16 inch x 24 inch variable-speed
wood lathe (52 pages)
Summary of Contents for Grizzly G9972Z
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MODEL G9972Z 11" x 26" LIGHT-DUTY LATHE w/GEARBOX 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.
Machine Data Sheet Customer Service #: (570) 546-9663 · To Order Call: (800) 523-4777 · Fax #: (800) 438-5901 MODEL G9972Z 11" X 26" BENCH LATHE W/ GEARBOX Product Dimensions: Weight... 490 lbs. Length/Width/Height... 51 x 23 x 19 in.
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Headstock Info Spindle Bore...1 in. Spindle Size... 1-3/4 in. Spindle Taper...MT#4 Spindle Threads... 8 No Of Spindle Speeds...6 Range Of Spindle Speeds...150, 300, 560, 720, 1200, 2400 RPM Spindle Type...Threaded Spindle Bearings... Tapered Roller Tailstock Info Tailstock Travel... 2-1/2 in. Tailstock Taper...
Additional Safety Instructions for Lathes UNDERSTANDING THE MACHINE: CLEANING MACHINE: USING CORRECT TOOLING: ELIMINATING A PROJECTILE HAZARD: SECURING A WORKPIECE: AVOIDING OVERLOADS: AVOIDING ENTANGLEMENT INJURIES: Like all machinery there is potential danger when operating this machine. Accidents are frequently caused by lack of familiarity or failure to pay attention.
SECTION 2: CIRCUIT REQUIREMENTS 110V Operation Serious personal injury could occur if you connect the machine to power before com- pleting the setup process. DO NOT connect the machine to the power until instructed later in this manual. Electrocution or fire could result if machine is not grounded and installed in compliance with electrical...
Wear safety glasses dur- ing the entire setup pro- cess! The Model G9972Z 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 rated for at least 750 lbs.
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Inventory Note: If you can't find an item on this list, check the mounting location on the machine or examine the packaging materials carefully. Occasionally we pre-install certain components for shipping purposes. Inventory: (Figure 3) Figure 3. Clean Up For optimum performance, clean all moving parts or sliding contact surfaces.
750 lbs. and in good working condition. If the lathe falls or tips over while moving it, serious personal injury and property damage could result. The Model G9972Z is a heavy machine. Serious personal injury may occur if safe moving methods are not used.
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Figure 6 Figure 6. NOTICE Make sure the lifting straps are between the leadscrew and bedway to avoid bending the leadscrew when lifting the lathe. Note: If necessary, move the carriage or tailstock to help balance the load. Note: Re-check the bedway after 24 hours, after two weeks, then annually to make sure it remains level.
Check Gearbox Oil Lubrication Page 41 GEARBOXES MUST BE FILLED WITH OIL! NO OIL SHIPPED WITH MACHINE! Requires ISO 68 or Equivalent Gear Oil. Test Run Troubleshooting Page 45 To test run the machine: Page 16 Lubrication Page 41 Figure 9. ALWAYS make sure the power feed lever and the half-nut lever are disengaged before starting the lathe to avoid carriage crashes...
Spindle Break-In Spindle Break-In NOTICE Successfully complete all of the spindle break-in steps to avoid rapid deterioration of the spindle bearings and other related parts. Lubrication Page 41 Spindle Speed Steps 4–6 Carriage Lock Test Figure 10. Recommended Adjustments Page Page 45 Factory adjustments that should be verified: Figure 10...
OMMEND that you read books, trade maga- zines, or get formal training before begin- ning any projects. Regardless of the con- tent in this section, Grizzly Industrial will not be held liable for accidents caused by lack of training. Basic Controls Figures 11–13...
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Carriage Figure 12. A. Follow Rest: B. 4-Way Tool Post Lock Lever: C. Compound Slide Handwheel: D. Thread Dial: E. Half-Nut Lever: Power Feed Lever: NOTICE NEVER attempt to engage the carriage power feed (lever up) and the half-nut (lever down) at the same time, and NEVER force these levers.
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Chuck & Faceplate Mounting/Removal ACCESSORIES Page 37 Tools Needed Mounting a Chuck or Faceplate Figure 14 Figure 14. Note: Overtightening the chuck or faceplate will make removal difficult and could damage the threads. Figure 15. Make sure the chuck or faceplate is firmly secure on the spindle and remove the chuck key.
