Page 3 - Table of Contents
Table of Contents INTRODUCTION ............................................... 3 Machine Description ...................................... 3Contact Info.................................................... 3Manual Accuracy ........................................... 3Identification (G0768).............
Page 5 - INTRODUCTION; Machine Description; Manual Accuracy; Contact Info
Model G0768/G0769 (Mfd. Since 8/15) -3- INTRODUCTION 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...
Page 8 - Components; Headstock
-6- Model G0768/G0769 (Mfd. Since 8/15) Controls & Components Refer to Figures 3–8 and the following descrip- tions to become familiar with the basic controls of this machine. To reduce your risk of serious injury, read this entire manual BEFORE using machine. Headstock F. Lathe/Mill Selector Sw...
Page 9 - Tailstock
Model G0768/G0769 (Mfd. Since 8/15) -7- Tailstock End Gears, Pulleys, V-Belts U. End Gears: The configuration of the end gears controls the leadscrew speed for power feeding, and inch and metric threading. V. V-Belts: Transfer power from motor to idler and spindle pulleys. The position of the top V-...
Page 15 - For Your Own Safety, Read Instruction; NOTICE; Safety Instructions for Machinery
Model G0768/G0769 (Mfd. Since 8/15) -13- ELECTRICAL EQUIPMENT INJURY RISKS. You can be shocked, burned, or killed by touching live electrical components or improperly grounded machinery. To reduce this risk, only allow qualified service personnel to do electrical installation or repair work, and alw...
Page 17 - Additional Safety for Metal Lathes
Model G0768/G0769 (Mfd. Since 8/15) -15- Additional Safety for Metal Lathes CLOTHING, JEWELRY & LONG HAIR. Tie back long hair, remove jewelry, and do not wear loose clothing or gloves. These can easily get caught on rotating parts and pull you into lathe. ROTATING PARTS. Always keep hands and bo...
Page 18 - Additional Safety for Mills/Drills
-16- Model G0768/G0769 (Mfd. Since 8/15) Additional Safety for Mills/Drills UNDERSTAND ALL CONTROLS. Make sure you understand the function and proper use of all controls before starting. This will help you avoid making mistakes that result in serious injury. WEAR FACE SHIELD. Always wear a face shie...
Page 19 - Additional Lathe Chuck Safety
Model G0768/G0769 (Mfd. Since 8/15) -17- Additional Lathe Chuck Safety ENTANGLEMENT. Entanglement with a rotat-ing chuck can lead to death, amputation, broken bones, or other serious injury. Never attempt to slow or stop the lathe chuck by hand, and always roll up long sleeves, tie back long hair, a...
Page 20 - SECTION 2: POWER SUPPLY; Availability
-18- Model G0768/G0769 (Mfd. Since 8/15) SECTION 2: POWER SUPPLY Availability Before installing the machine, consider the avail-ability and proximity of the required power supply circuit. If an existing circuit does not meet the requirements for this machine, a new circuit must be installed. To mini...
Page 23 - Inventory
Model G0768/G0769 (Mfd. Since 8/15) -21- Inventory The following is a list of items shipped with your machine. Before beginning setup, lay these items out and inventory them. If any non-proprietary parts are missing (e.g. a nut or a washer), we will gladly replace them; or for the sake of expediency...
Page 24 - Cleanup
-22- Model G0768/G0769 (Mfd. Since 8/15) The unpainted surfaces of your machine are coated with a heavy-duty rust preventative that prevents corrosion during shipment and storage. This rust preventative works extremely well, but it will take a little time to clean. Be patient and do a thorough job c...
Page 25 - Site Considerations; Weight Load
Model G0768/G0769 (Mfd. Since 8/15) -23- Site Considerations Weight Load Refer to the Machine Data Sheet for the weight of your machine. Make sure that the surface upon which the machine is placed will bear the weight of the machine, additional equipment that may be installed on the machine, and the...
