I doubt I'm being original here but I couldn't find this being done this way before (google ***** now). It's a variation of washing machine leveling feet. This approach relies on your machine/table having mounting holes for stem casters. It may require you to open up or fab said mounting holes for the larger jack bolt. You can in theory ditch the jack bolt altogether if your casters are sufficiently girthy and long (no pun).
A) Caster w/thrust bearing (it really helps to have a thrust bearing though doubt they make casters w/o them now a days, turning the jack bolt may prove impossible otherwise as the wheel tries to turn). A spare jam nut here helps if the thing you're moving runs the risk of loosening.
B) Upside down bolt (head). This head is either tapped to accommodate the caster thread or in my case bored and nut welded on. It may require you to cut down the caster stem to avoid drilling past the head bolt and potentially ending w/too thin a wall in the bolt.
C)Your table/machine mounting plate & weld nut
C.2) Not pictured; jam nut...loosen to jack bolt up/down
D)hex nut welded smaller than minor diameter (or milled) for ratcheting jack bolt.
I used 3" urethane casters because I started w/a base from the PO that I then decided to scrap. In hindsight, iron casters would've been a better choice but the urethane wheels allow me to add brakes to the outer wheels.
A) Caster w/thrust bearing (it really helps to have a thrust bearing though doubt they make casters w/o them now a days, turning the jack bolt may prove impossible otherwise as the wheel tries to turn). A spare jam nut here helps if the thing you're moving runs the risk of loosening.
B) Upside down bolt (head). This head is either tapped to accommodate the caster thread or in my case bored and nut welded on. It may require you to cut down the caster stem to avoid drilling past the head bolt and potentially ending w/too thin a wall in the bolt.
C)Your table/machine mounting plate & weld nut
C.2) Not pictured; jam nut...loosen to jack bolt up/down
D)hex nut welded smaller than minor diameter (or milled) for ratcheting jack bolt.
I used 3" urethane casters because I started w/a base from the PO that I then decided to scrap. In hindsight, iron casters would've been a better choice but the urethane wheels allow me to add brakes to the outer wheels.