MODEL H7790/H7791
Laminate Trim Router
OWNER'S MANUAL
COPYRIGHT © NOVEMBER, 2005 BY GRIZZLY INDUSTRIAL, INC.
WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE
OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.
#EW7626 PRINTED IN CHINA
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Table of Contents
INTRODUCTION...............................................................................................................2
Foreword.....................................................................................................................2
Contact Information ....................................................................................................2
Machine Data Sheet...................................................................................................3
Identification................................................................................................................4
SECTION 1: SAFETY.......................................................................................................5
Safety Instructions for Machinery ...............................................................................5
Additional Safety Instructions for Laminate Trim Routers..........................................7
Electrical Safety..........................................................................................................8
SECTION 2: OPERATIONS.............................................................................................9
Unpacking/Inventory...................................................................................................9
Removing/Installing Router Bit ...................................................................................9
Adjusting Bit Depth...................................................................................................10
Feed Direction ..........................................................................................................10
Routing Operations...................................................................................................11
Routing Tips .............................................................................................................11
Curved Trim Guide ...................................................................................................12
Straight Guide...........................................................................................................12
Template Guide........................................................................................................14
SECTION 3: ACCESSORIES.........................................................................................15
SECTION 4: MAINTENANCE ........................................................................................17
Router Maintenance .................................................................................................17
Replacing Brushes....................................................................................................17
H7790 Parts..............................................................................................................18
H7791 Parts..............................................................................................................19
WARRANTY AND RETURNS........................................................................................20
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INTRODUCTION
Foreword
Contact Information
We are proud to offer the Grizzly Model
H7790/H7791 Laminate Trim Router.
These models are part of a growing Grizzly
family of fine power tools. When used
according to the guidelines set forth in
this manual, you can expect years of
trouble-free, enjoyable operation and proof
of Grizzly’s commitment to customer sat-
isfaction.
If you have any comments regarding this
manual, please write to us at the following
address:
Grizzly Industrial, Inc.
C/O Technical Documentation
P.O. Box 2069
Bellingham, WA 98227-2069
Most importantly, we stand behind our
tools. If you have any service questions or
parts requests, please call or write us at
the location listed below.
It is our pleasure to provide this manual
with the Model H7790/H7791 Laminate
Trim Router. It was written to encour-
age safety considerations and guide you
through general operating procedures and
maintenance.
Grizzly Industrial, Inc.
1203 Lycoming Mall Circle
Muncy, PA 17756
The specifications, details, and pho-
tographs in this manual represent the
Model H7790/H7791 as supplied when the
manual was prepared. However, owing
to Grizzly’s policy of continuous improve-
ment, changes may be made at any time
with no obligation on the part of Grizzly.
Phone: (570) 546-9663
Fax: (800) 438-5901
E-Mail: [email protected]
Read the manual before operation.
Become familiar with this tool, its
safety instructions, and its operation
before beginning any work. Serious
personal injury may result if safety or
operational information is not under-
stood or followed.
-2-
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Machine Data Sheet
MACHINE DATA
SHEET
Customer Service #: (570) 546-9663 • To Order Call: (800) 523-4777 • Fax #: (800) 438-5901
Laminate Trim Router
Models H7790 and H7791
MODEL
HP
H7790
H7791
5
1
⁄8
⁄2
30,000
RPM
30,000
RPM
NO LOAD SPEED
COLLET SIZE
1
1
⁄4
"
⁄4
"
MAX. BIT
DIAMETER
11⁄8
"
11⁄8
"
WEIGHT
4 lbs.
4 lbs.
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Identification
Model H7790
A
Model H7791
A
D
H
E
B
D
C
F
B
G
C
Figure 1. Router component identification.
A. ON/OFF Switch
B. Collet
C. Base Plate
F. Curved Trim Guide
G. Straight Trim Guide
H. Depth Scale
D. Height Adjustment Lock Knob
E. Height Adjustment Knob
-4-
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SECTION 1: SAFETY
For Your Own Safety Read Instruction Manual
Before Operating This Equipment
The purpose of safety symbols is to attract your attention to possible hazard-
ous conditions. This manual uses a series of symbols and signal words which
are intended to convey the level of importance 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.
Indicates an imminently hazardous situation which, if
not avoided, WILL result in death or serious injury.
Indicates a potentially hazardous situation which, if
not avoided, COULD result in death or serious injury.
