Workpiece Inspection; Choosing Cutter - Grizzly G0894 Owner's Manual

Workpiece
Inspection
Some workpieces are not safe to cut or may
require modification before they are safe to cut.
Before cutting, inspect all workpieces for the
following:
• Material Type: This machine is intended for
cutting natural and man-made wood prod-
ucts, laminate covered wood products, and
some plastics. Cutting drywall or cementi-
tious backer board creates extremely fine
dust and may reduce the life of the bearings.
This machine is NOT designed to cut metal,
glass, stone, tile, etc.; cutting these materials
with this machine may lead to injury.
• Foreign Objects: Nails, staples, dirt, rocks
and other foreign objects are often embed-
ded in wood. While cutting, these objects can
become dislodged and hit the operator, or
break the cutter, which might then fly apart.
Always visually inspect your workpiece for
these items. If they can't be removed, DO
NOT cut the workpiece.
• Large/Loose Knots: Loose knots can
become dislodged during the cutting opera-
tion. Large knots can cause machine dam-
age. Choose workpieces that do not have
large/loose knots or plan ahead to avoid cut-
ting through them.
• Wet or "Green" Stock: Cutting wood with
a moisture content over 20% causes unnec-
essary wear on the cutter and yields poor
results.
Excessive Warping:
•
excessive cupping, bowing, or twisting are
dangerous to cut because they are unstable
and often unpredictable when being cut. DO
NOT use workpieces with these characteristics!
Minor Warping: Workpieces with slight cup-
•
ping can be safely supported if cupped side
is facing table. On the contrary, a workpiece
supported on the bowed side will rock during
a cut and could cause severe injury.
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Workpieces with

Choosing Cutter

There are many cutters available. Be sure to
choose the right one for your application and
material. Read all manufacturer instructions
before installing and using a cutter.
When choosing a cutter, consider:
1. Material Type: Most cutters are designed for
specific material. Choose a unique bit for ply-
wood, engineered wood products, hardwood,
and composite to improve overall results. If
a general-purpose bit is needed, a two-flute,
upcut, spiral bit is a good choice.
2. Application: Many design features are best
cut using specific tools. For example:
— Use a V-bit for cutting signs and lettering.
— Use a spoilboard cutter or fly cutter for sur-
facing a spoilboard or finishing a smooth,
flat workpiece, such as a counter top.
— Use a form bit to cut a profile with a uni-
form contour, such as an ogee or round
over.
— Use a chipbreaker or rougher for rough
cuts and quickly removing a large amount
of material when the finish does not matter.
3. Feed and Speed Rates: Feed rate, spindle
speed, and number of flutes on the cutter
determine chip load. The chip load affects
the best diameter bit to use to get the high-
est quality finish while minimizing wear. Most
manufacturers will list the recommended chip
load for their cutters.
Model G0894 (Mfd. Since 05/19)