Grizzly G0776 User manual

MODEL G0776
13" x 40" GUNSMITH LATHE w/DRO
OWNER'S MANUAL
(For models manufactured since 7/14)
COPYRIGHT © MARCH, 2015 BY GRIZZLY INDUSTRIAL, INC. REVISED NOVEMBER, 2017 (HE)
WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE
OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.
#WK17052 PRINTED IN CHINA V1.11.17

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.

Table of Contents
INTRODUCTION............................................... 3
Machine Description ...................................... 3
Contact Info.................................................... 3
Manual Accuracy ........................................... 3
Identification ................................................... 4
Controls & Components ................................. 5
Machine Data Sheet ...................................... 8
SECTION 1: SAFETY..................................... 11
Safety Instructions for Machinery ................ 11
Additional Safety for Metal Lathes ............... 13
Additional Chuck Safety ............................... 14
Glossary of Terms ....................................... 15
SECTION 2: POWER SUPPLY ...................... 16
SECTION 3: SETUP ....................................... 18
Preparation .................................................. 18
Unpacking .................................................... 18
Needed for Setup ......................................... 18
Inventory ...................................................... 19
Cleanup ........................................................ 20
Site Considerations ...................................... 21
Lifting & Placing ........................................... 22
Anchoring to Floor ....................................... 23
Leveling ........................................................ 23
Lubricating Lathe ......................................... 24
Adding Coolant ............................................ 24
Power Connection........................................ 24
Assembly ..................................................... 25
Test Run ...................................................... 26
Spindle Break-In .......................................... 28
Recommended Adjustments ........................ 28
SECTION 4: OPERATION.............................. 29
Operation Overview ..................................... 29
Chuck & Faceplate Mounting....................... 30
Camlock Stud Installation ............................ 30
Chuck Safety & Support Devices ................ 31
Chuck Installation......................................... 31
Chuck Removal............................................ 33
Scroll Chuck Clamping ................................ 33
Chuck Jaw Reversal .................................... 34
4-Jaw Chuck ................................................ 34
Faceplate ..................................................... 35
Tailstock ....................................................... 36
Centers ........................................................ 41
Steady Rest ................................................. 43
Follow Rest .................................................. 44
Carriage & Slide Locks ................................ 45
Compound Rest ........................................... 45
Tool Post ...................................................... 46
Manual Feed ................................................ 47
Spider ........................................................... 48
Spindle Speed.............................................. 48
Power Feed.................................................. 50
End Gears .................................................... 52
Threading ..................................................... 55
Coolant System............................................ 59
SECTION 5: ACCESSORIES......................... 60
SECTION 6: MAINTENANCE......................... 65
Schedule ...................................................... 65
Cleaning/Protecting ...................................... 65
Lubrication ................................................... 66
Coolant System Service .............................. 71
Machine Storage .......................................... 73
SECTION 7: SERVICE ................................... 74
Troubleshooting ........................................... 74
Adjusting Backlash....................................... 77
Adjusting Gib................................................ 78
Adjusting Half Nut ........................................ 80
Replacing Shear Pin .................................... 80
Adjusting Feed Clutch .................................. 81
Adjusting Tailstock Lock .............................. 82
Tensioning/Replacing V-Belts ...................... 83
Adjusting Spindle Bearing Preload .............. 84
Removing/Installing Gap Insert .................... 86
Checking/Replacing Brake Shoes ............... 87
SECTION 8: WIRING...................................... 89
Wiring Safety Instructions ............................ 89
Wiring Overview ........................................... 90
Component Location Index .......................... 90
Electrical Cabinet Wiring .............................. 91
Electrical Cabinet ......................................... 92
Spindle Motor Wiring ................................... 93
Control Panel Wiring .................................... 94
Coolant Pump & Brake Wiring ..................... 95
Additional Component Wiring ...................... 96
Power Connection Wiring ............................ 96

SECTION 9: PARTS....................................... 97
Stand/Brake/Coolant Pump ......................... 97
Headstock .................................................... 99
Headstock Controls.................................... 101
Gearbox ..................................................... 103
Gearbox Controls ....................................... 105
Change Gears............................................ 107
Apron ......................................................... 108
Cross Slide................................................. 110
Compound Rest & Tool Post ..................... 112
Tailstock ..................................................... 114
Lathe Bed & Motor ..................................... 116
Feed Rod ................................................... 118
Steady & Follow Rest ................................ 120
Electrical .................................................... 121
Digital Readout .......................................... 123
Accessories ................................................ 125
Labels & Cosmetics ................................... 126
WARRANTY AND RETURNS ...................... 129