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.
This symbol is used to alert the user to useful infor-
NOTICE
mation about proper operation of the equipment.
Safety Instructions for Machinery
4.
ALWAYS
USE
HEARING
1.
2.
READ THROUGH THE ENTIRE
MANUAL BEFORE STARTING
MACHINERY. Machinery presents
serious injury hazards to untrained
users.
PROTECTIONWHENOPERATING
MACHINERY. Machinery noise can
cause permanent hearing damage.
5.
WEAR PROPER APPAREL. DO
NOT wear loose clothing, gloves,
neckties, rings, or jewelry which
may get caught in moving parts.
Wear protective hair covering to
contain long hair and wear non-slip
footwear.
ALWAYS USE ANSI APPROVED
SAFETY
GLASSES
WHEN
OPERATING
MACHINERY.
Everyday eyeglasses only have
impact resistant lenses, they are
NOT safety glasses.
6.
NEVER OPERATE MACHINERY
WHEN TIRED, OR UNDER THE
INFLUENCE OF DRUGS OR
ALCOHOL. Be mentally alert at all
times when running machinery.
3.
ALWAYS WEAR AN ANSI
APPROVED RESPIRATOR WHEN
OPERATING MACHINERY THAT
PRODUCES DUST. Wood dust is
a carcinogen and can cause cancer
and severe respiratory illnesses.
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-5-
7.
ONLY ALLOW TRAINED AND
PROPERLY SUPERVISED PER-
SONNEL TO OPERATE MACHIN-
ERY. Make sure operation instruc-
tions are safe and clearly under-
stood.
17. REMOVE ADJUSTING KEYS
AND WRENCHES. Make a habit
of checking for keys and adjusting
wrenches before turning machinery
ON.
18. CHECK FOR DAMAGED PARTS
BEFORE USING MACHINERY.
Check for binding and alignment
of parts, broken parts, part mount-
ing, loose bolts, and any other
conditions that may affect machine
operation. Repair or replace dam-
aged parts.
8.
9.
KEEP CHILDREN AND VISITORS
AWAY. Keep all children and visi-
tors a safe distance from the work
area.
MAKE
WORKSHOP
CHILD
PROOF. Use padlocks, master
switches, and remove switch keys.
19. USE
RECOMMENDED
10. NEVER LEAVE WHEN MACHINE
IS RUNNING. Turn power OFF
and allow all moving parts to come
to a complete stop before leaving
machine unattended.
ACCESSORIES. Refer to the
instruction manual for recom-
mended accessories. The use of
improper accessories may cause
risk of injury.
20. DO NOT FORCE MACHINERY.
Work at the speed for which
the machine or accessory was
designed.
11. DO NOT USE IN DANGEROUS
ENVIRONMENTS. DO NOT use
machinery in damp, wet locations,
or where any flammable or noxious
fumes may exist.
21. SECUREWORKPIECE.Useclamps
or a vise to hold the workpiece when
practical. A secured workpiece pro-
tects your hands and frees both
hands to operate the machine.
12. KEEP WORK AREA CLEAN AND
WELL LIT. Clutter and dark shad-
ows may cause accidents.
13. USE A GROUNDED EXTENSION
CORDRATEDFORTHEMACHINE
AMPERAGE. Undersized cords
overheat and lose power. Replace
extension cords if they become
damaged. DO NOT use extension
cords for 220V machinery.
22. DO NOT OVERREACH. Keep
proper footing and balance at all
times.
23. MANY MACHINES WILL EJECT
THE WORKPIECE TOWARD THE
OPERATOR. Know and avoid con-
ditions that cause the workpiece to
"kickback."
14. ALWAYS DISCONNECT FROM
POWER
SOURCE
BEFORE
SERVICING MACHINERY. Make
sure switch is in OFF position before
reconnecting.
24. ALWAYS LOCK MOBILE BASES
(IF USED) BEFORE OPERATING
MACHINERY.
15. MAINTAIN MACHINERY WITH
CARE. Keep blades sharp and
clean for best and safest perfor-
mance. Follow instructions for lubri-
cating and changing accessories.
25. BE AWARE THAT CERTAIN
WOODS MAY CAUSE AN ALLER-
GIC REACTION in people and ani-
mals, especially when exposed to
fine dust. Make sure you know
what type of wood dust you will be
exposed to and always wear an
approved respirator.
