Can anyone tell me for CERTAIN if this is possible?

For certain it depends.
On the hole pattern in your cast iron and the patter for a different router. You can download most router hole patterns. If there is a difference drilling cast iron is easy.
It also depends on the underneath side of the cast. Is there any ribbing that would interfere with a larger router base? If it all looks good then I would consider this router. It has above table bit removal and a built in router lift.

I would imagine that just about any router would fit. Most Routers have both 1/4” and 1/2” collets.
So not really an issue there. But more with how the routers base attaches to the table. And for the most part
they are pretty universal.
Can you post a photo of the underside of the table?

-- John

if “upgrading” is going to a 1/2” collet, is a 1/2” collet available for the router you have?

and yes- it is certainly a possibility. :)

for certain?

In French we say “les conseilleurs ne sont pas les payeurs”

-- Sylvain, Brussels, Belgium, Europe - The more I learn, the more there is to learn

Anything is possible with a big enough hammer.

Pretty much guaranteed you will need to drill new holes.
Go look on the underside to see how much free space there is. Then look at the specs of router bases. I have the Tridon as mentioned above. Very nice but not cheap. It needs an additional hole drilled for the lift crank.

For a smooth top, you can fill the old holes with JB-Weld and sand smooth.

Does your table have inserts for the router hole?

While you are at it, make yourself some zero clearance blade inserts with a riving knife. ( or micro-jigs) By far the biggest safety improvement for an older saw like yours.

Thanks for the replies. tvrgeek, the blade inserts are not necessary as this saw is exclusive to dado blades only. My primary table saw has inserts, thanks. I intend on taking the wing off this afternoon and taking a long look at the underside. I’m going to figure out if it is compatible to other routers. I do not know if a 1/2” collet is available for the inexpensive Craftsman router that is mounted on it now.

You’ll know for certain when you do that!

-- Everything is a prototype thats why its one of a kind!!

Ah, a luxury!

Bigger collets let you spin bigger bits, but they need more power. My old Craftsman router collet is not replaceable anyway. The one feature I like is the spindle lock is the power switch, so easier to reach when I had it mounted n a DIY table. My Tridon is a little clumsy to reach, though I am going to extend the rod to make it easier.

Snap a picture of the underside with a ruler in the frame. Taking the wing off is a lot of work. ( Just put one on my Ridgid)

“Bigger collets let you spin bigger bits, but they need more power.”.... Yep! And that is the motivation to upgrade the router. You are right about removing the wing, I have relocated it 3 times now. First, I attached it to the wrong side of my table saw, and remounted it on the other side. Next, I got this saw to use exclusively with my dado blades, and moved the router again! It is a lot of things, but light s not one of them!!