Model G0776 (Mfd. Since 7/14) -3-
INTRODUCTION
The Model G0776 13" x 40" Gunsmith Lathe fea-
tures a 2-axis digital readout, 8-speed gearhead,
powerful 2 HP motor, and a D1-4 spindle with
a generous 1.57" bore. This model is equipped
with a flood coolant system, as well as safety fea-
tures such as halogen worklight and foot brake.
The included outboard spindle “spider” support
provides exceptional stability and alignment for
professional gunsmiths.
This lathe is packed with high-end features and all
the essential accessories you need to get started.
Machine Description
We are proud to provide a high-quality owner’s
manual with your new machine!
We
made every effort to be exact with the
instruc-
tions, specifications, drawings, and photographs
in this manual. Sometimes we make mistakes, but
our policy of continuous improvement also means
that
sometimes the machine
you receive is
slightly different than shown in the manual
.
If you find this to be the case, and the difference
between the manual and machine leaves you
confused or unsure about something
,
check our
website for an updated version. W
e post
current
manuals and
manual updates for free
on our web-
site at
www.grizzly.com.
Alternatively, you can call our Technical Support
for help. Before calling, make sure you write down
the
Manufacture Date and Serial Number
from
the machine ID label (see below). This information
is required for us to provide proper tech support,
and it helps us determine if updated documenta-
tion is available for your machine.
Manufacture Date
Serial Number
Manual Accuracy
We stand behind our machines! If you have ques-
tions or need help, contact us with the information
below. Before contacting, make sure you get the
serial number
and manufacture date from the
machine ID label. This will help us help you faster.
Grizzly Technical Support
1815 W. Battlefield
Springfield, MO 65807
Phone: [phone]
Email: [email protected]
We want your feedback on this manual. What did
you like about it? Where could it be improved?
Please take a few minutes to give us feedback.
Grizzly Documentation Manager
P.O. Box 2069
Bellingham, WA 98227-2069
Email: [email protected]
Contact Info

-4- Model G0776 (Mfd. Since 7/14)
Identification
Serious personal injury could occur if
you connect the machine to power before
completing the setup process. DO NOT
connect power until instructed to do so later
in this manual.
Untrained users have an increased risk
of seriously injuring themselves with this
machine. Do not operate this machine until
you have understood this entire manual and
received proper training.
BD
CH
J K L
M
S
T
U
V
W
O
N
E
FG
A
R
P
Q
I
A. Headstock
B. DRO Unit
C. D1-4 Camlock MT#5 Spindle
D. 3-Jaw Chuck 6"
E. Quick-Change Tool Post
F. Follow Rest
G. Halogen Work Lamp
H. Coolant Valve and Nozzle
I. Compound Rest
J. Cross Slide
K. Steady Rest
L. Tailstock (see Page 6 for details)
M. Longitudinal Leadscrew
N. Feed Rod
O. Control Rod
P. Coolant Reservoir and Pump Access
Q. Chip Tray
R. Carriage (see Page 6 for details)
S. Foot Brake
T. Stand Mounting Points
U. Storage Cabinet
V. Quick-Change Gearbox Controls (see Page 5
for details)
W. Headstock Controls (see Page 5 for details)

Model G0776 (Mfd. Since 7/14) -5-
Controls &
Components
Headstock
A.Spindle Speed Range Lever: Selects
between high and low spindle speed ranges.
B.Spindle Speed Lever: Selects one of four
different spindle speeds within the selected
speed range.
C. Headstock Feed Direction Lever: Controls
rotation direction of leadscrew and feed rod.
D.Thread and Feed Chart: Shows how to
arrange gearbox controls for different thread-
ing or feeding options.
E.Quick-Change Gearbox Levers and Dial:
Controls leadscrew and feed rod speed for
threading and feeding operations.
Figure 2. Headstock controls and components.
B
E
C
A
D
Refer to Figures 1–8 and the following descrip-
tions to become familiar with the basic controls of
this lathe.
Many of the controls will be explained in greater
detail later in this manual.
Main Power Switch
The rotary switch shown in Figure 1 toggles
incoming power ON and OFF to the lathe controls.
To reduce your risk of
serious injury, read this
entire manual BEFORE
using machine.
Figure 1. Location of the main power switch.
Main Power
Switch

