The spindle in my 1J appears to have what I think is axial runout. Using a precise drill blank and quality collet, I get about 0.002" runout near the collet, increasing to about 0.005" when I measure 3 inches further down. I used 2 different drill blanks and 2 different collets and averaged the results.
I hoped there might be a burr or maybe that the guide pin was sticking out too far. The guide pin possibility looked even better when I saw that the high spot was aligned with the pin. I thought maybe the pin kicked the collet out when it was tightened and tilted the bottom towards the high spot.
Unfortunately, none of the easy problems panned out. So what is the most likely cause? Bearing misalignment? Screwed up socket in the spindle? Bent spindle? I think it has been this way since I got it about 6 months ago - I just didn't realize it until I tried to do some precise drilling.
I'm assuming that if I have the head rebuilt, this is something that would be fixed during the rebuild? Can anybody recommend a good rebuilder near central Ohio? There is a rebuilt head on eBay, but it's in Florida. Shipping would kill me.
I would greatly appreciate any ideas or suggestions. I suppose I've learned a bit if nothing else...