Page 27 - Mounting
Model G0768/G0769 (Mfd. Since 8/15) -25- Mounting —If mounting machine to a stand, follow the instructions included with it. Ensure stand is anchored to floor. The chip pan and lathe base have holes that allow the machine to be mounted to the optional Model T26599 Stand (see Figure 15) or a workbenc...
Page 28 - Assembly; Leveling
-26- Model G0768/G0769 (Mfd. Since 8/15) With the exception of the handwheel handles, the lathe is shipped fully assembled. Use a flat head screwdriver to attach the handwheel handles shown in Figure 18. Assembly Figure 18. Handwheel handles installed. Carriage Handle Cross Slide Handle Figure 17. G...
Page 29 - Test Run
Model G0768/G0769 (Mfd. Since 8/15) -27- Test Run Once assembly is complete, test run the machine to ensure it is properly connected to power and safety components are functioning properly. If you find an unusual problem during the test run, immediately stop the machine, disconnect it from power, an...
Page 31 - Lathe Spindle Break-In
Model G0768/G0769 (Mfd. Since 8/15) -29- Lathe Spindle Break-In 1. Successfully complete Test Run procedure beginning on Page 27. 2. Reset Emergency Stop button. G0769 Only: Set lathe/mill selector switch to "1" for lathe mode. 3. Press green ON button. 4. Rotate spindle speed dial until spi...
Page 32 - Recommended
-30- Model G0768/G0769 (Mfd. Since 8/15) The following adjustments have been made at the factory. However, because of the many variables involved with shipping, we recommend you verify these adjustments to ensure the best results: Factory adjustments that should be verified: • Tailstock alignment .....
Page 33 - SECTION 4: LATHE OPERATIONS; Operation Overview
Model G0768/G0769 (Mfd. Since 8/15) -31- SECTION 4: LATHE OPERATIONS Operation Overview To complete a typical lathe operation, the operator does the following: 1. Securely mounts workpiece in lathe. 2. Puts on safety glasses and a face shield, rolls up sleeves, removes jewelry, and secures any cloth...
Page 34 - Chuck Installation
-32- Model G0768/G0769 (Mfd. Since 8/15) Chuck & Faceplate Mounting This lathe ships with the 3-jaw chuck installed. This is a scroll-type chuck where all three jaws move in unison when the chuck key is used. The included 4-jaw chuck features independent jaws, which are used for square or uneven...
Page 36 - Changing Jaw Set
-34- Model G0768/G0769 (Mfd. Since 8/15) Changing Jaw Set The 3-jaw scroll chuck included with the lathe features inside and outside hardened steel jaw sets (see Figure below), which move in unison to center a concentric workpiece. When installing the jaws, it is important to make sure they are inst...
Page 37 - Mounting Workpiece
Model G0768/G0769 (Mfd. Since 8/15) -35- Figure 31. 4-jaw chuck tightening sequence. 1 2 3 4 Workpiece Center Point Figure 32. Example of a non-cylindrical workpiece correctly positioned on a 4-jaw chuck. 4-Jaw Chuck Refer to the Chuck Installation subsection for instructions on installing the 4-jaw...
Page 38 - Faceplate
-36- Model G0768/G0769 (Mfd. Since 8/15) Figure 33. Example of a workpiece clamped in a faceplate. Faceplate Non-Cylindrical Workpiece Clamp To mount non-concentric workpiece to face- plate: 1. DISCONNECT MACHINE FROM POWER! 2. Use appropriate device to protect ways (refer to Chuck Safety & Supp...
Page 39 - Tailstock Quill Specs
Model G0768/G0769 (Mfd. Since 8/15) -37- Tailstock The tailstock is typically used to support long workpieces at the side opposite the spindle, using a live or dead center. It can also hold a tapered drill bit (or a drill chuck with a regular drill bit) for boring holes. Unlike boring done with a dr...