16. MAKE SURE GUARDS ARE IN
PLACE AND WORK CORRECTLY
BEFORE USING MACHINERY.
-6-
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Additional Safety Instructions
for Laminate Trim Routers
1. READ THE ENTIRE MANUAL: This
8. HOLDING THE WORKPIECE:
Secure the workpiece with clamps
or attach it to an immovable object.
DO NOT hold the workpiece in your
hand or across your legs.
manual contains proper operating
instructions for this router.
2. SAFETY EQUIPMENT: Wear safety
glasses, respirator, and hearing pro-
tection when operating a router.
9. HOLDING THE ROUTER: Hold the
router with both hands to control
torque twist and kickback. Keep
hands away from the spinning bit.
Make sure the bit has come to a
complete stop before setting the
router down.
3. POWER SOURCE: Unplug the
router and make sure the switch is
OFF before inserting or removing bit,
making adjustments, or performing
maintenance or service. DO NOT
make adjustments while the router is
running.
10. ROUTING: Always route with the
base flat upon the workpiece. DO
NOT start the router with the bit in
contact with the workpiece.
4. ROUTER BITS: Inspect router bits
before use. DO NOT use router bits
that have been dropped, cracked, or
damaged. The router bit may shatter,
causing serious injury.
11. FEED DIRECTION: Always feed the
router against the cutter rotation. DO
NOT start routing at a corner. Starting
at a corner may cause the router to
grab, damaging the workpiece, and
possibly causing personal injury.
5. INSTALLING BIT: Insert the bit all
the way into the collet and tighten
firmly. If the bit is not inserted far
enough, the bit may slip or come out,
causing injury. DO NOT use bits with
a diameter larger than 11⁄8".
12. REMOVING THE BIT: The bit is
sharp and will be hot after use. Use
gloves when removing.
6. COLLET WRENCHES: Make sure
the collet wrenches are removed
from the router before turning it ON.
13. WORK AREA: DO NOT use the
router in an area that may contain
hidden live wires. Disconnect all
power leading to the work area.
7. WORKPIECE: Check the workpiece
for nails or other foreign objects
which may cause the router to kick-
back or damage the bit, possibly
causing injury to the operator.
14. TOOL SERVICE: If the router is
damaged, or not working correctly,
repair it before use.
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 personal injury, damage to equipment or poor work results.
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Electrical Safety
Extension Cords
We do not recommend the use of exten-
sion cords, if you find it absolutely neces-
sary:
•
•
•
Use at least a 16 gauge cord that does
not exceed 100 feet in length!
The extension cord must also contain
a ground wire and plug pin.
This tool must have a ground prong
in the plug to help ensure that it is
grounded. DO NOT remove ground
prong from plug to fit into a two-
pronged outlet! If the plug will not
fit the outlet, have the proper outlet
installed by a qualified electrician.
DO NOT use an extension cord that
has cuts, exposed wires, bent/missing
prongs, or other damage.
•
A qualified electrician MUST size cords
over 100 feet long to prevent motor
damage.
Electrocution or fire
could result if this tool
is not grounded cor-
rectly or if your elec-
trical
configuration
does not comply with
local and state codes.
Ensure compliance by
checking with a quali-
fied electrician!
-8-
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SECTION 2: OPERATIONS
Unpacking/Inventory
Removing/Installing
Router Bit
The Model H7790/H7791 was carefully
packed when it left our warehouse. If you
discover the tool is damaged after you
have signed for delivery, please immedi-
ately call Customer Service at (570) 546-
9663 for advice.
This router is supplied with a 1⁄4" collet for
use with 1⁄4" shank router bits. It will accept
router bits up to a 11⁄8" diameter. Carefully
inspect router bits for cracks, chips, or
other damage before installing. DO NOT
use router bits that have been dropped,
cracked, or damaged. The router bit may
shatter causing serious injury.
Save the box and all packing materials for
possible inspection by the carrier or its
agent. Otherwise, filing a freight claim can
be difficult.
To remove or install a router bit:
When you are completely satisfied with
the condition of your shipment, you should
inventory the contents.
1. UNPLUG THE ROUTER AND MAKE
SURE THE SWITCH IS OFF!
2. Loosen the lock knob and adjust the
Model H7790/H7791 Inventory (Figure 2)
A. Router with Base Plate (Not Shown) .1
B. Collet Wrenches................................. 1
C. Template Guide ................................. 1
D. Straight Trim Guide............................ 1
E. Curved Trim Guide ............................ 1
base for access to the collet.
