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Grizzly G9730 Owner's Manual

13" x 40" high precision toolroom lathe
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Model G9730/G9731
***IMPORTANT UPDATE***
Applies to Models Mfg. Since 5/11
and Owner's Manual Printed 1/11
We recently made the following changes to the G9730/G9731 Toolroom Lathe:
Keep this update for future reference!
If you have any further questions about this manual update or the changes made to the machine, contact
our Technical Support at (570) 546-9663 or email techsupport@grizzly.com.
WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE
OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.

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Summary of Contents for Grizzly G9730

  • Page 1 If you have any further questions about this manual update or the changes made to the machine, contact our Technical Support at (570) 546-9663 or email techsupport@grizzly.com. WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.
  • Page 2 G9730 Control Panel Wiring...
  • Page 3 G9730 Component Wiring Spindle Motor Spindle Direction Switch Control Panel Coolant Pump Motor Master Power Switch Junction 220V L6-30 Plug (As Recommended)
  • Page 4 G9731 Control Panel Wiring...
  • Page 5 G9731 Component Wiring Spindle Motor Spindle Direction Switch Control Panel Coolant Pump Motor Junction Master Power Switch 220V 15-15 Plug (As Recommended)
  • Page 6 ® Buy Direct and Save with Grizzly – Trusted, Proven and a Great Value! ~Since 1983~ Visit Our Website Today For Current Specials! ORDER 24 HOURS A DAY! 1-800-523-4777...
  • Page 7 MODEL G9730/G9731 13" X 40" HIGH PRECISION TOOLROOM LATHE 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.
  • Page 8 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.

  • Page 9: Table Of Contents

    Table of Contents INTRODUCTION ..........3 SECTION 1: SAFETY ........9 SECTION 2: POWER SUPPLY ...... 12 SECTION 3: SETUP ........15 SECTION 4: OPERATIONS ......27...
  • Page 10 SECTION 5: ACCESSORIES ......61 SECTION 8: WIRING & ELECTRICAL ..92 SECTION 6: MAINTENANCE ......63 SECTION 9: PARTS ........99 SECTION 7: SERVICE ........75 WARRANTY AND RETURNS ...... 121...

  • Page 11: Introduction

    INTRODUCTION Manual Accuracy Contact Info your machine may not exactly match the manual Machine Description www.grizzly.com...
  • Page 12 Identification Figure 1. Headstock Controls Tailstock Controls Page 28 Page 30 Carriage Controls & Components Page 29 To reduce the risk of serious injury when using this machine, read and understand this entire manual before beginning any operations.
  • Page 13 G9730 Machine Data Sheet Customer Service #: (570) 546-9663 · To Order Call: (800) 523-4777 · Fax #: (800) 438-5901 Product Dimensions: Weight................................1475 lbs. Width (side-to-side) x Depth (front-to-back) x Height..............70 x 23-1/2 x 50 in. Footprint (Length x Width)..........................71 x 22 in. Shipping Dimensions: Type..............................
  • Page 14 Headstock Info Spindle Bore............................1-3/8 in. Spindle Taper............................MT#4.5 No Of Spindle Speeds............................8 Spindle Speeds............... 105, 175, 260, 395, 610, 915, 1320, 2000 RPM Spindle Type..........................D1-4 Cam Lock Spindle Bearings........................Tapered Roller Spindle Length............................. 16-1/4 in. Spindle Length with 3-Jaw Chuck....................... 21-3/4 in. Spindle Length with 4-Jaw Chuck.......................
  • Page 15 G9731 Machine Data Sheet Customer Service #: (570) 546-9663 · To Order Call: (800) 523-4777 · Fax #: (800) 438-5901 Product Dimensions: Weight................................1475 lbs. Width (side-to-side) x Depth (front-to-back) x Height..............70 x 23-1/2 x 50 in. Footprint (Length x Width)..........................71 x 22 in. Shipping Dimensions: Type................................
  • Page 16 Headstock Info Spindle Bore............................1-3/8 in. Spindle Taper............................MT#4.5 No Of Spindle Speeds............................8 Spindle Speeds............... 105, 175, 260, 395, 610, 915, 1320, 2000 RPM Spindle Type..........................D1-4 Cam Lock Spindle Bearings........................Tapered Roller Spindle Length............................. 16-1/4 in. Spindle Length with 3-Jaw Chuck....................... 21-3/4 in. Spindle Length with 4-Jaw Chuck.......................

  • Page 17: Section 1: Safety

    SECTION 1: SAFETY 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.
  • Page 18 DISCONNECTING POWER SUPPLY. FORCING MACHINERY. GUARDS & COVERS. APPROVED OPERATION. NEVER STAND ON MACHINE. STABLE MACHINE. DANGEROUS ENVIRONMENTS. AWKWARD POSITIONS. ONLY USE AS INTENDED. USE RECOMMENDED ACCESSORIES. UNATTENDED OPERATION. CHILDREN & BYSTANDERS. MAINTAIN WITH CARE. REMOVE ADJUSTING TOOLS. CHECK DAMAGED PARTS. SECURING WORKPIECE.
  • Page 19 Additional Safety for Lathes CLEARING CHIPS. SPEED RATES. CHUCK KEY SAFETY. STOPPING SPINDLE BY HAND. TOOL SELECTION. CRASHES. SECURING WORKPIECE. LONG STOCK SAFETY. CHUCKS. CUTTING FLUID SAFETY. SAFE CLEARANCES.