Page 41 - Aligning Tailstock to Spindle
Model G0768/G0769 (Mfd. Since 8/15) -39- Turn CCW Turn CCW Turn CW Turn CW Figure 38. Example of set screw adjustment in relation to tailstock movement. 3. Tighten tailstock lock to secure the offset. To offset tailstock: 1. Loosen tailstock lock to release clamping pressure on top and bottom castin...
Page 43 - Centers; Mounting Dead Center in Spindle; Dead Centers; Removing Center from Spindle
Model G0768/G0769 (Mfd. Since 8/15) -41- Figure 43 shows the MT#2 and MT#3 dead cen-ters included with the lathe. Centers Mounting Dead Center in Spindle 1. DISCONNECT MACHINE FROM POWER! 2. Thoroughly clean and dry all mating surfaces of spindle bore and center, making sure that no lint or oil rema...
Page 44 - Mounting Workpiece Between
-42- Model G0768/G0769 (Mfd. Since 8/15) Mounting Center in Tailstock To mount center in tailstock: 1. DISCONNECT MACHINE FROM POWER! 2. Thoroughly clean and dry tapered mating surfaces of tailstock quill bore and center, making sure no lint or oil remains on tapers. Removing Center from Tailstock N...
Page 46 - Compound Rest; Installing Tool
-44- Model G0768/G0769 (Mfd. Since 8/15) 2. Rotate rest to desired angle, as indicated by scale at base, then retighten cap screws. Tip: The first time you set the compound rest angle for cutting threads, mark the location on the cross slide as a quick reference point. This will allow you to quickly...
Page 48 - Carriage Handwheel; Manual Feed; Cross Slide Handwheel
-46- Model G0768/G0769 (Mfd. Since 8/15) The cutting tool can be manually fed into the workpiece using the carriage, cross slide, and compound rest handwheels shown below. Carriage Handwheel Graduated DialIncrements ................................... 0.01" (0.25mm)One Full Revolution .............
Page 49 - Setting Spindle Direction & Speed; Spindle Speed; Determining Spindle Speed
Model G0768/G0769 (Mfd. Since 8/15) -47- Setting Spindle Direction & Speed Set the spindle rotation direction to forward or reverse with the spindle direction switch, shown in Figure 56. Reset the Emergency Stop button, press the ON button, select "1" on the lathe/mill selector (Model G0...
Page 50 - Configuration Example
-48- Model G0768/G0769 (Mfd. Since 8/15) Tensioner Screw Figure 57. Location of tensioner screw used for tightening/loosening V-belts when changing belt positions. Configuration Example Follow this example to gain a better understand-ing of how to set the lathe spindle speed. To set spindle speed to...
Page 51 - mm; Feed & Thread Charts Label
Model G0768/G0769 (Mfd. Since 8/15) -49- Thread Charts—Display headstock end gear positions used for cutting various metric or inch threads (see Figure 61). Understanding Gear Charts This subsection explains how to understand the feed and thread charts on the headstock. If you do not understand lath...
Page 52 - How to Read the Feed Chart
-50- Model G0768/G0769 (Mfd. Since 8/15) Figure 62 identifies the three available feed rates and the feed icon at the top of the feed rate chart. How to Read the Feed Chart 0.0071" 0.0037" 8420 A A 40 in/ C C D D B B E E F F 80 80 80 30 72 33 80 30 0.0068" Figure 62. Chart displays the t...
Page 53 - How to Read the Thread Charts
Model G0768/G0769 (Mfd. Since 8/15) -51- Because there is only one spacer, on some setups smaller gears must be used as spac- ers on the adjustable gears. Both positions must be filled for the gears to work properly. This also applies to the "blank" areas on the chart, such as the one left o...
