On Apr 9, 6:11 pm, Mark wrote:
On Apr 9, 4:03 pm, dpb wrote:

Mark wrote:
Does anyone know if there are pattern bits available with a 1/2" shank
that have shorter cutting lengths? All of the "standard" bit
manufacturers seem to start their cutting lengths at 1" for the 1/2"
shanks. Unfortunately, this won't do for my project as my template is
1/2" and I need to route out less than 1/2" from the work piece. ...

Surely there are, but ottomh I don't have a specific vendor.

Why not just add a spacer between the template and the workpiece?

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A spacer is a decent plan B, but I would like to avoid it if I can.
The reason is that I will be template routing two sides of the
workpiece in order to create a fancy tenon for a slip mortise. For
this to work, the template must be in exactly the same place on both
sides of the workpiece, which is much easier to line up without a
spacer.

Hmm, are the edges of the tenon undercut?

Then I understand your difficulty and using the template to make
a thicker template, or a custom shim seems to be the way to go.

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FF