: Listen for grinding or high-pitched squealing, which indicates bad motor bearings or drive belts.
: Turn the tracking knob to see if the blade moves predictably to the center of the wheel. Test the tensioning mechanism to ensure it isn't stripped or binding. 3. The "Power On" Test
: Check the table with a straight edge for flatness. Inspect the frame for cracks or any signs of past welds/repairs that could affect stability.
Saws used for heavy resawing face more motor strain than those used for light scrolling.
: Ensure all side and thrust bearings spin freely and aren't seized. If they are stiff or grind, they will need replacement.
Industrial saws often require 220V or three-phase power, which may not work in a standard home garage without a converter. 2. Mechanical Checklist
Specifically, ask about the trunnions (the brackets that hold the table) as they are often cast aluminum and can be difficult or expensive to replace if cracked.
: Open the covers and spin the wheels by hand. They should be balanced and not wobble. Check the rubber "tires" for cracks, dry rot, or deep grooves, which will cause vibration.