Page 54 - End Gears; Power Feed Configuration
-52- Model G0768/G0769 (Mfd. Since 6/14) Primary Threading Configuration This threading configuration is used for inch and metric threading. Mesh the A and C, and D and F gears, as shown in Figure 72. The A/B and C/D change gears each share a keyed bushing. A spacer (E) is installed on the lower sha...
Page 55 - Configuring End Gears
Model G0768/G0769 (Mfd. Since 6/14) -53- Configuring End Gears Follow the example below to understand how to change the gears from the factory set power feed configuration to the primary inch threading configuration. Concepts are similar to those for setting up gears for power feeding. Note: Many of...
Page 58 - Power Feed; Power Feed Controls
-56- Model G0768/G0769 (Mfd. Since 8/15) Power Feed The carriage has power feed (or automatic feed) options for threading or non-threading operations. This section describes how to use the power feed option for non-threading operations. To learn how to power the carriage for threading operations, re...
Page 59 - Setting Power Feed Rate
Model G0768/G0769 (Mfd. Since 8/15) -57- To avoid potential carriage/chuck crash, disengage half nut lever immediately after completing power feed operations. D. Half Nut Lever: Engages/disengages half nut for power feed operations. Figure 90. Half nut lever. D 3. Gather the required A–F change gear...
Page 60 - Headstock Threading Controls; Threading
-58- Model G0768/G0769 (Mfd. Since 8/15) The following subsections describe how to use the threading controls and charts to set up the lathe for a threading operation. If you are unfamil-iar with how to cut threads on a lathe, we strongly recommend that you read books, review industry trade magazine...
Page 61 - Thread Dial Chart; Apron Threading Controls
Model G0768/G0769 (Mfd. Since 8/15) -59- Thread Dial Chart INDICATOR TABLE 9 1-81-81-81-8 1, 4, 7 1218 24 All Others TPI SCALE Figure 97. Thread dial chart. The thread dial chart is located on the headstock, as shown in Figure 96. Find the TPI (threads per inch) that you want to cut on the thread di...
Page 62 - SECTION 5: MILL OPERATIONS
-60- Model G0768/G0769 (Mfd. Since 8/15) SECTION 5: MILL OPERATIONS To complete a typical milling operation, the operator does the following: 1. Puts on personal protective equipment. 2. Securely clamps workpiece to cross slide table. 3. With machine disconnected from power, installs correct tooling...
Page 63 - Re-installing Compound Rest; Removing Compound Rest
Model G0768/G0769 (Mfd. Since 8/15) -61- Removing Compound Rest The compound rest and tool post must be removed before milling/drilling so the cross slide table can be used as the milling table. Re-installing Compound Rest Align compound rest with swivel base mounting holes and nut (see Figure 101),...
Page 64 - Tilting Headstock; Raising/Lowering Headstock
-62- Model G0768/G0769 (Mfd. Since 8/15) Headstock Movement The milling headstock moves in the following ways: • Travels up and down the column (Z-axis). • Tilts 45° left or right relative to the table. Tilting Headstock Tools Needed Qty Wrench 16mm .....................................................
Page 65 - Table Travel
Model G0768/G0769 (Mfd. Since 8/15) -63- Table Travel The cross slide table travels in two directions, as illustrated in Figure 105: • X-axis (longitudinal) • Y-axis (cross) X-Axis or Longitudinal Travel (Left & Right) Y-Axis orCross Travel(In & Out) Figure 105. Possible directions of cross ...
Page 66 - Coarse Downfeed
-64- Model G0768/G0769 (Mfd. Since 8/15) The Model G0769 features two different types of spindle downfeed controls: coarse and fine, as shown in Figure 107. Using Spindle Downfeed Controls Coarse Downfeed Coarse downfeed is typically used for drilling applications. Rotate either of the coarse downfe...
Page 67 - Installing Tooling
Model G0768/G0769 (Mfd. Since 8/15) -65- Installing /Removing Tooling Cutting tools are sharp and can easily cause cutting injuries. Always protect your hands with leather gloves or shop rags when handling cutting tools. The Model G0769 includes a 1 ⁄ 2 " drill chuck with MT#2 arbor (see Figure ...
