How to Choose a Hydraulic Filter for VMC Machines
A VMC runs separate hydraulic and coolant circuits. Here is what to check before you replace either filter.
Know which circuit you are filtering
A vertical machining centre usually has two separate fluid circuits: a hydraulic circuit for tool changing and clamping, and a high-volume coolant circuit. They need different elements, and a filter chosen for one will not protect the other.
Match the rating, not just the size
Two elements can share the same dimensions and still filter very differently. The media and its rating decide what the element catches. The machine builder's manual or the old element's part number tells you what the circuit was designed for, and a replacement should match it.
Check the pressure and the seal
A pressure-line element must withstand the circuit's working pressure and its spikes without collapsing. Check that the replacement is built for the same duty as the original, and that its seals and end caps match the housing, or oil will flow around the media instead of through it.