On Sep 13, 12:13*pm, JR North wrote:
It depends. 4 swivels are less stable to tipping moments, but make the
cart much more easily positioned.. *2 fixed; much more stable, but
often means you need to maneuver the cart due to the restriction of
movement 2 fixed wheels cause. Take your pick.
JR
Dweller in the cellar

On Sat, 13 Sep 2008 16:41:27 GMT, Grant Erwin

wrote:
I'm designing a cart for a Miller DialArc HF plus Miller TIG cooler unit..

I just wanted to hear if you guys would use 4 swivel casters or 2 swivel
and 2 fixed, and why.

Grant

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Wise words about the tipping potential...

Earlier I picked up a heavy cart with all four wheels swivel...and who
ever build the cart place the wheels far inside the perimeter of the
cart. I recently had about 400 pounds of drill presses on the cart
when it decided to tip...excitement and curse words galore as it went
over in slow motion with me serving as the counterweight.

Other than a few bent brackets, crushed condensers and scratched paint
everything and everyone was all right.

The cart is on the top of the to do list to be redesigned for safety
and two RIGID casters.

FWIW...I had been in such a hurry that I forgot to check the placement
of the casters before using the cart....an example of how one's
stupidity can get you hurt.

TMT