Question about using a router sled for big slabs

Last month I had to flatten a huge walnut slab for a table top, and my usual planer was way too small. I remembered seeing a router sled setup online, so I built one with some scrap plywood and aluminum rails. It took me about two hours to put together, but it saved the whole job. The key was making sure the rails were dead flat across the whole span, about 8 feet. I used a 2 inch flattening bit and went slow, and the surface came out glass smooth. It was a bit dusty, but the result was worth it. Has anyone else tried this method on slabs over 6 feet long? What bit speed did you find worked best?

3 comments

3 Comments

mason_reed4720d ago

What router bit did you use?

oliviatorres20d ago

Oh man, I used a 1/4 inch round over bit for that edge. It gave me a smooth finish without taking off too much material. Worked perfectly for my table project.

sammartinez20d ago

A 1/4 inch round over bit on a big slab edge? That's wild. I would have been scared to death of tear-out on walnut. I only use those tiny bits for picture frames and small trim. For an 8 foot slab I went straight for a 3/4 inch bearing-guided bit. Can't believe it worked for you.