>?Could also use a photo of the original knurled nut on the backgear housing that locks the housing to the spyder.
Sometimes I get lucky with finding details by looking at EBAY posting. ?For example shows the knurled knob in one of the photos. ?(I am not the seller and know nothing about the auction.)
The power feed & headstock assembly drawing (attached) from the manual also shows 2 grooves on the shaft for what looks like a detent. ?(Mine has a simple nut & through bolt which I need to look at replacing.). I think you can find the manual in one of the zip files under Files. ?If not there, hobby-machinist also has uploads. ?The file name is "AA 109_20630 Manual 2.pdf".
> I am missing the 48 tooth gear
If you don't mind 3D printed gears, there's a STL folder with models for each gear under files.
If you have time to post them, I would like to see photos of the rebuild. ?I'm not sure I've seen an armature chuck.