  • Page 20: Section 2: Power Supply

    SECTION 2: POWER SUPPLY Availability Circuit Information For your own safety and protection of Electrocution, fire, property, consult a qualified electrician if equipment damage may you are unsure about wiring practices or occur if machine is not electrical codes in your area. correctly grounded and connected to the power Note: The circuit requirements listed in this man-...

  • Page 21: Figure

    Grounding Instructions L6-30 GROUNDED Model LOCKING Extension Cords G9730 RECEPTACLE L6-30 LOCKING PLUG Figure 2. Model G9731 GROUNDED 15-15 RECEPTACLE G9730 Minimum Gauge Size ....10 AWG G9731 Minimum Gauge Size ....14 AWG 15-15 PLUG Maximum Length (Shorter is Better)..50 ft. Figure 3.

  • Page 22: Figure

    Correcting Phase Polarity (G9731) To correct wiring that is out of phase: Figure 4. Figure 4...

  • Page 23: Section 3: Setup

    SECTION 3: SETUP Needed for Setup 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! Wear safety glasses dur- ing the entire setup pro- cess! Page 17 This machine and its com-...

  • Page 24: Figure

    Inventory Inventory (Figures 5–7) Figure 5. Figure 6. NOTICE If you cannot find an item on this list, check the mounting location on the machine or the packaging materials. Sometimes parts are pre-installed for shipping, or they become Figure 7. hidden by packaging materials.

  • Page 25: Figure

    Cleanup Gasoline or products with low flash points can explode or cause fire if used to clean machin- ery. Avoid cleaning with these products. Many cleaning solvents are toxic if concentrat- ed amounts are inhaled. Only work in a well-venti- lated area.

  • Page 26: Site Considerations

    Site Considerations Weight Load Physical Environment Machine Data Sheet Space Allocation Electrical Installation See below for required space allocation. Lighting Children or untrained people may be seriously injured by this machine. Only install in an access restricted location. Figure 9.
  • Page 27 Lifting & Placing Figure 10 The Model G9730/G9731 is a heavy machine. Serious personal injury may occur if safe moving methods are not used. To be safe, get assistance and use power equipment to move the shipping crate and remove the machine from the crate.
  • Page 28 Figure 14 Figure 12 Figure 14. Figure 12. Chain & Safety Hook: Figure 12 Figure 15 Lifting Straps: Figure 13 Figure 15. Figure 13.
  • Page 29 Chain & Safety Hook Figure 16 Mounting Cast Iron Foot Pads Figure 17 Bolting to Concrete Floors Figure 16 NOTICE As the lathe is used, the cast iron parts may shift slightly. Re-check the bedway to make sure it remains level after the first 24 Figure 17.

  • Page 30: Lubricating Lathe

    Assembly Lubrication Page 64 Figure 18 Note: If your lathe was shipped with oil in the reservoirs, do not change that oil until after the break-in procedure. Adding Cutting & Brake Fluids Test Run Figure 18. Lubricating Lathe Cutting Fluid System Page 69 Brake Fluid GEARBOXES MUST...

  • Page 31: Power Connection

    Power Connection Test Run POWER SUPPLY The test run consists of verifying the follow- ing: Connecting to Power Disconnecting Power Troubleshooting Page 75 Before starting the lathe, make sure you have performed the preceding assembly and adjustment instructions, and you have read through the rest of the manual and are familiar with the various functions and safety features on this machine.
  • Page 32 Figure 19 Figure 21 Note: It may be necessary to rock the chuck back-and-forth by hand when moving the controls to enable the gears to mesh. Figure 19. Chuck & Faceplate Mounting Page 31 Figure Figure 21. Figure 22 Figure 20. Figure 22.
  • Page 33 Figure 21 14. For the Model G9731 Only: Note: After using the foot brake to stop the lathe, it is necessary to move the spindle ON/OFF lever to the OFF position before attempting to re-start spindle rotation. Phase Polarity Page Steps Spindle Break-In Recommended...

  • Page 34: Recommended Adjustments

    Spindle Break-In Step 4 To perform the spindle break-in: Test Run Page 23 Change the oil in the headstock, quick change gearbox, and apron reservoirs as instructed in Lubrication beginning on Page 64. This will flush away any metal particles that may have accumulated from the manufacturing process or the spindle Figure 23 break-in.

  • Page 35: Section 4: Operations

    WE STRONGLY REC- OMMEND that you read books, review industry trade magazines, or get formal training before beginning any projects. Regardless of the content in this section, Grizzly Industrial will not be held liable for accidents caused by lack of training.
  • Page 36 A. Spindle Speed Range Lever: Controls & Components B. Spindle Speed Knob: Figures 24–30 C. Headstock Feed Direction Knob: Master Power Switch: D. Quick Change Knob A–C Dial Indicator Stud (Model G9730 Only): Control Panel Figure 26. E. Cutting Fluid Switch: Power Light: Figure 24.

