Your goal is to have a and b equal to each other.
Lock miter router setup.
Align the midpoint of the lock miter cut with the centerline of the workpiece.
You need to get both the fence position and the bit height exactly right in order for this joint to work.
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.
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.
A lock miter bit is one of the most challenging router bits to set up.
With the lock miter master jig you can set up a lock miter bit in no time at all.
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.
Router bit item 55 502.
A lock miter router bit cuts a 45 degree miter with a tongue and groove.
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.
That is the fence would never be set that far back.
Check out our guide to learn the r.
There are two sizes of the lock miter master jig.
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.
Set the initial router bit height by using a piece of your stock as a reference.
Set the approximate fence depth by visually.
Simple steps for airtight joints.