Badtheba asked these two questions:
Are both of your jointers model 4E, or newer, with holes for SPT mount rods? I'm wondering if the newer jointer models with the SPT rod holes still had the holes for mounting to the cast iron adapter plate for use with the 4E headrest, or if they had to be drilled to be used like in the last picture I posted of Scott Grune's 10ER.
Also, what would the jointer mount to using the cast mounting holes circled in my picture below? Was it ever intended to be run from its own base and motor?
The answers:
The 4E Jointer of course had the holes for mounting it to the Model 10 Jointer Headrest since that was the only way to attach it. The Model 620 Jointer, like Scott Grune's Model 620 Jointer shown previously, added the SPT mounting posts but still had the holes for mounting it to the Model 10 Jointer Headrest. In the photo is a 620 Jointer from 1957, notice the hole next to the plate. When the 620-C Jointers came out Magna had discontinued the Model 10 Jointer Headrest Mounting Holes. The Base/Out-feed Table is the part that changed between the Model 4E and Model 620 Jointers adding the SPT mounting posts.
The holes circled in the picture could be used along with a third hold on the other side of the cutter head underneath the table to mount the Jointer to a home-made bench.
Of note: the 4E Jointer with drop down headrest comparison.png from Everett above is not a picture showing a 4E Jointer but a 620 Jointer mounted on the Model 10 Jointer Headrest.
