# oak pedestal for table

 Forum topic by ewinger posted 07-31-2013 08:30 PM 1093 views 0 times favorited 4 replies
 ewinger21 posts in 1750 days 07-31-2013 08:30 PM I will be the first to admit I am not good at geometryMy wife wants to convert a coffee table back to a dinning room table and I need to built a 8-sided pedestal to do this and I cannot come up with the angular to cut the piece to make the octagon ship come someone help Bill EwingerBurlington Iowa -- Bill ewinger

## 4 replies so far

 Mark Kornell1166 posts in 2223 days #1 posted 07-31-2013 09:01 PM An octagon has 8 sides, so 360 degrees divided by 8 = 45. Since each side of the joint uses half the angle, 45 / 2 = 22.5. So, tilt your saw blade at 22.5 degrees from vertical. -- Mark Kornell, Kornell Wood Design DS2261 posts in 2113 days #2 posted 07-31-2013 10:07 PM Check! Mark’s got it! 22.5 degrees. A router bit can also do the trick. They make one with 22.5 degree angle just for this purpose. -- "Hard work is not defined by the difficulty of the task as much as a person's desire to perform it.", DS251 RogerInColorado321 posts in 1647 days #3 posted 08-02-2013 05:41 AM I’ve done exactly what you are getting ready to do. The cut down table was my Mom’s, one of my sons wanted it as a dining table. The math above is right. I’d recommend building a prototype out of MDF or plywood to make absolutely certain your angle set up is dead on and that you have a good glue up strategy. I used the packing tape method and got perfect results, but it takes a little practice with 8 sides to get the pedestal dead square. rrww263 posts in 1806 days #4 posted 08-02-2013 02:14 PM We do around 1000 octagons a year, its real easy. Make sure wood is flat / square before you start. One bad piece will throw off the whole pedestal. Get a tiltbox or wixey and your miters will be perfect. Band clamps are the way to go for clamping! Good Luck