  • Page 37: Carriage Controls

    G. Emergency STOP Button: Carriage Controls H. Jog Button: Quick Change Controls Figure 28. O. 4-Way Tool Post: Figure 27. Quick Change Knob 1–4: P. Cutting Fluid Nozzle and Valve: Quick Change Knob D–E: Q. Compound Rest Handwheel: K. Metric Thread Chart: Inch Thread Chart: R.

  • Page 38: Tailstock Controls

    X. Carriage Handwheel: AD. Quill: AE. Quill Lock Lever Rest: Y. Cross Slide Handwheel: AF. Offset Adjustment Screw: 4-Position Carriage Stop: AG. Tailstock Lock Lever Rest: AH. Casting Clamp Screw: Tailstock Controls AI. Offset Scale: AJ. Locking Set Screw: Foot Brake Figure 30 Figure 29.
  • Page 39 Chuck & Faceplate Mounting Figure 32 Figure 32. Step 3 Tools Needed Note: The camlocks will slightly rise up from the spindle body as they are rotated. Removing Chuck or Faceplate Step 3 Figure 33 Figure 31 Figure 33. Figure 31.
  • Page 40 Installing & Adjusting Camlock Studs Step 4 Tip: When the camlock studs are correctly installed and adjusted, and the chuck or faceplate mounts evenly onto the spindle, make opposing and unique matching registration marks on the sides of the spindle and chuck/faceplate. Align these registration marks when you next mount the chuck or faceplate to ensure that the correct spindle mounting hole is used by each stud.
  • Page 41 Figure 35 Figure 36 Figure 38 To Correct: Figure 36. Figure 38. Figure 37 Figure 39 To Correct: Figure 39. Figure 37. Mounting Chuck or Faceplate Page 34...

  • Page 42: Mounting Chuck Or Faceplate

    Mounting Chuck or Faceplate Note: If the chuck or faceplate has a regis- tration mark that matches one on the spindle nose, align these marks when performing the next step. Figure 31 Figure 41 Installing & Adjusting Camlock Studs Page 32 NOTICE Never install a chuck or faceplate without having the stud locking cap screws in...

  • Page 43: Jaw Chuck

    3-Jaw Chuck Step 7 Figure 42 Mounting Chuck or Faceplate Page Figure 43 Figure 42. Step 7 Note: If any of the cam lines do not fall between the "V" marks when the camlock is tight, you must adjust that camlock stud as instructed in Installing &...

  • Page 44: Mounting Workpiece

    Steps 6–7 Note: The jaws are numbered from 1–3 and are designed to be installed in this order so that they will hold the concentric workpiece evenly. Securely mount workpiece and remove Figure 44 the chuck key before connecting the lathe to power! Objects thrown from the lathe could cause death or serious personal...
  • Page 45 Because of the dynamic forces involved in machining a non-concentric or off-center Figure 45 workpiece, always use a low spindle speed to prevent the workpiece breaking loose and being thrown from the lathe, which could lead to death or serious personal injury. 4-Jaw Chuck Mounting Chuck or Faceplate Page...
  • Page 46 Figure 46 Figure 47 Figure 46. Figure 47.
  • Page 47 Faceplate Mounting Chuck or Faceplate Page Figure 48. Failure to properly secure a workpiece to the Centers faceplate could cause the workpiece to be thrown from the lathe with deadly force at the operator or bystanders. Use a minimum of THREE independent clamping devices to Figure 49 hold the workpiece, clamp counter-weights to the faceplate to balance it, and always use...
  • Page 48 Dead Centers Figure 50. Live Centers Note: The 7" drive plate included with this lathe is specifically designed for use with a dead center and lathe dog. Mounting Dead Center in Spindle Removing Center From Spindle Note: This will prevent the tapered surfaces seizing from operational pressures, which could make it very difficult to remove the cen- ter.
  • Page 49 Mounting Center in Tailstock Removing Center From Tailstock Figure 51 Mounting Workpiece Between Centers Figure 51. To mount a center in the tailstock: Figure 52 Note: Keep in mind that extending the quill more than 2" will reduce stability and accu- racy Figure 52.
  • Page 50 Installing Tooling Tailstock Figure 53 Figures 54–55 Figure 53. Positioning Tailstock Figure 54. Using Quill To use the quill: Figure 55.