3. Place the collet wrenches as shown
in Figure 3, loosen the collet, and
remove the router bit.
CAUTION: The router bit is sharp and
will be hot after use. Wear gloves to
prevent injury when removing bit.
D
B
C
E
Figure 2. Model H7790/H7791 inventory.
In the event that any nonproprietary parts
are missing (e.g. a nut or a washer), we
would be glad to replace them, or for the
sake of expediency, replacements can be
obtained at your local hardware store.
Figure 3. Loosening the collet.
1
4. Slide the router bit to within
⁄8" of
the bottom of the collet and securely
tighten the collet with the wrenches.
Note: The collet can be damaged if it is
tightened without a bit.
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Adjusting Bit Depth
Feed Direction
Once the bit has been selected and
installed properly, and the depth has been
set, you need to determine the proper
feed direction of the router across the
workpiece:
Unplug the router and make sure
the switch is OFF before inserting or
removing bit, making adjustments, or
performing maintenance or service.
DO NOT make adjustments while the
router is running.
To determine the feed direction:
1. Examine the top face of the workpiece
and determine the direction of the
grain. Feed the router so the bit is
cutting with the grain (cutting along
the growth rings as shown in Figure
5). Cutting against the grain chips the
wood rather than cutting it, making a
rougher surface with more “chip out.”
To adjust the bit depth:
1. UNPLUG THE ROUTER AND MAKE
SURE THE SWITCH IS OFF!
2. Loosen the lock knob shown in Figure
4 and adjust the base to approximately
the desired height.
Height
Adjustment
Knob
Bit
Rotation
Scale
Height
Adjustment
Lock Knob
Feed
Direction
Figure 5. Correct feed direction and grain
orientation (bottom view).
Figure 4. Height adjustment knobs.
2. Always pass the router across the
workpiece so the bit is rotating oppo-
site the feed direction as shown in
Figure 5. If the cutters are moving in
the same direction you are feeding
the router, you are performing a “climb
cut.” This is a very dangerous opera-
tion because the router could lunge
forward out of your hands, causing
serious personal injury.
3. Fine tune the depth of the router bit by
using a measuring device, or place the
router on the workpiece and eyeball
the depth for an approximate measure-
ment.
Note: The scale on the Model H7791
is not calibrated to any specific point.
Only use it for reference when making
incremental changes.
4. Tighten the lock knob to secure the
base plate.
5. Plug in the router and make a test run
in a scrap piece of wood to make sure
the depth is correct.
-10-
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Routing Operations
Routing Tips
Once the router bit is installed, the depth is
set, and the feed direction is determined, it
is time to start routing.
•
Performing routing operations in mul-
tiple passes produces smoother results
with less chance of “chip out” and burn-
ing of the workpiece. It also reduces
the possibility of the router jerking out
of your hands from trying to remove too
much material in one pass.
To perform routing operations:
1. Secure the workpiece to a stable sur-
face.
•
•
•
Cutting end grain with the router will
cause tearout. Cutting the end grain
first allows the tearout to be trimmed off
by the side cuts.
2. Place the router flat on the surface of
the workpiece, making sure that the bit
is not touching the workpiece.
3. Firmly grasp the router and turn the
switch ON.
Feed the router in a counterclock-
wise direction when routing the outside
edges of a workpiece. Feed the router
clockwise when routing interior holes.
CAUTION: The router will "kick" when
started. If it comes into contact with
the workpiece it could jump out of your
hands and cause injury.
The correct feed speed depends on the
speed of the router, bit size, shape, and
sharpness, and the characteristics of
the workpiece. Feeding the router too
fast will cause chatter marks, chip out,
and possibly damage the bit and motor.
Feeding the router too slow will cause
burn marks and extra build-up on the
router bit. Make a test cut on a sample
scrap of the workpiece to determine the
correct feed speed. A router fed at the
correct speed should make large, thin
shavings.
4. Smoothly move the router in the correct
feed direction into the workpiece.
CAUTION: DO NOT start routing at
a corner. Starting at a corner may
cause the router to grab, damaging the
workpiece corner, and possibly causing
personal injury.
5. Feed the router along the workpiece at
a consistent rate of speed. Be aware
of the sound of the router motor and
the sound of the bit cutting. If the motor
begins to bog down, or the sound pitch
of the router bit lowers, reduce the feed
rate.
