The blade on my Skilsaw model 5150 wobbles quite a bit. I can tell the wobble is coming from the shaft itself. (I can grab the shaft and wiggle it around quite a bit — the result of the "looseness" in the shaft is about a 3/16" wobble on the rim of a 7-1/4" blade.)
I found this diagram: http://www.ereplacementparts.com/skil-5150-type-f012515000-714-circular-saw-parts-c-130_160_831.html, but I can't tell what part is supposed to keep the shaft from wobbling.
Any suggestions are appreciated.
Best Answer
If you're sure it's the shaft that's loose, and not a misalignment in the blade attachment, then it's most likely one of the bearings supporting the shaft that's bad. Check for play in the bearing flange (Component 36). If that's solid, then check the bearing sleeve (component 13). Unfortunately if it's the armature that's damaged (component 3), then you're better off buying a new saw.