  • Page 51: Removing Tooling

    Removing Tooling Figure 53 Figure 56 To install tailstock tooling: Figure 56. Note: This will prevent the tapered surfaces Offsetting Tailstock seizing under operational pressures, which could make it very difficult to remove the tool. Figure 57 Note: The marks on the offset indicator are arbi- trary.
  • Page 52 Tool Needed Aligning To Spindle Centerline To offset the tailstock: Figure 58 Items Needed To align the tailstock to the spindle center- line: Mounting Page 21 Figure 58. Step 5 Figure 58 Figure 59 Note: As long as this dead center remains in the chuck, the point of the center will remain true to the spindle centerline.
  • Page 53 Step 2 Figure 60 Figure 61. thinner away Figure 62 Figure 60. Note: If necessary in the following step, refer to Offsetting Tailstock on Page 43 for detailed instructions. thicker Figure 62. toward Figure 61 Steps 6–8...

  • Page 54: Steady Rest

    Steady Rest To install and use the steady rest: Figure 64. Figure 63 Follow Rest Figure 65 Note: To reduce the effects of friction, lubricate the brass finger tips with an anti-seize oil during operation. Figure 63. Figure 63 Figure 64 Figure 65.

  • Page 55: Compound Rest

    Tools Needed Carriage & Slide Locks To set the compound rest at a certain angle: Figure 67 Figure 66 Figure 67. Figure 66. Tip: If setting up to cut external right-hand inch or metric threads, or internal left-hand threads for the first time, set the compound Compound Rest rest so its travel is perfectly parallel with the cross slide.
  • Page 56 Four-Way Tool Post Aligning Cutting Tool with Spindle Centerline Figure 69 Installing Tool Tool Needed To load the tool post: Figure 68 Figure 69. Figure 68. Aligning Tailstock To Spindle Centerline Page 44 Over-extending a cutting tool from the tool post will increase the risk of it breaking dur- ing operation, which may cause metal pieces to be thrown with great force at the operator...
  • Page 57 Items Needed 4-Position & Micrometer Carriage Stops To align the cutting tool with the tailstock center: Figure 71 Figure 70 (Top View) Figure 71. (Side View) Figure 70.

  • Page 58: Manual Feed

    Manual Feed NOTICE When the carriage is engaged with the leadscrew during threading operations, these stops WILL NOT stop carriage move- ment—you MUST use the halfnut lever Figure 72 instead. Otherwise, the carriage can crash into the chuck or the leadscrew shear pin can break.

  • Page 59: Spindle Speed

    Setting Spindle Speed Spindle Speed Figure 74 Determining Spindle Speed Figure 73 Figure 74. Figure 73. Machinery's Handbook Machine Shop Practice...
  • Page 60 NOTICE If the spindle is rotating when attempting to change the spindle speed, the headstock gears will suffer damage! ALWAYS make sure the spindle is completely stopped BEFORE using the headstock controls to Example 1: Spindle Speed of 175 RPM make changes.

  • Page 61: Power Feed Controls

    Power Feed Controls Power Feed Figures 77–78 Important: Before engaging power feed, make sure the carriage and slide locks are loose to pre- vent damage to these components. Note: Before using power feed, you may have to re-configure the change gears, depending on how they are set up.
  • Page 62 C. Quick Change Knob 1–4: Setting Non-Threading Feed Rate D. Quick Change Knob D–E: E. Feed Selection Knob: Feed Rate Chart: Example: Power Feed Rate of 0.0046 in/rev Figure 79 Change Gears Figure 78. G. Carriage Lock: Figure 79. H. Feed Control Knob: Feed ON/OFF Knob: NOTICE Keep in mind that if spindle rotation is...

  • Page 63: Change Gears

    Change Gears Figure 80 Tools Needed To exchange change gears: Figure 81 E D E .0046 Figure 80. Figure 81. Note: When rotating these knobs, you may need to rock the chuck/faceplate back-and- forth by hand. If necessary, insert the chuck key for better leverage.

  • Page 64: Setting Threading Controls

    Note: In the following step, take care to keep Threading the shaft keys in place during the change gear exchanges. Setting Threading Controls Note: The top change gear engages the larg- er 127 tooth middle gear for all applications. However, the bottom change gear engages the 127 tooth middle gear for all applications except metric threading operations.
  • Page 65 Halfnut Lever Figure 84 Note: Keep in mind the spindle must be completely stopped before using the quick Figure 85 change knob A–C on the headstock. Figure 85. NOTICE Even though there is a lock-out device in the apron to prevent the feed control knob and the halfnut lever from being engaged Figure 84.

  • Page 66: Thread Dial

    Thread Dial Thread Indicator Table Figure 87 Figure 86 Figure 87. T.P.I. SCALE Figure 88 Figure 86. NOTICE When threading, we recommend you use the slowest speed possible and make multi- ple light cuts. This will give you better con- trol of when to engage/disengage the half- nut and prevent damaging the workpiece or lathe.
  • Page 67 Even Numbered TPI Not Divisible by 4 or 8: TPI Divisible by 8: Figure 92 Figure 89 T.P.I. SCALE T.P.I. SCALE 1–8 Figure 92. Figure 89. NOTICE TIP Divisible by 4 & Not by 8: The exceptions to the above threading rules are 36 and 46 TPI.

