I have an older XY positioning table that is stamped Made in Sweden and sold by Willis Machinery. It's probably 25-30 years old, I've had it for 15 years. It has just started to give me some trouble, the lead screw on one axis will intermittently lock up. There is no rhyme or reason to it. Happens in both directions, works fine for awhile then does it multiple times. Usually just backing off a half turn will get it going again, sometimes I have try that several times to get it to clear. I've determined that the problem is in the bearing housing, I'm just not sure how to get it apart. I assume that the lead screw/ bearing assembly is a press fit into the housing, just don't know for sure which direction . I really don't want to break a casting. I suspect that these were imported and sold under different names, so maybe somebody has some experience with them and can give me some advice.