6. When finished routing, turn the router
OFF, and allow it to come to a com-
plete stop before setting it down.
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Curved Trim Guide
Straight Guide
The curved trim guide is used for trimming
curved surfaces, such as adding a deco-
rative edge to a round table or trimming
curved corners on a laminate countertop.
The straight guide can be used for trim-
ming, cutting dadoes, straight dovetails,
and for cutting circles.
Only use router bits with no guide bearing
when using the straight guide.
This guide is only necessary with router
bits that do not have a guide bearing. The
bushing in the curved trim guide rides
along the edge of the workpiece guiding
the router bit.
To use the straight guide tor trimming:
1. Slide the straight guide onto the base
plate as shown in Figure 7, then set
the guide height and tighten the lock
knob.
To use the curved trim guide:
1. Slide the trim guide onto the base
plate as shown in Figure 6, set the
guide height, and tighten the height
adjustment lock knob.
Height
Adjustment
Lock Knob
Depth
Adjustment
Figure 7. Straight guide installation.
Depth
Adjustment
Lock Knob
2. Loosen the wing nut and slide the
straight guide to approximately the
desired depth.
Figure 6. Curved trim guide adjustments.
2. Loosen the depth adjustment lock knob
and turn the depth adjustment to adjust
the depth of cut.
3. Follow the instructions in Routing
Operations on Page 11 and make a
test cut by sliding the straight guide
along the edge of a scrap piece of
wood.
3. Follow the instructions in Routing
Operations on Page 11 and make a
test cut by sliding the guide bushing
along the edge of a scrap piece of
wood.
4. TURN OFF AND UNPLUG THE
ROUTER, then make the necessary
adjustments to the straight guide.
4. TURN OFF AND UNPLUG THE
ROUTER, then make the necessary
adjustments to the height and depth of
the curved trim guide.
5. Repeat Steps 2–4 until the cut is cor-
rect.
5. Repeat Steps 1–4 until the cut is the
correct height and depth.
-12-
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To use the straight guide for interior
cuts.
To use the straight guide for cutting
circles.
1. Set up the straight guide as explained
for trimming, but adjust the guide to
allow the router bit to follow an interior
slot.
1. Set up the straight guide as shown in
Figure 9 with the guide plate facing
up.
Note: The router will cut circles from
23⁄4"–43⁄4" when the lock bolt is placed in
the hole closest to the router and it can
cut circles from 43⁄4"–85⁄8" when the lock
bolt is placed in the hole farthest from
the router.
Note: When cutting interior slots,
the router will tend to wander toward
the guide. Keep a constant pressure
towards the workpiece, and pull the
router towards you, instead of pushing
the router.
2. Make sure there is enough excess
material at the end of the cut to support
the straight guide. If the guide slips
off of the end of the workpiece, it will
wander off of the desired line. You may
wish to add a longer piece of wood to
the workpiece for the straight guide to
follow.
3. Follow the instructions in Routing
Operations on Page 11 to make the
desired cut as shown in Figure 8.
Figure 9. Guide setup for cutting circles.
2. Use a compass to mark the desired
circle on the workpiece, then drive a
small nail into the workpiece at the
center of the circle.
3. Place the hole in the straight guide
over the nail, then loosen the lock bolt
and adjust the guide until the router bit
aligns with the marked circle.
4. Adjust the router to the desired depth.
5. Lift the router above the surface, turn it
ON, and then carefully lower it into the
workpiece.
Figure 8. Routing a slot.
6. Rotate the router in a clockwise direc-
tion, using the nail as the pivot point.
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Guidelines for building the template:
Template Guide
1. MDF is the most common template
material, but the template can be made
out of any material that is flat on the top
and bottom, and is at least 3⁄16" thick.
The template guide allows the router to
follow a template or pattern. This setup
is necessary when routing interior slots
where a bit with a guide bearing will not
fit.
2. Take into account the diameter of the
template guide when calculating the
size of the template. The diameter of
the bushing (X in Figure 12), minus the
diameter of the router bit (R), divided
by 2, gives you the template offset as
shown in Figure 13.
To install the template guide:
1. Remove the screws securing the bot-
tom of the router base as shown in
Figure 10.
�
�
Figure 12. Calculating template offset.
Figure 10. Installing the template guide.
