I've been working on a new workbench design for awhile.
My old workbench is aging. It is an island workbench made out of 2x4s, and it has a simple 4x8 OSB sheet on top. I made some crude caster wheels that pop out, but that design never worked very well so I hardly ever moved my island workbench.
The past many weeks, I made a new design and built it up. I improved the retracting/extending casters, and am very pleased with the results. I can pull the handle about 12 inches, and that moves the workbench up about half an inch - - that's alot of mechanical advantage.
And once the casters are down, my linkage is locked in place with a 3 point over-center linkage. It all works just beautifully.
See my video below for how my linkage works:
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