User Manual
20
Place the Undercover Jig on
the board so that it butts onto
the edge of the board with the
stop. Fasten the board and the
Undercover Jig to the work-
bench with a clamp and drill a
diagonal pocket hole or blind
hole as far as the depth stop
with the stepped drill. During
this, keep moving the drill slight-
ly
backwards and forwards so
that the sawdust can be ejec-
ted better.
Making a corner joint
Then fix the wood pieces that
are to be joined precisely with
a clamp. The more precisely
the wood pieces are clamped
together, the better the whole
corner joint will be in the end.
Following this, insert the exten-
ded bit attachment into the por-
table electric drill and screw
the screw appropriate to the
thickness of the wood into the
pocket holes (see table page
19).
Of course it is also possible to
screw the board with the drill
holes outwards. Thus you al-
ways have the option to choose
the working method that is most
convenient for you depending
on the work situation. For a con-
cealed screw joint, in any event,
drill only boards that butt with
their face onto another board.
T joint
For a T joint, the holes are
made in exactly the same way
as for a corner joint. Then the
drilled board is simply clamped
against the counter-board in
the required position, and both
wood parts are firmly jointed
with the appropriate screws. If
it is not going to be necessary
to undo the joint, it can additio-
nally be glued, for greater sta-
bility.
A concealed screw joint is also
a rapid and very durable alter-
native for face joints. For pic-
ture frames and radiator panel-
ling, for example, drill holes
visible from the rear are in no
way disturbing. But even these
joints can be sealed almost
invisibly with colour matched
wax putty or the angled dowels
supplied.
What is important is, regard-
less of what joint is being
made, that the workpieces are
fixed firmly and precisely in
place with clamps, so that they
cannot slip when being scre-
wed tight. The more carefully
and precisely you do this, the
better will be the joint as a
whole.
Making a face joint
Undercover jig
Corner, t and face joints
Duebelf_0514.indd 20 17.06.14 15:28