�
�
�
2. Set the template guide into the groove
in the upper portion of the router base
and re-install the bottom portion of the
router base.
�
�
�
�
�
�
�
�
�
�
�
�
�
�
�
�
�
�
�
�
�
�
�
�
�
3. Install a router bit that has a diameter of
1
��������
������
⁄4" or less (see Figure 11).
����������
���������
Figure 13. Using the template guide.
3. Attach the template to the workpiece
with screws or other removable fas-
teners. Make sure the fasteners are
installed in areas where the router bit
will not cut and recessed so the router
base will not catch on the fastener.
Using the template guide:
Figure 11. Router bit installed through the
template guide.
1. Use a bandsaw to remove excess
wood around the template.
2. Press the template guide into the tem-
plate and follow the edge.
-14-
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SECTION 3: ACCESSORIES
1
H5554—20 Pc. Carbide
Set
H3168—30 Pc. Carbide
Set
⁄
4" Router Bit
4" Router Bit
G7984—Face Shield
H1298—Dust Sealed Safety Glasses
H1300—UV Blocking, Clear Safety
Glasses
1
⁄
H2347—Uvex® Spitfire Safety Glasses
H0736—Shop Fox® Safety Glasses
Safety Glasses are essential to every
shop. If you already have a pair, buy
extras for visitors or employees. You can't
be too careful when it comes to shop
safety!
Grizzly Industrial carries an extensive
1
selection of
⁄4" shank router bits. The
following router bit sets are a very small
portion of what Grizzly carries. For the lat-
est models and pricing, check our website,
800-523-4777.
H1300
H1298
G7984
H0736
H2347
Figure 16. Model H5554 20-Pc. 1⁄4" shank
Figure 14. Our most popular safety
glasses.
router bit set.
H2499—Small Half-Mask Respirator
H3631—Medium Half-Mask Respirator
H3632—Large Half-Mask Respirator
H3635—Disposable Cartridge Filter Pr.
Wood dust is now considered a known
carcinogen and has been linked to nasal
cancer and severe respiratory illnesses.
If you work around dust everyday, a half-
mask respirator can be a lifesaver. Also
compatible with safety glasses!
Figure 17. Model H3168 30 pc. 1⁄4" shank
router bit set.
Figure 15. Half-mask respirator and
disposable cartridge filters.
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G1530—Router Pad
G6474—Router Magic
This natural rubber pad eliminates hold-
ing or clamping work while routing or
sanding. It effectively grips the workpiece
for safe non-slip routing. Thin pad can be
easily rolled up and stored when not in
use. Pad measures 1⁄8" x 24" x 36"
Teach your router to do magic you never
dreamed possible. All you need are a
handful of router bits and the extraordi-
nary jigs, fixtures and techniques inside
this book. More than 50 new jigs and
fixtures with step-by-step instructions. 314
pages.
Figure 18. G1530 router pad.
Figure 20. G6474 Router Magic.
G3468—Step Gauge
H4836—The Art of the Router
Use this solid brass router gauge to set
consistent router bit depth. Measures in
1⁄16" increments. Also includes decimal
equivalents. Made in USA.
This book stresses the versatility and
cutting efficiency of this essential tool.
Describes router bits, tables, and joinery
techniques. But most of it is devoted to
router projects, as artisans reveal their
secret techniques and favorite ways to
use the tool. 144 pages.
Figure 19. G3468 Step Gauge.
Figure 21. H4836 The Art of the Router
-16-
Model H7790/H7791 Laminate Trim Router
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SECTION 4: MAINTENANCE
Router Maintenance
Replacing Brushes
Motor brushes will become loaded with
carbon deposits or wear out over time.
Extend the life of the motor brushes by
removing them periodically and cleaning
off the carbon deposits.
Always disconnect
power to the machine
before
performing
maintenance. Failure
to do this may result
in serious personal
injury.
If the motor will not run, makes squealing
or grinding noises, or performance is dra-
matically decreased, check to see if the
motor brushes need to be replaced. When
replacing the motor brushes, replace both
at the same time.
Router maintenance is simple. Keep the
router free from dust, dirt and grease and
always store it in a dry place. Plastic parts
can easily be cleaned with a damp cloth,
but never use water to clean any electrical
parts. Solvents should also be avoided
on plastic because of the possibility of
damage.
To replace the motor brushes:
1. Remove the caps on the sides of the
motor housing as shown in Figure
22.
