When correctly cut the parts go together at a perfect 90 degree angle and the interlocking tongues and grooves make for lots of mechanical strength and glue surface area.
Lock miter router setup.
Set the approximate fence depth by visually.
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.
Router bit item 55 502.
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.
First a diagram the numbers shown are for the infinity lock miter jr.
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 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.
45 lock miter router bit instructions set bit height and fence depth 1.
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.
A lock miter router bit cuts a 45 degree miter with a tongue and groove.
There are two sizes of the lock miter master jig.
On the thread mentioned above there were many good suggestions for setting up the lock miter.
Simple steps for airtight joints.
Align the midpoint of the lock miter cut with the centerline of the workpiece.
A lock miter bit is one of the most challenging router bits to set up.
Your goal is to have a and b equal to each other.
That is the fence would never be set that far back.