You are asking the castors to do a pretty heavy job. Get wheels like the
ones under the carts you fashioned your cart after. Take a closer look at
the Borg cart wheels. Wheels that stay perfectly round, all steel or steel
with a thin hard rubber tire, are going to provide the least resistance.
Use a "nascar jack" for brakes on the cart - pull the handle and the
weight is on the jacks and off the wheels, and the cart won't roll
away. Need to move it? Flip the lever up to drob it onto the wheels
Don't disagree w/ any of the other responses; I'd note, however, it's
likely the bearings on those casters as much as or more than the actual
diameter or tire that is the problem. Don't know what those would be
rated for, but 1500/4 -->pushing 400 lb/each. I'd reckon that's
probably at or beyond their recommended loading.
Alright.. so a little background on why as 20-sheet cart.
I wanted something I can slide a sheet out partially and have a look
without re-arranging the entire stack. A few years back I found 10
birch-maple sheets for $20/each or so. Then there is the misc 10
others -- a few MDF, few 1/2, few OSB, cutoffs, etc. I wanted to be
able to push the cart against the wall, but then pull it out, spin it
around, etc, etch when chosing a sheet.
It's based on this one, http://www.scrgeek.com/woodwork/storageSheets.html
I swapped out the pvc pipe with conduit pipe of smaller diameter (more
ridigity with less diameter). moved the T-verticle supports about 24"
in from each end, made the base 2' wide (as narrow as possible), and
beefed up the internal bracing.
I wanted to conserve floor space, so I made the cart 2 foot wide.
Less the 3.5" for T-support, less 2x3/4" for pipe verticals, less
2x1/2" on the outside, leaves about 18" of max useable deck space. So,
in theory 24 sheets. If I used the extra 4 spacer conduit, that would
consume another 4x3/4" for a min useable deck of 15". So about 20
The key to getting decent casters at HF is to hand pick them by checking
how tight the bearing assembly is. Some are a lot tighter than others
and the loose ones can loosen more under weight, making them difficult
to turn. I've even had some lose their bearings, altogether.
"Playing is not something I do at night, it's my function in life"
What about adding more 5" casters? I have a plenty -- I could add 4
more and further distribute the weight? The four now are located 48"
apart , 2 foot from either end of the platform (where the T support
fastens). Maybe I add one to each corner of the platform.
If you have problems moving the cart straight ahead when all the
casters are aligned in the same direction, then either the casters are
overloaded or you need to eat some more to beef up as you don't have
enough mass. The first scenario would benefit from extra wheels.
Your wife will have input on the body mass thing.
If the problem pushing the cart around is primarily turning the cart
when the wheels aren't aligned, more wheels may help or may hurt.
Since you have plenty of casters, throw some more on as a test and
find out if that helps or hurts.
It could help. Some of the problem is the squish of the tires, so
either replace them with much harder tires (polyurethane is wonderful
here, just don't use it for a finish ;) or add more squishies.
I use 5" casters by default and they allow me to roll over my air hose
if need be, and to overcome debris on the floor (as if I'd ever let
that happen in my shop...)
Live in the sunshine, swim the sea, drink the wild air...
-- Ralph Waldo Emerson
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