Inspect the router for loose parts, dam-
aged cord or switch, and inspect the
bits for chips or cracks. Replace the bit
if it is worn or damaged. Continuous
use of a worn or damaged bit will not
only decrease working efficiency, but also
overload the motor, so the bit must be
frequently checked.
With the exception of the motor brushes,
the electrical components of this router
are not user serviceable.
Figure 22. Replacing the motor brushes.
2. Replace the motor brushes and re-
install the caps.
Contact our Technical Support at (570)
546-9663 for any repair work that requires
opening the motor housing and for replace-
ment parts.
Model H7790/H7791 Laminate Trim Router
-17-
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H7790 Parts
REF PART #
DESCRIPTION
REF PART #
DESCRIPTION
1
2
4
5
6
7
8
9
PWRCRD110L POWER CORD 110V, W/PLUG
20 PFH19M
FLAT HD SCR M4-.7 X 10
ADJUSTING KNOB M6-1 X 20
BLOCK
TRIM GUIDE PLATE
SHOULDER SCREW M5-.8 X 11
BUSHING
BASE PLATE
TAP SCREW M4 X 10
COLLET NUT
PH7790002
PH7790004
P627
STRAIN RELIEF
BACK COVER
21 PH7790021
22 PH7790022
23 PH7790023
24 PH7790024
25 PH7790025
26 PH7790026
27 PHTEK15M
28 PH7790028
29 PH7790029
30 PH7790030
31 PH7790031
32 PH7790032
33 PH7790033
34 PH7790034
35 PH7790035
36 PH7790036
37 PH7790037
BALL BEARING 627ZZ
SET SCREW M4-.7 X 10
BRUSH COVER
CARBON BRUSH
BRUSH TUBE
PSS23M
PH7790007
PH7790008
PH7790009
10 PS02M
11 PH7790011
12 PS85M
13 PH7790013
14 PH7790014
15 PH7790015
16 P6200
17 PH7790017
18 PH7790018
19 PH7790019
PHLP HD SCR M4-.7 X 12
STATOR
PHLP HD SCR M4-.7 X 60
SHELL
COLLET
SWITCH
CLASPING KNOB
GEAR GUIDING KNOB
STRAIGHT GUIDE
WRENCH 10MM
WRENCH 17MM
GUIDE ADJ BRACKET
TEMPLATE GUIDE
ROTOR
OUTSIDE COVER
BALL BEARING 6200ZZ
LOCK KNOB M6-1 X 25
TRIM GUIDE BRACKET
KNOB RETAINER
-18-
Model H7790/H7791 Laminate Trim Router
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H7791 Parts
REF PART #
DESCRIPTION
REF PART #
DESCRIPTION
1
2
3
4
5
6
7
8
PH7791001
POWER CABLE
CABLE JACKET
BACK COVER
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
PH7790021
ADJUSTING KNOB M6-1 X 20
BLOCK
TRIM GUIDE PLATE
SHOULDER SCREW M5-.8 X 11
BUSHING
BASE PLATE
TAP SCREW M4 X 10
COLLET NUT
PH7791002
PH7791003
PH7791004
PS56M
PH7790022
PH7790023
PH7790024
PH7790025
PH7790026
PHTEK15M
PH7790028
PH7790029
P6200
CABLE CLAMP
PHLP HD SCR M4-.7 X 16
BALL BEARING 627ZZ
BEARING GASKET
BRUSH TUBE
BRUSH COVER
CARBON BRUSH
MID COVER
SHELL
STATOR
PHLP HD SCR M4-.7 X 70
ROTOR
OUTSIDE COVER
LOCK KNOB M6-1 X 25
TRIM GUIDE BRACKET
KNOB RETAINER
FLAT HD SCR M4-.7 X 10
P627
PH7791007
PH7791008
PH7791009
PH7791010
PH7791011
PH7791012
PH7791013
PH7791014
PH7791015
PH7791016
PH7790017
PH7790018
PH7790019
PFH19M
9
COLLET
BALL BEARING 6200ZZ
SWITCH
10
11
12
13
14
15
16
17
18
19
20
PH7791031
PS65M
PHLP HD SCR M4-.7 X 40
CLASPING KNOB
LIFT GEAR
GEAR GUIDING KNOB
STRAIGHT GUIDE
WRENCH 10MM
WRENCH 17MM
GUIDE ADJ BRACKET
TEMPLATE GUIDE
PH7790031
PH7791034
PH7790032
PH7790033
PH7790034
PH7790035
PH7790036
PH7790037
Model H7790/H7791 Laminate Trim Router
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-19-
WARRANTY AND RETURNS
Grizzly Industrial, Inc. warrants every product it sells for a period of 1 year to the original
purchaser from the date of purchase. This warranty does not apply to defects due directly
or indirectly to misuse, abuse, negligence, accidents, repairs or alterations or lack of
maintenance. This is Grizzly’s sole written warranty and any and all warranties that may
be implied by law, including any merchantability or fitness, for any particular purpose, are
hereby limited to the duration of this written warranty. We do not warrant or represent that
the merchandise complies with the provisions of any law or acts unless the manufacturer so
warrants. In no event shall Grizzly’s liability under this warranty exceed the purchase price
paid for the product and any legal actions brought against Grizzly shall be tried in the State
of Washington, County of Whatcom.