  • Page 68: Cutting Fluid System

    Cutting Fluid System BIOLOGICAL & POISON HAZARD! Use the correct person- al protection equipment when handling cutting fluid. Follow federal, state, and fluid manu- facturer requirements Figure 93 for proper disposal. NOTICE Running the cutting fluid pump without adequate fluid in the reservoir may perma- nently damage it, which will not be covered under warranty.

  • Page 69: Section 5: Accessories

    To minimize this risk, only install accessories recommended for this machine by Grizzly. NOTICE Refer to the newest copy of the Grizzly Catalog for other accessories available for this machine. Figure 95. H8257—Primrose Armor Plate with Moly-D ®...
  • Page 70 G1070—MT3 Live Center Set G9610—Test Indicator " " G9611—Test Indicator G9612—Test Indicator Figure 97. G0688—Tool Post Grinder Figure 99. G7978—Rotary Phase Converter Figure 98. Figure 100.

  • Page 71: Section 6: Maintenance

    SECTION 6: MAINTENANCE Daily, After Operations Always disconnect power to the machine before performing maintenance. Failure to do this may result in serious person- al injury. Monthly Schedule Page 69 Semi-Annually Ongoing Pages 64–65 Page 68 Annually Page 66 Page 21 Every 2 Years Page 71 Cleaning/Protecting...
  • Page 72 Adding Oil Lubrication Figure 102 NOTICE The following recommended lubrication schedules are based on light-to-medium usage. Keeping in mind that lubrication helps to protect the value and operation of the lathe, these lubrication tasks may need to be performed more frequently than rec- ommended here, depending on usage.
  • Page 73 Adding Oil Figure 104 Quick Change Gearbox Checking Oil Level Figure 104. Figure 103 Changing Oil Items Needed To change the quick change gearbox oil: Figure 103. Figure 104...
  • Page 74 Adding Oil Figure 103 Figure 106 Apron Figure 106. Changing Oil Items Needed Checking Oil Level Figure 105 To change the apron oil: Figure 105 Figure 105.
  • Page 75 Bedways Figures 108–110 Page 61 Figure 107 Figure 108. Figure 107. Ball Oilers Figure 109.
  • Page 76 Change Gears Figure 112 Figure 110. Leadscrew & Feedrod Figure 112. Figure 111 Figure 111.
  • Page 77 Hazards Cutting Fluid System Service Figure 113 BIOLOGICAL & POISON HAZARD! Use the correct person- al protection equipment when handling cutting fluid. Follow federal, state, and fluid manu- facturer requirements for proper disposal. Adding Cutting Fluid Figure 113. Figure 114 Figure 114.

  • Page 78: Changing Cutting Fluid

    Changing Cutting Fluid Items Needed To change the cutting fluid: Tip: Leave one or more magnets at the bot- tom of the reservoir to collect metal chips and make cleanup easier next time. This will also help keep small metal chips out of the pump.
  • Page 79 Brake Fluid NOTICE If the brake fluid reservoir becomes empty, air could be introduced into the hydraulic lines. This will greatly reduce the effective- ness of the brake system in stopping the spindle. To correct this condition, perform Figures 115–116 the Bleeding Brake System procedure on Page 86.
  • Page 80 Changing Brake Fluid Figure 117. Figure 118 Items Needed To change the brake fluid: Figure 117 Figure 118.
  • Page 81 Figure 118 Important: Before fully tightening the bracket hex bolts, adjust the bracket to make sure the brake pads are equally centered on the rotor. Figure 119. Figure 118 Note: If there is air in the brake line, foam or bubbles may appear first.

  • Page 82: Machine Storage

    To prepare your machine for long-term stor- Machine Storage age (a year or more): To prepare your machine for short-term stor- age (up to a year): Step 3...

  • Page 83: Section 7: Service

    SECTION 7: SERVICE Troubleshooting Page 14 Page 71 Machinery's Handbook...
  • Page 84 Page 83 Page 89) Page 48 Page 78 Page 78 Page 79 Page 80 Page 78 Page 80 Page 78...
  • Page 85 Page 44 Page 49 Page 78 Page 87...

  • Page 86: Gib Adjustment

    Saddle Gib Gib Adjustment Tools Needed To adjust the saddle gib: Figure 121 Important: Before adjusting the gibs, loosen the lock screw or bolt for the device so that the gibs can freely slide during adjustment. Cross Slide & Compound Rest Gibs Figure 120 Figure 121.
  • Page 87 Cross Slide Handwheel End Play Handwheel End Play Tools Needed To adjust the cross slide handwheel end play: Figure 123 Carriage & Tailstock Handwheel End Play Tools Needed To adjust the carriage or tailstock handwheel end play: Figure 123. Figure 122 Figure 124 Figure 122.

  • Page 88: Backlash Adjustment

    Backlash Adjustment Figure 125. NOTICE Reducing backlash to less than 0.002" is impractical and can lead to accelerated wear of the leadscrew and nut. Avoid the temptation to overtighten the components while adjusting. Compound Rest Tools Needed To adjust the compound rest backlash: Figure 125...
  • Page 89 Cross Slide Tools Needed Figure 127 To adjust the cross slide backlash: Figure 126 Figure 127. Figure 126. Step 2...

