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bberchin

Round expansion table mechanism

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I need to design a simple expansion table mechanism with 2 leaves for a round top. I'm looking for ideas on how to do it so it is easy to use and functions well. Anything out there I can duplicate by way of drawings or pics? Book? Magazine article? Thx.

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I have used commercially available wooden slides before and was disappointed with the loose saggy action. I would look at the metal slides. Most manufacturers should have some guidelines for how big and how many leaves can be used.

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I'm afraid I don't think this will answer your question but it is a flipping cool way to expand a round table...

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Yes, I've seen that before. It's very impressive, but I don't come across too many clients who would be able to afford it if I tried to duplicate it! I did, however find a mechanism that I'm going to buy for my current project and perhaps develop my own based on it for any further expansion table projects. We haven't gotten much call for them.

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    • Hi Anna! Glad to have you join. That's some really nice work, and an excellent journal. Keep the updates coming, we LOVE to see pictures!
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      http://postimg.org/image/cpt2ifz19
      http://postimg.org/image/urc7g8t25
      Can someone help me? Should I change the type of veneer or glue? Do you have any idea?
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    • Welcome to the forums Anna!  Pretty cool looking project!  Nice work as well!
    • I’m new to this forum, but have enjoyed looking at some of the other projects people are posting.  Thought I’d share a work in progress…   I’m working on an adjustable height table that will convert from a coffee table height to a desk/worktable height using a pulley system.  There’s a little model of the table below, along with some of the full size legs before shaping.    The model has rubber bands running between the dowels connecting the tops of the legs, but right now the plan is for that to be a pulley system on the full size version.   I’ve got part of the shaping on the legs done.     Still working on the mechanism that is going to hold these together in place of the dowels in the model.  Right not, I’m thinking a metal pipe with a threaded rod on the inside so I can add some wooden nuts to the outside to hold it tight.  I made a few prototypes of the “nuts” with a T-nut embedded in them to provide metal threads.  I don’t have pictures of that yet though.    The table top is a live edge tope inspired by the Scott Lewis cutting board from fine woodworking.  If you haven’t seen the video, it’s amazing…   https://www.youtube.com/watch?v=lR9_CjQYZj4   I cut the slab below in half, but wanted to disguise the joint between the two pieces, especially because it’s such a figured board.     I made a curved template with a ½ inch gap using the router, and then used each side of the template to cut the curves on the top and bottom of the slabs.  This is the 2 pieces next to each other with the ½ inch gap in between.   Then I filled the gap with a ½ inch ribbon using maple, wenge, and cherry strips and clamped it up. I trimmed the excess with a Japanese saw and a block plane.       I’m planning to add another 2-3 ribbons, and tentatively planned them out with tape. I’ve cut the first one using another MDF template and a ¼ inch router bit with a guide bushing, cut about ¾ inch deep groove.  So far, I’ve got that once glued up and will add the rest of the ribbons in sequence.  You can see some of my templates at the top of the picture below.   Still a work in progress, but it’s been a fun project so far.  
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