We shall in no event be liable for death, injuries to persons or property or for incidental,
contingent, special, or consequential damages arising from the use of our products.
To take advantage of this warranty, contact us by mail or phone and give us all the details.
We will then issue you a “Return Authorization Number,” which must be clearly posted on
the outside as well as the inside of the carton. We will not accept any item back without this
number. Proof of purchase must accompany the merchandise.
The manufacturers reserve the right to change specifications at any time because they
constantly strive to achieve better quality equipment. We make every effort to ensure that
our products meet high quality and durability standards and we hope you never need to
use this warranty.
Please feel free to write or call us if you have any questions about the machine or the
manual.
Grizzly Industrial, Inc.
1203 Lycoming Mall Circle
Muncy, PA 17756
Phone: (570) 546-9663
Fax: (800) 438-5901
E-Mail:
Thank you again for your business and continued support. We hope to serve you again
soon!
-20-
Model H7790/H7791 Laminate Trim Router
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WARRANTY CARD
Name_________________________________________________________________
Street_________________________________________________________________
City _______________________ State_________________________ Zip _________
Phone #____________________ Email ________________________ Invoice #_____
Model # ____________________ Order #_______________________ Serial #______
The following information is given on a voluntary basis. It will be used for marketing purposes to
help us develop better products and services. All information is strictly confidential.
1. How did you learn about us?
____Advertisement
____Friend
____Catalog
____Card Deck
____Website
Other:________________________
2. Which of the following magazines do you subscribe to?
____ Cabinet Maker
____ Family Handyman
____ Hand Loader
____ Handy
____ Home Shop Machinist ____ Precision Shooter
____ Journal of Light Cont. ____ Projects in Metal
____ Popular Mechanics
____ Popular Science
____ Popular Woodworking ____ Wooden Boat
____ Practical Homeowner ____ Woodshop News
____ Today’s Homeowner
____ Wood
____ Woodsmith
____ Woodwork
____ Live Steam
____ Model Airplane News ____ Rifle
____ Modeltec
____ Old House Journal
____ RC Modeler
____ Woodworker West
____ Woodworker’s Journal
____ Other:
____ Shop Notes
____ Shotgun News
3. What is your annual household income?
____$20,000-$29,000
____$30,000-$39,000
____$40,000-$49,000
____$70,000+
____$50,000-$59,000
____$60,000-$69,000
4. What is your age group?
____20-29
____30-39
____60-69
____40-49
____70+
____50-59
5. How long have you been a woodworker/metalworker?
____0-2 Years ____2-8 Years ____8-20 Years
____20+ Years
6. How many of your machines or tools are Grizzly?
____0-2 ____3-5 ____6-9
____10+
____No
____No
7. Do you think your machine represents a good value? ____Yes
8. Would you recommend Grizzly Industrial to a friend? ____Yes
9. Would you allow us to use your name as a reference for our customers in your area?
Note: We never use names more than 3 times. ____Yes ____No
10. Comments:_________________________________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
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Send a Grizzly Catalog to a friend:
Name________________________________
Street________________________________
City______________State______Zip_______
FOLD ALONG DOTTED LINE
Place
Stamp
Here
GRIZZLY INDUSTRIAL, INC.
P.O. BOX 2069
BELLINGHAM, WA 98227-2069
TAPE ALONG EDGES--PLEASE DO NOT STAPLE
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