  • Page 90: Halfnut Adjustment

    Halfnut Adjustment Feedrod Clutch Adjustment Tools Needed To adjust the halfnut: NOTICE Making the feedrod clutch too tight defeats its purpose and could lead to carriage crash and lathe damage. Tool Needed Figure 128 To adjust the clutch release point: Figure 129 Figure 128.

  • Page 91: Brake Pads

    Note: Threading the set screws in will increase the pressure on the compression springs that force the steel balls into the indents of the clutch. This will make it easier for the clutch to slip when necessary. Figure 130. Threading the set screws out will decrease this pressure and make it harder for the clutch to slip.
  • Page 92 Items Needed Figure 132. Figure 132 Figure 133 Note: To order the O-rings and brake pad set, con- tact Grizzly Customer Service at (800) 523-4777. Replacing Brake Pads Figure 133. Figure 132...
  • Page 93 Figure 134 Figure 135. Figure 134. Step 8 Tip: Apply a small amount of silicone grease to the O-rings to keep them in place on the intermediate plate as you re-assemble the caliper. Do not use a petroleum-based grease that can swell the O-rings. Note: Do not immerse the caliper housings in brake cleaner.
  • Page 94 Bleeding Brake System Items Needed To bleed the air from the brake system: Figure 136. Figure 136 Important: Continually monitor the brake fluid lever in the reservoir and make sure that it stays full. If the reservoir empties, additional air will be forced into the hydraulic line and you will have to re-start this procedure from the beginning.
  • Page 95 Tools Needed Shear Pin Replacement To replace a broken shear pin: Figure 137 Figure 139 Figure 139. Figure 137. Figure 138 Important: Take care in the next step not to bend the unsupported leadscrew. Figure 138. NOTICE If you must drill out the shear pin pieces, use a drill bit ⁄...
  • Page 96 Gap Insert Removal & Installation Gap Installation Figure 140 Figure 140. NOTICE The gap insert was installed, then ground flush with the bed at the factory to ensure a precision fit and alignment. Therefore, if the gap insert is removed, it may be diffi- cult to re-install it with the same degree of accuracy.

  • Page 97: Bearing Preload

    Bearing Preload Figure 141. Figure 142 Tools Needed To adjust the spindle bearing preload: Figure 142. Figure 141...
  • Page 98 Figure 144 Step 8 Step 9 Note: You may have to tap on the outboard end of the spindle as explained in Step 9 to help unload the spindle preload and break the spindle nut loose. Figure 144. Figure 143 essential Figure 143.
  • Page 99 Tip: Since it takes great effort to properly turn the spindle nut, you may find it difficult to know if you have gone past the zero end play point or not. It is easiest to have another per- son watch dial while you tighten the spindle nut.

  • Page 100: Section 8: Wiring & Electrical

    SECTION 8: WIRING & ELECTRICAL Wiring Safety Instructions SHOCK HAZARD. WIRE/COMPONENT DAMAGE. MOTOR WIRING. MODIFICATIONS. CAPACITORS/INVERTERS. WIRE CONNECTIONS. CIRCUIT REQUIREMENTS. EXPERIENCING DIFFICULTIES. The photos and diagrams included in this section are best viewed in color. You can view these pages in color at www.grizzly.com.

  • Page 101: Wiring Overview

    Wiring Overview READ ELECTRICAL SAFETY ON PAGE 92!
  • Page 102 G9730 Control Panel Wiring READ ELECTRICAL SAFETY ON PAGE 92!
  • Page 103 G9730 Component Wiring Spindle Motor Spindle Direction Switch Control Panel Cutting Fluid Pump Motor Master Power Switch Junction 220V L6-30 Plug (As Recommended) READ ELECTRICAL SAFETY ON PAGE 92!
  • Page 104 G9731 Control Panel Wiring READ ELECTRICAL SAFETY ON PAGE 92!
  • Page 105 G9731 Component Wiring Spindle Motor Spindle Direction Switch Control Panel Cutting Fluid Pump Motor Junction Master Power Switch 220V 15-15 Plug (As Recommended) READ ELECTRICAL SAFETY ON PAGE 92!
  • Page 106 Electrical Locations Figure 146. Control panel wiring. Figure 148. Main power switch wiring. Figure 147. Electrical cabinet and motor wiring.

  • Page 107: Section 9: Parts

    SECTION 9: PARTS Headstock Casing REF PART # DESCRIPTION REF PART # DESCRIPTION P9730001 HEADSTOCK CASE P9730020 PLATE P9730002 HEADSTOCK COVER P9730021 ELBOW 1/2 PT P9730003 PLUG P9730022 PLUG 1/2 PT P9730004 BEARING SEAT P9730023 PLUG 3/8 PT P9730005 GASKET P9730024 OIL SIGHT GLASS P9730006A...

