Adjustable Tongue-and-Groove Set

Adjustable Tongue-and-Groove Set

Lots of tongue-and-groove router bit sets are designed
for 3/4-in. material. They cut 1/4-in. tongues and
1/4-in. grooves. A new bit set from Freud ($70) is
adjustable. So why is this a big deal? Adjustability
means you can use this set for stock from 1/2-in. to
1-1/4-in. thick.

You can make grooves (and matching tongues) from
7/32-in. to 3/8-in.wide in .004-in. increments, by slipping
shims between the cutters.Each bit has its own set
of shims.According to Freud, the tongues and grooves
will match as long as you shim each bit by the same
amount.

Tongue-and-groove joints can be used for mounting
breadboard ends on tables or to make cabinet doors.
When making doors, the adjustable slot cutter is great
because you can adjust it to make grooves that fit 1/4-in.
plywood,which is almost always less than 1/4-in. thick.