Operation – Ryobi JM82 User Manual
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OPERATION
WARNING:
Do not allow familiarity with tools to make you careless.
Remember that a careless fraction of a second is suf-
ficient to inflict serious injury.
WARNING:
Always wear safety goggles or safety glasses with side
shields when operating power tools. Failure to do so
could result in objects being thrown into your eyes re-
sulting in possible serious injury.
APPLICATIONS
You may use this tool for the purposes listed below:
n
Cutting precise mating oval slots in hard wood, soft wood,
plywood and particle board
SPLINE JOINERY
Spline joinery is one of the strongest methods of joinery used
in woodworking. When glue is properly applied to a spline
and to the joint area of the wood pieces being connected,
a large surface area receives the adhesion properties of the
glue. This forms a strong joint.
Traditional spline joinery requires cutting slots with a router
or table saw. Small, thin strips of wood must then be cut to
fit inside the slots and act as splines.
Newer methods of spline joinery use a plate or biscuit joiner
to cut precise mating oval slots in adjoining boards. This
biscuit joiner is a fast, simple, and accurate plunge-cutting
tool that can be used to cut slots in hardwood, softwood,
plywood, particle board, and other pressed woods.
Football shaped wafers, called biscuits, are then placed
inside the slots with glue and used to help line up adjoining
surfaces. When a water based glue is used, the biscuits swell
in the joint, making an extremely strong and firm bond. White
glue, yellow glue, carpenters glue, hide glue and aliphatic
resin glue are examples of water-based glues.This bonding
technique has traditionally been limited to making edge-to-
edge joints. However, with the use of your new biscuit joiner,
biscuits can now be easily used to connect butt, miter, and
T-joints. Biscuit joining can be as strong as mortise and tenon,
tongue and groove, standard spline, and doweled joints. In
most cases the material around the biscuit will break before
the biscuit itself will break. A greater surface area is exposed
to glue in a biscuit joint, making the seams stronger.
A variety of spline joints can be made using the biscuit joiner.
The number and size biscuits needed for each joint depends
on the thickness of the wood and the length of the joint. In
general, the small #0 biscuits should be used for miter cuts
in 3/4 in. materials. The larger biscuits should be used for
edge-to-edge joinery.
When joining 1-1/2 in. thick materials, stack two biscuits, one
above the other. For example, use this method when joining 2
in. x 4 in. dressed lumber. When joining even thicker materi-
als, use additional biscuits, stacked above each other.
When making edge-to-edge joints for tabletops, work-
benches, cutting boards, etc. the more biscuits you use,
the stronger the joint will be.
TURNING ON/OFF THE BISCUIT JOINER
See Figure 4.
To turn on the biscuit joiner, depress the switch trigger. Re-
lease the switch trigger to turn the biscuit joiner off.
When operating the biscuit joiner, hold the tool with both
hands. Keep one hand on the rear handle and place your
other hand on the fence to hold the tool steady against the
workpiece.
This tool has a dual grip rear handle that allows the operator
to choose from two different hand positions and use the one
that is more comfortable.
Fig. 4