  • Page 108: Headstock Gears

    Headstock Gears 1 REF PART # DESCRIPTION REF PART # DESCRIPTION P9730101 MAIN SPINDLE P6004ZZ BALL BEARING 6004 ZZ P9730102 "A" SHAFT P6204ZZ BALL BEARING 6204 ZZ P9730103 BUSHING PR78M EXT RETAINING RING 55MM P9730104 BEARING WASHER 20 X 28.5 X 4.1 PR43M EXT RETAINING RING 50MM P9730105...
  • Page 109 Headstock Gears 2 REF PART # DESCRIPTION REF PART # DESCRIPTION P9730201 "D" SHAFT PR09M EXT RETAINING RING 20MM P9730202 COMPOUND GEAR 20T/40T/30T PR58M EXT RETAINING RING 24MM P9730203 COMPOUND GEAR 20T/38T PR18M EXT RETAINING RING 17MM P9730204 BUSHING PR08M EXT RETAINING RING 19MM P9730205 "E"...

  • Page 110: Headstock Controls

    Headstock Controls REF PART # DESCRIPTION REF PART # DESCRIPTION P9730301 SHIFT FORK ROD P9730404 LOCK COLLAR P9730302 GEAR 41T P9730405 KNOB DIAL P9730303 LEVER P9730406 LEVER KNOB P9730304 LEVER P9730407 LEVER P9730305 SHIFT FORK SLEEVE P9730408 DIAL KNOB P9730306 SHIFT FORK SLEEVE P9730409 GEAR SHIFT SHAFT...
  • Page 111 Gearbox Casing REF PART # DESCRIPTION REF PART # DESCRIPTION P9730701 INCH GEARBOX CASE P9730707 CASING COVER GASKET P9730702 BEARING SEAT P9730708 BEARING SEAT GASKET P9730703 BEARING SEAT P9730709 OIL SIGHT GLASS P9730704 CASING COVER P9730710 PLUG 1/4 PT P9730705 CASING COVER GASKET PCAP01M CAP SCREW M6-1 X 16...

  • Page 112: Gearbox Gears

    Gearbox Gears REF PART # DESCRIPTION REF PART # DESCRIPTION P9730801 "G" DRIVE SHAFT P9730823 BEARING SEAT P9730802 BEARING END CAP P9730824 GEAR 21T P9730803 GEAR 21T P9730825 "H" SHAFT P9730804 BEARING WASHER 1" X 1 X 1.5" P9730826 GEAR 24T/19T P9730805 "G"...

  • Page 113: Gearbox Controls

    Gearbox Controls REF PART # DESCRIPTION REF PART # DESCRIPTION P9730901 INCH GEARBOX COVER PRP28M ROLL PIN 5 X 40 P9730902 HANDLE KNOB PORP010 O-RING 9.8 X 1.9 P10 P9730903 KNOB SHAFT PSTB001 STEEL BALL 1/4 P9730904 GEAR 29T P9730917 COMP SPRING 1.2 X 4.2 X 40.5 X 14 P9730905 GEAR RETAINING PLATE...
  • Page 114 Apron PART # DESCRIPTION PART # DESCRIPTION 1701 P97301701 RIGHT HAND APRON CASING 1713 P1528 THRUST NEEDLE BEARING 1528 1702 P97301702 GEAR SHAFT 13T 1714 PK20M KEY 5 X 5 X 15 1703 P97301703 BUSHING 1715 PORP012 O-RING 11.8 X 2.4 P12 1704B P97301704B INDEX RING INCH 1716 PORP014...
  • Page 115 Apron Gears REF PART # DESCRIPTION REF PART # DESCRIPTION 1901 P97301901 GEAR 50T 1917 P97301917 LEVER 1902 P97301902 GEAR SHAFT 13T 1918 P97301918 BEARING WASHER 16 X 31.75 X 3 1903 P97301903 DOUBLE GEAR 20T/51T 1919 PRP05M ROLL PIN 5 X 30 1904 P97301904 PULL-PUSH LEVER 1920 P97301920...
  • Page 116 Thread Dial REF PART # DESCRIPTION REF PART # DESCRIPTION 2001 P97302001 THREAD DIAL HOUSING 2012 PCAP30M CAP SCREW M6-1 X 45 2004 P97302004 THREAD DIAL SHAFT 2013 PCAP02M CAP SCREW M6-1 X 20 2007 P97302007 GEAR 24T 2015 P97302015 THREAD DIAL 2011 P97302011 BEARING WASHER 1/4"...
  • Page 117 Carriage PART # DESCRIPTION PART # DESCRIPTION P9730926 FOLLOW REST ASSEMBLY 2117 P97302117 LOCK BOLT M6-1 X 40 P9730950 STEADY REST ASSEMBLY 2118 PW03M FLAT WASHER 6MM 2101 P97302101 CARRIAGE CASTING 2119 PLUBE001 TAP-IN BALL OILER 1/4 2102A P97302102A CROSS LEADSCREW 16-10 X 423 2120 PN01M HEX NUT M6-1...
  • Page 118 Slides PART # DESCRIPTION PART # DESCRIPTION 2201 P97302201 CROSS SLIDE 2222 P97302222 HANDLE KNOB 2202 P97302202 SWIVEL BASE 2223 P97302223 T-NUT M8-1.25 2204 P97302204 COMPOUND SLIDE INCH 2224 P97302224 LOCK COLLAR 7/16-20 2205A P97302205-1 LEADSCREW NUT 13.5-10 INCH 2225 P97302225 BUSHING 2206A P97302206A...
  • Page 119 Tailstock PART # DESCRIPTION PART # DESCRIPTION 2301 P97302301 TAILSTOCK BODY 2318 P97302318 CLAMP BUSHING 2302 P97302302 TAILSTOCK BARREL 2319 P97302319 CLAMP BUSHING 2304 P97302304 LEADSCREW INCH 2320A P97302320-1 LEADSCREW NUT 16-10 INCH 2305 P97302305 INDEX RING INCH 2321 P97302321 ADJUSTING SCREW M10-1.5 X 40 2306 P97302306...

