How to Make a Splined Miter Joint
The woodworking video shows how to make a splined miter joint on the table saw using a splined miter jig that is made in the woodworking shop. The jig for the table saw is easy to make and yet very accurate when cutting miter joints that include a spline. Notice how the plywood miter jig is slid along the surface of the table while sliding also against the table saw fence. Also, an 8 inch dado blade is used to cut the slot for the spline while a clamp secures the picture frame to the miter jig.
The Splined Miter Joint is a decorative yet very strong joint. The addition of the spline and glue makes a regular miter joint all the more stronger while aiding in keeping the miter joint nice and tight. By using a wood spline that is of a contrasting wood, the woodworker can achieve a very distinctive appearance at the miter corners. This is why it is a favorite woodworking joint used when making a picture frame. (This joinery was cut on the table saw with the aid of a sliding woodworking jig. The splined miter joint can also be cut on the router table as well.)
Note: The grain of the wood spline needs to be in the slot at a right angle to the miter joint when glued in order to give the splined miter joint its full strength.