LAMPSguy
Well Known Member
First, this is to shim (prevent from wobbling) a workbench, NOT level it. Level would be to have the bench top normal to the gravity vector. This technique will just prevent your bench from developing a wobble.
Background: A plane (in this case your garage floor) is defined by three points. But three points of contact are unstable for a bench. So, how to have 4 points of contact (stable) act as three to define the irregular plane of your garage floor?
See picture (ignore poor drawing skills)
As you see, the two casters on the left are fixed, as well as the two on the right. The two on the right though are free to pivot around the bolt to "self shim" for floor irregularities. If you have an extremely problematic floor to deal with and worry about stability, standard screw-type levelers can be used just inboard of the right casters as "overtravel bump stops" and you just set for how much clearance you want.
Background: A plane (in this case your garage floor) is defined by three points. But three points of contact are unstable for a bench. So, how to have 4 points of contact (stable) act as three to define the irregular plane of your garage floor?
See picture (ignore poor drawing skills)
As you see, the two casters on the left are fixed, as well as the two on the right. The two on the right though are free to pivot around the bolt to "self shim" for floor irregularities. If you have an extremely problematic floor to deal with and worry about stability, standard screw-type levelers can be used just inboard of the right casters as "overtravel bump stops" and you just set for how much clearance you want.