Woods Flashcards
Addition
refers to joining methods
Forming and wasting processes
modify the shape by bending
or wearing away material
What are the Joining methods
• Comb joint
• Dovetail joint
• Housing joint
• Half-lap joint
• Dowel joint
• Mortise and tenon
Comb joint
Used for boxes and carcasses
interlocking fingers which fit tightly
together and are reinforced by glue
Best created using a router jig on
natural or manufactured timbers or
using a laser cutter on some materials
Dovetail joint
Used for cabinets and drawers
high level of skill
but can be cut fairly easily with a router and jig strength
relies on interlocking fingers and
accurate marking and cutting
• The dovetail shapes means
that these joints have superior
directional strength
Housing joint
Used in shelves and dividers cut through one
piece of timber which houses
a second perpendicular piece
• It is fairly strong, when supported
with glue but can be used without
glue to create sliding parts
Half lap joint
two overlapping materials glued together
• Used in picture frames, doors and cabinet making
• Quick and easy to make but
not particularly strong
• The shoulder helps resist
diagonal distortion
Dowel joint
quick, simple and effective
method to join a variety of materials
• Used in both frame and carcass construction, flat-pack
furniture and to reinforce edge to edge joints
• Holes are machined easily with a drill and jigs can
be used to speed up the process further
• Suitable for use in natural timbers
Mortise and tenon
heavy duty joint used in load
bearing timber frameworks
• With high shear strength, it’s used
in traditional building construction
and frames for tables and chairs
• The tenon may be glued or pinned in place.
Finger/comb
Interlocking fingers increase surface
area for gluing
• Tight fit between fingers increases
strength
• Fingers create a repeated pattern
that is considered aesthetically pleasing
Woods screws
different lengths and widths,
with a variety of head shapes and finishes
• Most screws are made from mild steel and are then plated
in brass, zinc, chrome or another non-corrosive metal
• Screw heads are often countersunk so the screw hole can be
filled or plugged, others have a domed head which can make
a feature of the joint
• Screws are quick to install and can join dissimilar materials
Heads and threads
most common type of screw is the Pozi-drive
• Philips and slot head screws also are commonly available
• It’s essential to choose a driver bit of the correct size and
shape to avoid damaging the screw, driver bit or workpiece
• Self-tapping screws don’t always need a pre-drilled pilot hole
and twin drive threads drive into timber in half the time
Clearance and pilot holes
• Pre-drilled clearance and pilot holes reduce the risk
of wood splitting when a screw is inserted
• Pilot holes allow the core of the screw
to pass into the material while the
thread bites into the sides
• Clearance holes allow components
to drop in and out without friction
• Clearance holes are required
when using nuts and bolts
Pilot hole
Clea
Nuts and bolts
Temporary or permanent fixing
Sued with washers to create moving or folding parts
Coach bolts
Used in structures such as summer houses,benches,sheds
