14
CUTTING MORTISES
You can use either a forstner or spade (flat) bit to
drill mortises. I personally like using forstner bits
because there is less tear-out and a flat bottom.
If you are planning on countersinking the
mortises later using the E-Z Log Sink, you will
need either a 1.5” or 2” bit.
Be sure that your bits are sharp. Using a sharp bit makes the
job a lot easier. Bit sharpening kits are available at most
woodworking stores and will save money over the long run
instead of buying a new bit when it gets dull.
available at the end of this manual.
It is important to hold your drill steady when drilling a mortise. If
your drill wobbles during the cut, it may enlarge the mortise and
make a lose joint.
If you have not already done so, cut a
test mortise and tenon out of a scrap
log to check the fit before drilling lots
of mortises and tenons.
After your tenons are cut, lay out your
project and mark where you need to
drill the mortises.
Pay attention to the shape of the log and the tenon. If the rail is
curved, or if your tenon was cut at an angle, you may need to
drill the mortise at an angle as well. If so, put a pencil mark on
the front of the log to help you
remember what angle to hold
your drill when drilling the
mortise. You will also need
to place either a center mark
or outline the tenon onto the
log so you know where to
place your mortise bit.
