Having used inline wheels for a lot of oddball applications, I think the
previous poster had a better idea, that of using skateboard wheels.
First, the skateboard wheels are wider and will spread the pressure across a
wider area than an inline wheel. Second, the skateboard wheels are usually
made of a harder plastic material to begin with, and will not deform as
much. Using even the harder of the available inline wheels, they will flat
spot very quickly when supporting a static load. Trying to get them to roll
after an extended period of time in a static position will be a real chore.
If you aren't going to use some sort of major hinge or bearing (vertical)
and are looking to support from the bottom using some sort of rollers, you
want the hardest material you can get, so you won't get flat spotting when
the "door" is just sitting there. I'd suggest as a minimum, the use of the
skateboard wheels the previous poster mentioned, however, I might tend to
use a steel wheel or roller, against an inlet steel plate on the bottom of
the "door" object. Of course, this won't be the quietest operating item,
but at least it would move nicely.
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