Grizzly G2790 User manual
MODEL G2790
UNIVERSAL KNIFE GRINDER
OWNER'S MANUAL
WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE
OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.
177335
This manual provides critical safety instructions on the proper setup,
operation, maintenance, and service of this machine/tool. Save this
document, refer to it often, and use it to instruct other operators.
Failure to read, understand and follow the instructions in this manual
may result in fire or serious personal injury—including amputation,
electrocution, or death.
The owner of this machine/tool is solely responsible for its safe use.
This responsibility includes but is not limited to proper installation in
a safe environment, personnel training and usage authorization,
proper inspection and maintenance, manual availability and compre-
hension, application of safety devices, cutting/sanding/grinding tool
integrity, and the usage of personal protective equipment.
The manufacturer will not be held liable for injury or property damage
from negligence, improper training, machine modifications or misuse.
Some dust created by power sanding, sawing, grinding, drilling, and
other construction activities contains chemicals known to the State
of California to cause cancer, birth defects or other reproductive
harm. Some examples of these chemicals are:
• Lead from lead-based paints.
• Crystalline silica from bricks, cement and other masonry products.
• Arsenic and chromium from chemically-treated lumber.
Your risk from these exposures varies, depending on how often you
do this type of work. To reduce your exposure to these chemicals:
Work in a well ventilated area, and work with approved safety equip-
ment, such as those dust masks that are specially designed to filter
out microscopic particles.
INTRODUCTION............................................................................................................................... 2
SECTION 1: SAFETY....................................................................................................................... 6
SECTION 2: POWER SUPPLY ........................................................................................................ 9
SECTION 3: SETUP ....................................................................................................................... 11
SECTION 4: OPERATIONS ........................................................................................................... 15
SECTION 5: ACCESSORIES......................................................................................................... 22
SECTION 6: MAINTENANCE......................................................................................................... 23
SECTION 7: SERVICE ................................................................................................................... 25
SECTION 8: WIRING...................................................................................................................... 27
SECTION 9: PARTS....................................................................................................................... 29
WARRANTY AND RETURNS ........................................................................................................ 34
Table of Contents
INTRODUCTION
Contact Info
Functional OverviewManual Accuracy
your machine may not exactly match
the manual
www.grizzly.com
Figures 1–2
Figure 1.
Figure 2.
Identification
Figure 3.
Page 1 of 2Model G2790
model G2790
Universal Knife Grinder
Product Dimensions:
Weight ............................................................................................................................................................................. 45 lbs.
Length/Width/Height .......................................................................................................................................24" x 11
1⁄2" x 13"
Foot Print (Length/Width) .............................................................................................................................................. 9" Circle
Shipping Dimensions:
Type ...........................................................................................................................................................................Cardboard
Content .......................................................................................................................................................................... Machine
Weight ..............................................................................................................................................................................59 lbs.
Box 1 Length/Width/Height .................................................................................................................................20" x 13" x 13"
Box 2 Length/Width/Height .....................................................................................................................................26" x 5" x 3"
Electrical:
Switch ................................................................................................................................................................ ON/OFF Toggle
Switch Voltage ................................................................................................................................................................... 110V
Cord Length ..........................................................................................................................................................................4 ft.
Cord Gauge .................................................................................................................................................................18 gauge
Minimum Circuit Requirement .............................................................................................................................................. 15A
Included Plug ........................................................................................................................................................... NEMA 5-15
Motor:
Type ......................................................................................................................................... TEFC Capacitor Start Induction
Horsepower ........................................................................................................................................................................1⁄2 HP
Voltage ............................................................................................................................................................................... 110V
Phase ................................................................................................................................................................................Single
Amps ...................................................................................................................................................................................... 3A
Speed .........................................................................................................................................................................3500 RPM
Cycle ................................................................................................................................................................................. 60 Hz
Power Transfer ........................................................................................................................................................Direct Drive
Bearings ............................................................................................................................... Shielded and Permanently Sealed
Machine Data Sheet
Model G2790Page 2 of 2
Capacities
Maximum Blade Length ........................................................................................................................................................ 20"
Table Tilt ......................................................................................................................................................................20° – 70°
Grinding Wheel Specifications:
Type .................................................................................................................................................................................Type 5
Diameter .................................................................................................................................................................................. 6"
Thickness ............................................................................................................................................................................. 1
1⁄2"
Bore .........................................................................................................................................................................................1⁄2"
Construction:
Base .............................................................................................................................................................................Cast Iron
Table ............................................................................................................................................................................Cast Iron
Other Specifications:
Country of Origin ............................................................................................................................................................. Taiwan
Warranty ........................................................................................................................................................................... 1 Year
Serial Number Location ................................................................................................................... ID Label on Front of Motor
Assembly Time ...............................................................................................................................................................1⁄2 Hour
Features:
Knife Holder Adjusts From 20° – 70°
120 Grit Aluminum Oxide Grinding Stone Raises and Lowers
ELECTRICAL EQUIPMENT INJURY RISKS.
DISCONNECT POWER FIRST.
EYE PROTECTION.
OWNER’S MANUAL.
TRAINED OPERATORS ONLY.
