Which size Domino tenon should I use for which thickness of material?
Generally, the Domino thickness should be one-third the thickness of the work piece. When joining 3/4″ hardwoods however, you can use the 8mm Domino tenon. On soft woods, and plywood, abide by the one-third rule. The strength of a mortise and tenon joint lies in the length and width of the tenon. The glue bond on the face of the tenon contributes most to joint strength. Therefore, you want to use either the largest Domino tenon your stock will accommodate, or a combination of smaller Domino tenons to maximize joint strength. There are limitations, however. The extra wood removed from a member necessary to accommodate a larger tenon may cause the wood to split when the joint is stressed, especially when soft woods are used. On joints with stacked Domino tenons, the minimum amount of material necessary above, between and below the Domino tenons should be equal to the thickness of the Domino tenon. On Domino tenons placed next to each other, the minimum spacing between Domino tenons shoul
