I inherited an old Crescent 8" light jointer from the 1940s. According to the manual I found for this jointer it says the jointer uses SKF 1204 bearings (self-aligning or spherical ball bearings). I checked the manufacturers website with no luck. The jointer is fitted with cups for lubrication that don't have screw top lids so no grease. The bearings are still in good shape so I don't plan to replace them. What is the best lube to use for this jointer? TIA!