Are the mounting holes on the square base of the MaxxMacro Pneumatic Chuck MM-PCMPx003 precision-fit for a tube dowel? Why are jack screws needed?

The mounting holes on the square base are not precision-fit for tube dowels by default. The included jack screws are used to help level the chuck and ensure it sits perfectly perpendicular to the spindle. This is important because not all machine tables or fixtures are perfectly flat. The jack screws allow for fine adjustments during installation, helping to achieve precise alignment and optimal performance.