DANGEROUS ENVIRONMENTS.
MENTAL ALERTNESS REQUIRED.
For Your Own Safety, Read Instruction
Manual Before Operating This Machine
The purpose of safety symbols is to attract your attention to possible hazardous conditions.
This manual uses a series of symbols and signal words intended to convey the level of impor-
tance of the safety messages. The progression of symbols is described below. Remember that
safety messages by themselves do not eliminate danger and are not a substitute for proper
accident prevention measures. Always use common sense and good judgment.
Indicates a potentially hazardous situation which, if not avoided,
MAY result in minor or moderate injury. It may also be used to alert
against unsafe practices.
Indicates a potentially hazardous situation which, if not avoided,
COULD result in death or serious injury.
Indicates an imminently hazardous situation which, if not avoided,
WILL result in death or serious injury.
This symbol is used to alert the user to useful information about
proper operation of the machine.
NOTICE
Safety Instructions for Machinery
SECTION 1: SAFETY
WEARING PROPER APPAREL.
HAZARDOUS DUST.
HEARING PROTECTION.
REMOVE ADJUSTING TOOLS.
INTENDED USAGE.
AWKWARD POSITIONS.
CHILDREN & BYSTANDERS.
GUARDS & COVERS.
FORCING MACHINERY.
NEVER STAND ON MACHINE.
STABLE MACHINE.
USE RECOMMENDED ACCESSORIES.
UNATTENDED OPERATION.
OFF
MAINTAIN WITH CARE.
CHECK DAMAGED PARTS.
MAINTAIN POWER CORDS.
EXPERIENCING DIFFICULTIES.
Additional Safety Instructions for Grinders
STARTING GRINDER.
LUNG PROTECTION.
HAND/WHEEL CONTACT.
GUARDS & SUPPORTS.
ON.
EXPERIENCING DIFFICULTIES.
No list of safety guidelines can be complete.
Every shop environment is different. Always
consider safety first, as it applies to your
individual working conditions. Use this and
other machinery with caution and respect.
Failure to do so could result in serious per-
sonal injury, damage to equipment, or poor
work results.
Like all machinery there is potential danger
when operating this machine. Accidents are
frequently caused by lack of familiarity or
failure to pay attention. Use this machine
with respect and caution to decrease the
risk of operator injury. If normal safety pre-
cautions are overlooked or ignored, serious
personal injury may occur.
EYE PROTECTION.
MOUNTING TO WORKBENCH.
WHEEL SPEED RATING.
WHEEL FLANGES.
WHEEL INSPECTION.
DRY GRINDING.
SECTION 2: POWER SUPPLY
Availability
Electrocution, fire, or
equipment damage may
occur if machine is not
correctly grounded and
connected to the power
supply.
Full-Load Current Rating
Full-Load Current Rating at 110V.................3A
For your own safety and protection of
property, consult an electrician if you are
unsure about wiring practices or electrical
codes in your area.
Note: The circuit requirements listed in this man-
ual apply to a dedicated circuit—where only one
machine will be running at a time. If this machine
will be connected to a shared circuit where mul-
tiple machines will be running at the same time,
consult a qualified electrician to ensure that the
circuit is properly sized for safe operation.
110V Circuit Requirements
Nominal Voltage ........................................ 110V
Cycle ..........................................................60 Hz
Phase........................................... Single-Phase
Power Supply Circuit ..................................15A
Serious injury could occur if you connect
the machine to power before completing the
setup process. DO NOT connect to power
until instructed later in this manual.
Improper connection of the equipment-grounding
wire can result in a risk of electric shock. The
wire with green insulation (with or without yellow
stripes) is the equipment-grounding wire. If repair
or replacement of the power cord or plug is nec-
essary, do not connect the equipment-grounding
wire to a live (current carrying) terminal.
Check with a qualified electrician or service per-
sonnel if you do not understand these grounding
requirements, or if you are in doubt about whether
the tool is properly grounded. If you ever notice
that a cord or plug is damaged or worn, discon-
nect it from power, and immediately replace it with
a new one.
Extension Cords
We do not recommend using an extension cord
with this machine. If you must use an extension
cord, only use it if absolutely necessary and only
on a temporary basis.
Extension cords cause voltage drop, which may
damage electrical components and shorten motor
life. Voltage drop increases as the extension cord
size gets longer and the gauge size gets smaller
(higher gauge numbers indicate smaller sizes).
Any extension cord used with this machine must
contain a ground wire, match the required plug
and receptacle, and meet the following require-
ments:
Minimum Gauge Size ...........................16 AWG
Maximum Length (Shorter is Better).......50 ft.
Grounding & Plug Requirements
Figure 4.
Grounding Prong
Neutral Hot
5-15 PLUG
GROUNDED
5-15 RECEPTACLE
SHOCK HAZARD!
Two-prong outlets do not meet the grounding
requirements for this machine. Do not modify
or use an adapter on the plug provided—if
it will not fit the outlet, have a qualified
electrician install the proper outlet with a
verified ground.
This machine MUST be grounded. In the event
of certain malfunctions or breakdowns, grounding
reduces the risk of electric shock by providing a
path of least resistance for electric current.
