Patent attributes
A woodworking jig is used to set cutter height and horizontal fence position when forming lock miter joints with a forty-five degree (45°) lock miter cutter on a router table or shaper. Vertical and horizontal reference lines are formed on the exterior surface of the jig. Setup is accomplished by adjusting the cutter height and fence position until the appropriate reference lines on the jig align with centerlines or centerline-derived lines on the edge of the stock. Using the appropriate reference lines, the jig is used to complete setups for standard lock miter joints with boards of equal thickness, non-standard lock miters joints with boards of different thicknesses, and offset lock miter joints. The jig has no moving parts, requires no calibration or measuring devices, and works with any lock miter router bit and most shaper cutters. The jig locates the geometric center of the router bit profile with precision.