Page 68 - Removing Tooling
-66- Model G0768/G0769 (Mfd. Since 8/15) Removing Tooling Tools Needed Qty Wrench 8mm ..................................................... 1Wrench 17mm.................................................... 1Wrench 25mm ................................................... 1Brass Hammer ...................
Page 70 - SECTION 6: ACCESSORIES; order online at
-68- Model G0768/G0769 (Mfd. Since 8/15) SECTION 6: ACCESSORIES ACCESSORIES order online at www.grizzly.com or call 1-800-523-4777 Installing unapproved accessories may cause machine to malfunction, resulting in serious personal injury or machine damage. To reduce this risk, only install accessories...
Page 73 - SECTION 7: MAINTENANCE; Schedule
Model G0768/G0769 (Mfd. Since 8/15) -71- SECTION 7: MAINTENANCE Schedule Ongoing To maintain a low risk of injury and proper machine operation, if you ever observe any of the items below, shut down the machine immediately and fix the problem before continuing operations: • Loose mounting bolts or fa...
Page 74 - Lubrication; Lubrication Frequency
-72- Model G0768/G0769 (Mfd. Since 8/15) Lubrication NOTICE The recommended lubrication is based on light-to-medium usage. Since lubrication helps to protect value and operation of machine, these lubrication tasks may need to be performed more frequently than rec- ommended, depending on usage. Failu...
Page 77 - Quill Rack
Model G0768/G0769 (Mfd. Since 8/15) -75- Column Ways (G0769) Lube Type .. Model SB1365 or ISO 68 EquivalentLube Amount ........................................Thin CoatLubrication Frequency ................................. Daily Regular lubrication will ensure your milling head-stock performs at it...
Page 79 - Machine Storage; Preparing Machine for Storage; Bringing Machine Out of Storage
Model G0768/G0769 (Mfd. Since 8/15) -77- Machine Storage Preparing Machine for Storage 1. DISCONNECT MACHINE FROM POWER! 2. Thoroughly clean all unpainted, bare metal surfaces, then apply a liberal coat of way oil, heavy grease, or rust preventative. Take care to ensure these surfaces are completely...
Page 80 - Troubleshooting
-78- Model G0768/G0769 (Mfd. Since 8/15) Review the troubleshooting and procedures in this section if a problem develops with your machine. If you need replacement parts or additional help with a procedure, call our Technical Support. Note: Please gather the serial number and manufacture date of you...
Page 81 - Lathe Operation
Model G0768/G0769 (Mfd. Since 8/15) -79- Lathe Operation Symptom Possible Cause Possible Solution Bad surface finish. 1. Wrong spindle speed or feed rate.2. Dull tooling or poor tool selection. 3. Tool height not at spindle centerline. 4. Too much play in gibs. 1. Adjust for appropriate spindle spee...
Page 82 - Mill Operation
-80- Model G0768/G0769 (Mfd. Since 8/15) Mill Operation Symptom Possible Cause Possible Solution Tool slips in spindle. 1. Tool is not fully drawn up into spindle taper. 2. Debris on tool or in spindle taper.3. Taking too big of cut. 1. Tighten drawbar (Do not overtighten).2. Clean collet and spindl...
Page 84 - Adjusting Backlash; Cross Slide; Adjusting Leadscrew
-82- Model G0768/G0769 (Mfd. Since 8/15) Adjusting Backlash Backlash is the amount of free play felt while changing rotation directions with the handwheel. This can be adjusted on the cross slide leadscrew. Before beginning any adjustment, make sure all associated components are cleaned and lubri-ca...
