Bigger Wheel for Roll-around sheet goods cart

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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.
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@swbell.dotnet says...

Remember also that a wheel that works perfectly well in daily use like at the Borg may flat-spot if it's sitting in the same place with a load on it for months at a time.
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On Sun, 16 Jan 2011 14:22:20 -0500, "J. Clarke"

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 and push.
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woodchuck wrote:

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.
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Contact me off list.
Lew
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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 sheets.
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Shop floor is concrete.
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woodchuck wrote:

I think these two 8" casters will do the job. I have 4 on a 1,500 lb (load, not weight) warehouse cart and they work swell:
http://www.harborfreight.com/8-inch-cushion-tire-swivel-caster-46818.html
http://www.harborfreight.com/8-inch-cushion-tire-fixed-caster-46817.html
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On 1/17/11 3:22 PM, HeyBub wrote:

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.
--

-MIKE-

"Playing is not something I do at night, it's my function in life"
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You're talking to HeyBub about losing one's bearings? Now, that's funny!
R
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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.
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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.
R
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wrote:

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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I used 2" dia.*steel* casters on mine. It rolls easily. http://tinyurl.com/ylbcfqw
Max
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