These rotary unions are typically installed on the center table of pallet switching CNC machines and used to feed air and hydraulics from the pump to each pallet. Kits are available that include an adaptor, fittings, pressure gauge blocks, and hard lines to install hydraulic infrastructure onto your CNC. These rotary unions are generally attached to a spacer and bracket system on the rotary table to allow air and hydraulics to the trunnion fixture. Custom spacers are made to order based on the number of passages needed and the rotary table model.