Page 85 - Adjusting Gibs; Adjusting Cross Slide and Compound
Model G0768/G0769 (Mfd. Since 8/15) -83- Adjusting Gibs The goal of adjusting the gib screws is to remove sloppiness or "play" from the ways without over-adjusting them to the point where they become stiff and difficult to move. In general, loose gibs cause poor finishes and tool chatter; ho...
Page 86 - Adjusting Z-Axis Way Gib; Adjusting Half Nut
-84- Model G0768/G0769 (Mfd. Since 8/15) Loosen one gib adjustment screw (see Figure 145) and tighten the opposing screw the same amount to move the gib, while at the same time using the handwheel to move the headstock until you feel a slight drag in the path of movement. Adjusting Z-Axis Way Gib Fi...
Page 88 - Replacing Brushes; Replacing Lathe Motor Brushes
-86- Model G0768/G0769 (Mfd. Since 8/15) Replacing Brushes This machine is equipped with one (G0768) or two (G0769) universal motors that use carbon brushes to transmit electrical current inside the motor. These brushes are considered to be regular "wear items" or "consumables" that ...
Page 90 - Wiring Safety Instructions
SHOCK HAZARD. Working on wiring that is con-nected to a power source is extremely dangerous. Touching electrified parts will result in personal injury including but not limited to severe burns, electrocution, or death. Disconnect the power from the machine before servicing electrical com-ponents! MO...
Page 98 - Carriage Components & Accessories
Carriage Components & Accessories 101 102 103 104 105 106 107 108 109 109 110 111 112 113 114 115 116 117 117 118 119 120 123 123 124 126 180 126 127 127 128 129 130 131 131 132 133 134 134 135 136 155 141 142 144 145 146 147 149 151 152 154 150 138 156 157 158 159 160 161 162 163 164 165 166 17...
Page 101 - Apron
Apron REF PART # DESCRIPTION REF PART # DESCRIPTION 202 P0768202 LOCK NUT M8-1.25 220 P0768220 SUPPORT BAR 203 P0768203 CARRIAGE HANDWHEEL (G0768) 221 P0768221 SET SCREW M6-1 X 8 203 P0769203 CARRIAGE HANDWHEEL (G0769) 222 P0768222 COMPRESSION SPRING 0.6 X 3.5 X 12 204 P0768204 CURVED PLATE 223 P076...
Page 102 - Gearbox
Gearbox REF PART # DESCRIPTION REF PART # DESCRIPTION 301 P0768301 DIRECTION INDICATOR PLATE 322 P0768322 SHAFT (G0768) 302 P0768302 SET SCREW M6-1 X 10 322 G0769322 SHAFT (G0769) 303 P0768303 COMPRESSION SPRING 0.8 X 4 X 16 323 P0768323 SET SCREW M4-.7 X 8 304 P0768304 STEEL BALL 5MM 324 P0768324 C...
Page 110 - G0768 Electrical Component Diagram
G0768 Electrical Component Diagram Inside Electrical Compartment Top Panel 902 903 905 906 908 909 910 904 Rear Panel * 912 907 * Front Panel 911 -108- Model G0768/G0769 (Mfd. Since 8/15) REF PART # DESCRIPTION REF PART # DESCRIPTION 902 P0768902 E-STOP KEDU JD17B 120V 908 P0768908 SPEED CONTROL CIR...
Page 111 - G0769 Electrical Component Diagram
G0769 Electrical Component Diagram Inside Electrical Compartment * Top Panel 901 902 903 905 912 906 908 911 909 910 904 Rear Panel * 912 907 * 910 Front Panel 911 REF PART # DESCRIPTION REF PART # DESCRIPTION 901 P0769901 ROTARY SWITCH LW8-10/6 907 P0769907 FUSE HOLDER MF528 15A 250V 902 P0769902 E...
Page 113 - WARRANTY CARD
C U T A LO N G D O T T E D LI N E Name _____________________________________________________________________________ Street _____________________________________________________________________________City _______________________ State _________________________ Zip _____________________Phone # _____...