-6- Model G0776 (Mfd. Since 7/14)
Carriage
F.Quick-Change Tool Post: Allows the opera-
tor to quickly load and unload tools.
G.Compound Rest Handwheel: Moves tool
toward and away from workpiece at preset
angle.
H.Carriage Lock: Secures carriage in place for
greater rigidity when it should not move.
I. Thread Dial: Indicates when to engage the
half nut during inch threading operations.
J.Spindle Lever: Starts, stops, and reverses
direction of spindle rotation.
K.Half Nut Lever: Engages/disengages half
nut for threading operations.
L.Carriage Handwheel: Moves carriage along
the bed.
M.Cross Slide Handwheel: Moves cross slide
toward and away from workpiece.
N.Feed Selection Lever: Selects power feed
for carriage or cross slide.
Tailstock
O.Quill Lock Lever: Secures quill in position.
P.Tailstock Lock Lever: Secures tailstock in
position along the bedway.
Q.Graduated Scale: Indicates quill movement
in increments of 0.001" with one full revolu-
tion equaling 0.100" of quill travel.
R.Quill: Holds centers and tooling.
S.Tailstock Offset Screws: Adjusts tailstock
offset left or right from spindle centerline
(1 of 2).
T.Quill Handwheel: Moves quill toward or
away from spindle.
U.Offset Scale: Indicates relative distance of
tailstock offset from spindle centerline.
V.Offset Locking Set Screw: Locks tailstock
in position left or right of spindle centerline.
Figure 3. Carriage controls.
F
G
H
I
J
K
L
M
N
Figure 4. Tailstock controls.
OP
Q
R
Figure 5. Additional tailstock controls.
S
T
U
V

Model G0776 (Mfd. Since 7/14) -7-
End Gears
Figure 7. End gear components.
End
Gears
Configuring the end gears (shown in Figure 7)
controls the speed of the leadscrew for threading
or the feed rod for power feed operations.
Safety Foot Brake
This lathe is equipped with a foot brake (see
Figure 8) to quickly stop the spindle instead of
allowing the spindle to coast to a stop on its own.
Pushing the foot brake while the spindle is ON
cuts power to the motor and stops the spindle.
After the foot brake is used, the spindle lever must
be returned to the OFF (middle) position to reset
the spindle switches before re-starting spindle
rotation.
Figure 8. Foot brake and spindle lever.
Foot Brake
Spindle Lever
Control Panel
W.Power Lamp: Illuminates when main power
switch is turned ON and EMERGENCY STOP
button is reset.
X.Jog/Inching Button: Powers forward spindle
rotation as long as it is pressed.
Y. Coolant Pump Switch: Controls coolant
pump motor.
Z.EMERGENCY STOP Button: Stops all
machine functions. Twist clockwise to reset.
Figure 6. Control panel.
W
X
YZ

-8- Model G0776 (Mfd. Since 7/14)
The information contained herein is deemed accurate as of 11/16/2017 and represents our most recent product specifications.
Due to our ongoing improvement efforts, this information may not accurately describe items previously purchased. PAGE 1 OF 3
Model G0776
MACHINE DATA
SHEET
Customer Service #: [phone] · To Order Call: [phone] · Fax #: [phone]
MODEL G0776 13" X 40" GUNSMITHING LATHE WITH DRO
Product Dimensions:
Weight............................................................................................................................................................ 1280 lbs.
Width (side-to-side) x Depth (front-to-back) x Height..................................................................... 74-1/2 x 31 x 58 in.
Footprint (Length x Width)............................................................................................................... 70-1/2 x 19-3/4 in.
Shipping Dimensions:
Type.......................................................................................................................................................... Wood Crate
Content........................................................................................................................................................... Machine
Weight............................................................................................................................................................ 1370 lbs.
Length x Width x Height....................................................................................................................... 74 x 30 x 60 in.
Must Ship Upright................................................................................................................................................... Yes
Electrical:
Power Requirement........................................................................................................... 220V, Single-Phase, 60 Hz
Full-Load Current Rating....................................................................................................................................... 8.5A
Minimum Circuit Size.............................................................................................................................................. 15A
Connection Type....................................................................................................................................... Cord & Plug
Power Cord Included.............................................................................................................................................. Yes
Power Cord Length.............................................................................................................................................. 6.5 ft.
Power Cord Gauge......................................................................................................................................... 14 AWG
Plug Included........................................................................................................................................................... No
Recommended Plug Type.......................................................................................................................... NEMA 6-15
Switch Type............................................................................................ Control Panel w/Magnetic Switch Protection
Motors:
Spindle
Horsepower................................................................................................................................................ 2 HP
Phase............................................................................................................................................ Single-Phase
Amps........................................................................................................................................................... 8.5A
Speed................................................................................................................................................ 1720 RPM
Type................................................................................................................. TEFC Capacitor-Start Induction
Power Transfer ............................................................................................................................... V-Belt Drive
Bearings........................................................................................................... Shielded & Permanently Sealed
Main Specifications:
Operation Info
Swing Over Bed.................................................................................................................................... 13.70 in.
Distance Between Centers........................................................................................................................ 40 in.
Swing Over Cross Slide.......................................................................................................................... 7.71 in.
Swing Over Saddle............................................................................................................................... 11.75 in.
Swing Over Gap................................................................................................................................... 18.50 in.
Maximum Tool Bit Size............................................................................................................................. 5/8 in.
Compound Travel.................................................................................................................................. 3-1/4 in.
Carriage Travel.......................................................................................................................................... 33 in.
Cross Slide Travel................................................................................................................................. 5-7/8 in.
Machine Data Sheet