Hey Randy I would use glue to attach the hard board.
The plywood on the aluminum as you mentioned was the same as I was thinking initially.... The possibility of using only Masonite became my thought at some point. If that doesn't feel like it will work, then the plywood will be used. I can't get arctic birch anywhere locally, but some high layer cabinet grade might be stable if sealed up well.Off topic...
Each time I see a picture of Mike's dueling routers table, I intuitively love it... and I wonder what I'd do with a two router table setup. Of course this is coming from a guy who joined the forum less than two months ago for advice on his first router purchase and I've thus far resisted the temptation to buy a second. :smile:
Back to topic, if I was attaching 1/4" masonite atop an aluminum frame for a router table, I'd want very close support spacing and I'd want the router attached to the aluminum and not the masonite. If the aluminum supports were spaced 4" apart, I'd be comfortable. At 6", I think the masonite would deflect under pressure. My brain is much happier thinking of my tools as not moving at all, so I want movement below perception level.
I'd feel much better about the whole thing with the masonite attached to at least 1/2" plywood, and I'd screw the plywood to the frame from underneath. And if not for the support structure mentioned, I'd use a double layer of plywood as others above suggested.
You'll get more experienced advise from others though. I'm still a router newbie.
I like that, Stick.double stick tape for the field and 4 corners for the screws..
I did a aluminum torsion frame from 1/8'' architectural C channel only the butt joints are draw bolted not welded...I like that, Stick.
I'll see if I can draw up a sketch of the frame idea. I have a friend that's an excellent welder. I just need to cut the aluminum pieces accurately.
I see the need for 2 intermediate cross members in the left and right bays..Here's close to what I originally came up with. If I moved the lift plate and the associated supports about 4 inches to the left, I could add a 5th cross support towards the right side.
The router and lift weighs about 20 lbs and I think those two 3/4" heavy wall square aluminum sections will easily support that weight on a 24 inch span because the 1/4" aluminum lift plate takes up a good portion of the span.
Drawing is not to scale, but sorta kinda close enough for this visual.:wink:
the material is over 40 years old...Good images for being that old, Stick. My router will not be used very often. I won't ever do volumes of woodwork like many of you guys do.
do it once...Good images for being that old, Stick. My router will not be used very often. I won't ever do volumes of woodwork like many of you guys do.