Lock Miter Router Setup

A lock miter bit is one of the most challenging router bits to set up.

Lock miter router setup.

That is the fence would never be set that far back. On the thread mentioned above there were many good suggestions for setting up the lock miter. Align the midpoint of the lock miter cut with the centerline of the workpiece. Note that the markings are for reference only and particularly in the case of the fence location don t precisely represent the actual set up.

Router bit item 55 502. A lock miter router bit cuts a 45 degree miter with a tongue and groove. With the lock miter master jig you can set up a lock miter bit in no time at all. You need to get both the fence position and the bit height exactly right in order for this joint to work.

In woodworking circles the lock miter is often referred to as a trick bit by a feat of geometric genius the bit creates both halves of a mitered corner complete with interlocking tongues and grooves with a single router table setup. Simple steps for airtight joints. Set the initial router bit height by using a piece of your stock as a reference. In an effort to not completely derail that thread i thought it would make sense to have a dedicated thread to discuss tips and tricks to setting up a lock miter joint on the router table.

First a diagram the numbers shown are for the infinity lock miter jr. One is for smaller router bits cutting 3 8 to 3 4 thick stock the other is for the larger bits cutting 5 8 to 1 1 8 thick stock. Your goal is to have a and b equal to each other. Set the approximate fence depth by visually.

Once it does it delivers a very strong and elegant miter joint that is virtually impossible to detect from the outside and offers the additional advantage of being self. 45 lock miter router bit instructions set bit height and fence depth 1.