This machine is equipped with a power cord that
has an equipment-grounding wire and a ground-
ing plug (similar to the figure below). The plug
must only be inserted into a matching receptacle
(outlet) that is properly installed and grounded in
accordance with all local codes and ordinances.
Wear safety glasses dur-
ing the entire setup pro-
cess!
This machine presents
serious injury hazards
to untrained users. Read
through this entire manu-
al to become familiar with
the controls and opera-
tions before starting the
machine!
SECTION 3: SETUP
Description Qty
Page 11
Page 13
Items Needed for
Setup
please imme-
diately call Customer Service at (570) 546-9663
for advice.
Otherwise, filing a freight claim can be difficult.
Unpacking
Inventory
Note: If you can't find an item on this list, check
the mounting location on the machine or examine
the packaging materials carefully. Occasionally
we pre-install certain components for shipping
purposes.
Inventory: (Figure 5) Qty
A.
B.
C.
D.
E.
SUFFOCATION HAZARD!
Immediately discard all plas-
tic bags and packing materi-
als to eliminate choking/suf-
focation hazards for children
and animals.
Figure 5.
Figure 6
For optimum performance, clean all moving
parts or sliding contact surfaces.
Clean Up
Gasoline and petroleum
products have low flash
points and can explode
or cause fire if used to
clean machinery. DO
NOT use these products
to clean the machinery.
Many cleaning solvents
are toxic if inhaled.
Minimize your risk by only
using these products in a
well ventilated area.
G2544—Solvent Cleaner & Degreaser
T23692—Orange Power Degreaser Plus
Figure 6.
Workbench Load
Machine Data Sheet
Placement Location
Figure 7
Children and visitors may be
seriously injured if unsuper-
vised around this machine.
Lock entrances to the shop
or disable start switch or
power connection to prevent
unsupervised use.
Site Considerations Mounting
Note: The rubber feet provide vibration absorp-
tion for the grinder. We recommend that you keep
them on the machine when you mount it to the
workbench.
Machine Base
Workbench
Bolt
Flat Washer
Flat Washer
Lock Washer
Hex Nut
Figure 8.
Figure 7.
44"
10"
12"
Machine Base
Workbench
Lag Screw
Flat Washer
Figure 9.
Test Run To test run the machine:
1.
2.
3.
ON
4.
5. OFF
TroubleshootingPage 25
Damage to your eyes, lungs, and ears could
result from using this machine without
proper protective gear. Always wear safety
glasses, a respirator, and hearing protection
when operating this machine.
SECTION 4: OPERATIONS
NOTICE
If you have never used this type of machine
or equipment before, WE STRONGLY REC-
OMMEND that you read books, trade maga-
zines, or get formal training before begin-
ning any projects. Regardless of the con-
tent in this section, Grizzly Industrial will
not be held liable for accidents caused by
lack of training.
To reduce the risk of
serious injury when using
this machine, read and
understand this entire
manual before beginning
any operations.
Loose hair, clothing, or
jewelry could get caught
in machinery and cause
serious personal injury.
Keep these items away
from moving parts at all
times to reduce this risk.
Grinding Tips
Follow these rules when grinding:
Wheel CarePage 15
Wheel Selection
Accessories Page 21
The typical format for wheel numbering is:
• Type:
Abrasive Type:
A
C
SG
Grit Size:
Grade:
AZ
Bond Type:
V
B
Note: There may be other numbers or letters
that have meaning for a particular type of wheel.
Always refer to the manufacturer's technical data
for a complete explanation when choosing a
grinding wheel.
Wheel Care
Follow these rules to reduce the risk of break-
ing the wheel:
Wheel
ReplacementPage 24
Wheel Dressing
Page 23
Wheel Inspection & Ring Test Page
16
Wheel Inspection &
Ring Test
To perform a ring test:
1.
2.
3.
Figure 10
STOP
Rated 3500 RPM
Make sure your grinder is not
faster than the rated RPM of this wheel
WARNING
Grinding can be dangerous
Visually inspect this wheel
for cracks, nicks,chips
Type-1
Aluminum
Oxide
60 Grit
Grade L
Vitrified Bond
Figure 10.
4.
Mounting Pivot
Support
To mount the pivot support on the grinder
table:
1.
2.
Figure 11
3.
Figure 11.
Sharpening Narrow
Tools
Figure 12
To sharpen a narrow tool bevel:
1.
2.
3.
Figure 12
4.
5.
Figure 12
6.
ON
7.
Note: Keep in mind that with a dry grinding
operation, tools can heat up quickly and lose
their temper. Sharpening should be done in
light passes and for short durations to avoid
damaging the tool or wheel.
Tip: Apply marker ink to the full beveled sur-
face of the tool to help verify when the tool
is properly ground. Also, a fine straightedge
held to the bevel will show any variations.
Cutting tools are dangerously sharp, espe-
cially after sharpening. Use extreme caution
when handling these tools to reduce the risk
of personal injury.
Sharpening Wide
Knives
Tools Needed Qty
To sharpen wide knives:
1.
Figure 12.
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