  • Page 120: Bed Assembly

    Bed Assembly REF PART # DESCRIPTION REF PART # DESCRIPTION 2401 P97302401 GAP BED 2428 PSTB001 STEEL BALL 1/4 2402 P97302402 GAP PIECE 2429 P97302429 COMP SPRING 1.2 X 4.2 X 40.5 X 14 2403 P97302403 RACK 2430 P97302430 COMP SPRING 1.2 X 3.8 X 21 X 8 2404 P97302404 LEADSCREW INCH 2431 P97302431...

  • Page 121: Cabinet Stand

    Cabinet Stand G9730 Only PART # DESCRIPTION PART # DESCRIPTION 510-1 P9730510-1 PLASTIC COOLANT HOSE 2524-1 P97302524-1 MOTOR JUNCTION BOX (G9730) 510-2 P9730510-2 COOLANT NOZZLE 2524-1 P97312524-1 MOTOR JUNCTION BOX (G9731) 510-3 P9730510-3 COOLANT VALVE 2524-2 P97302524-2 TERMINAL BLOCK (G9730) 510-4 P9730510-4 COOLANT STAND PIPE...

  • Page 122: Brake System

    Brake System PART # DESCRIPTION PART # DESCRIPTION 2601 P97302601 FOOT BRAKE PEDAL 2617-1 P97302617-1 PISTON CAP 2602 P97302602 LEFT BRAKE PEDAL SHAFT 2618 PORP028 O-RING 27.7 X 3.5 P28 2603 P97302603 RIGHT BRAKE PEDAL SHAFT 2619 P97302619 BUSHING 2604 P97302604 SHAFT SEAT 2620...

  • Page 123: End Gears

    End Gears PART # DESCRIPTION PART # DESCRIPTION 2701 P97302701 END COVER 2709 P97302709 TOP END COVER BOLT 2702 P97302702 END GEAR BRACKET 2710 P97302710 BOTTOM END COVER BOLT 2703 P97302703 IDLER GEAR INCH 2711 P97302711 KNURLED KNOB 2704 P97302704 END GEAR 40T INCH 2712 P97302712...
  • Page 124 Electrical Cabinet Components REF PART # DESCRIPTION REF PART # DESCRIPTION 2801 P97302801 TERMINAL BAR 24P 2806 P97302806 TRANSFORMER YA CHING 220V (G9730) 2802 P97302802 CONTACTOR TELE LC1D18 110V (G9730) 2806 P97312806 TRANSFORMER YA CHING 440V (G9731) 2803 P97302803 CONTACTOR TELE LC1D09 110V 2807 P97302807 FUSE HOLDER 40A 2804 P97302804 OL RELAY TELE LR3D03 2.5-4A 2808 P97302808 FUSE 600V 40A...
  • Page 125 Accessories REF PART # DESCRIPTION REF PART # DESCRIPTION P9730039 3-JAW CHUCK 7" W/JAWS 2913 P97302913 DEAD CENTER MT#3 CARBIDE TIP 2901 P97302901 FACEPLATE 10" 2914 P97302914 DEAD CENTER MT#3 HSS 2902 P97302902 BACK PLATE 8" 2915 PWR1113 COMBO WRENCH 11/13 2903 P97302903 4-JAW CHUCK 8"...

  • Page 126: Machine Labels

    MUST maintain the original location and readability of the labels on the machine. If any label is removed or becomes unreadable, REPLACE that label before using the machine again. Contact Grizzly at (800) 523-4777 or www.grizzly.com to order new labels.

  • Page 127: Warranty Card

    WARRANTY CARD The following information is given on a voluntary basis. It will be used for marketing purposes to help us develop better products and services. Of course, all information is strictly confidential. Note: We never use names more than 3 times. _____________________________________________________________________ _________________________________________________________________________________ _________________________________________________________________________________...

  • Page 129: Warranty And Returns

    WARRANTY AND RETURNS...
  • Page 130 ® Buy Direct and Save with Grizzly – Trusted, Proven and a Great Value! ~Since 1983~ Visit Our Website Today For Current Specials! ORDER 24 HOURS A DAY! 1-800-523-4777...

This manual is also suitable for:

G9731

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