so that I can use the bogey for strapping and carrying 12' cord as well.
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That's about 250Kg on there. About the limit for pulling across a wet field.
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Cool thing.
Wouldn't it have made more sense (from a strength point of view) to have the boards on top of those beams though?
yes, but a) would require more board and b) the rail edge helps stop the bags sliding off the sides.
Having the boards on top would be [i]stronger[/i], but having them below they are [i]strong enough[/i] AND solves a few other problems.