C W Burfle posted:1) Square up the plate on a drill press.
2) Drill out the bearing with an appropriate bit (in this case, a #12 bit, .1890 inch diameter).
3) Press bushing into place. Secure with ACC or epoxy glue.
Maybe I am over thinking this.
Getting the drill bit square with the brush plate is no big deal. positioning the hole is what I was thinking about. I guess one would assume that centered on the worn hole is the correct position?
Oilite bearing are oil impregnated, will glue stick?
I saw some .125 ID flanged oilite bushing on EBay. As was pointed out earlier, they might not fit between the brush holders.
Some time ago I though somebody wrote about using brass eyelets.
Machining my own parts is not possible for me, and I suspect for many other folks. I don't have any machine tools.
It's as if you guys reached out and probed my brain!! That is one of two methods I was considering, the other being to leave the armature hole as is, and just slip the bushing over the shaft and glue in place. Not as physically strong as pushing the sleeve into the brush plate, but it might hold. I don't think I would use any super glue, too thin, might run down into places it doesn't belong. Epoxy is the ticket for me.
So in an effort to see just how much room I have, between the brush holders, I used a 600-129 nylon thrust collar as a test gauge, and had to trim the edges to fit between the solder tabs. This nylon collar measures 0.212" OD. It seems to fit ok and if it were metal, wouldn't short the brushes. I think it's quite possible to flatten (Dremel) two sides of the 622-129 (metal) bearing sleeve near one end, just enough to clear the solder tabs, then glue in place with epoxy.
If I thought that epoxy would hold the nylon collar in place, I might give that a go also, just to see how it does! Nylon wouldn't be much of a bearing surface, but then neither is the fiber board Lionel used! Must not be much in the way of side loads on that shaft.
Norton - to your point, I found one very thin band of wear on the armature shaft, and it measured 0.001" smaller than the outer portion (0.024" vs. 0.025") Best I can do, measurement-wise!
