Aabendick, Welcome to the Shopsmith Forum.
There is a lot of information to be found here about all things Shopsmith. One of the first that will help you is a manual if yours didn't come with one. The third link edma194 gave you has 3 of the Model 10 manuals available in PDF's at the same place as the Survey. There is only three of the manuals available there but there were over 10 different ones published to cover the changes made on the Model 10's. One thing to keep in mind about the Shopsmith Model 10E and 10ER was they were a work in progress. There were many changes to the different parts from their introduction in 1947 until they were discontinued in 1953 and replaced by the Mark 5. I have found that some parts never changed but there are up to 7 versions of other parts. If you want more specific information about your 10ER post the serial number and we can give approximate production dates and which manual will best match your Shopsmith.
Mark V completely upgraded to Mark 7
Mark V 520
All SPT's & 2 Power Stations
Model 10ER S/N R64000 first one I restored on bench w/ metal ends & retractable casters. Has Speed Changer, Model 4E Jointer, Jig Saw with lamp, a complete set of original accessories & much more.
Model 10E S/N 1077 oldest one I have restored. On bench w/ metal ends & retractable casters.