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Figure 16 Figure 16. PINCH HAZARD! Protect your hands and the precision ground bedways with plywood or a chuck cradle when removing the lathe chuck! The heavy weight of a falling chuck can cause serious injury. Removing a Chuck or Faceplate Figure 14 Figure 16 Figure 15...
3-Jaw Chuck Figure 17. Tools Needed Mounting Workpiece in 3-Jaw Chuck Figure 17 Removing Jaws from 3-Jaw Chuck Note: Store the jaws in a place free from moisture and abrasives. Securely clamp your workpiece and remove the chuck key! Thrown objects from a lathe can cause serious injury or death to the operator and...
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Installing Jaws into 3-Jaw Chuck Figure 18 Figure 18. Steps 4–5 4-Jaw Chuck Large chucks are very heavy. Always get assistance when removing or installing large chucks to prevent personal injury or damage to the chuck or lathe. Tools Needed To mount a workpiece in the 4-jaw chuck: Page 18...
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Figure 19 Figure 19. Figure 20 Figure 20. Always use a low spindle speed when machining non-cylindrical or off-center workpieces to avoid ejecting the workpiece from the holding device at a high rate of speed. Failure to heed this warning could lead to serious personal injury, death or property damage.
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Centers Figure 22. NOTICE To avoid premature wear of the dead center or damage to the workpiece, always keep the dead center tip well lubricated during use. Using a Center in the Spindle Note: When using the dead center in the spindle, use a lathe dog so that your part will rotate with the spindle.
Offsetting Tailstock Tailstock Figure 23. Aligning Tailstock To align the tailstock: Moving and Placement Note: If the tailstock is slightly out of align- ment by a few thousands of an inch, the center drill will find the center point during the drilling process.
Note: The fingers should be snug enough to fully support the workpiece at all three points and also allow free rotational movement of the workpiece. Note: After prolonged use, the fingers will require milling or filing to clean up the contact surface.
Compound Slide Handwheel Dial Increments Tools Needed To set the compound slide angle: Figure 33 Figure 33. Resolution Tools Needed To load and use the tool post: Figure 34 Note: To properly secure the tool, make sure a minimum of two post cap screws are hold- ing the tool.
Spindle Speed Calculating the Correct Spindle RPM Figure 35 Note: Cutting speeds are expressed in sur- face feet per minute (SFM) that the cutter moves against the workpiece. Recommended Cutting Speeds Rough Cuts Note: These values are based on HSS cutting tools.
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Figure 36. The V-belt, change gears, and pulleys represent a serious entanglement hazard when the lathe is running. Always dis- connect the lathe from power before opening the change gear cover. Configuring the V-Belt Tools Needed To configure the V-belt: Figure 36 Note: This chart is also on the front of the headstock.
Figure 36 Note: The pulley slots are numbered 1–3 with number 1 being the outside slot. Power Feed Feed Rate NOTICE Feed rate is based on the spindle speed. High feed rates result in a rapidly moving carriage. Pay close attention to the feed rate you have chosen and keep your hand poised over the power feed lever.
Feed Rate Figure 40 Recommended Feed Rates Rough Cuts Note: These values are a guideline only. Refer to the MACHINERY’S HANDBOOK for more detailed information. Figure 40. Figure 42. Figure 41 Note: This lathe is shipped with the 24 tooth gear installed in the "a"...
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Tools Needed Configuring Change Gears Figure 42 Note: The feed rates are given in inches of carriage travel per revolution of the spindle (IPR). Note: Before you install the gears, thoroughly clean them with a stiff brush and mild solvent, then apply a light coat of NLGI #2 grease to the teeth.
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NOTICE NEVER move the feed rate dials while the lathe is running, and NEVER force the dials when shifting. If the dial will not engage, rotate the spindle by hand while keeping light pressure on the dial. As the spindle rotates, the feed rate gears will align and the dial will slip into position.
Threading Controls Power Feed Lever Figure 46 Figure 46. Half-Nut Lever Figure 47 Figure 47. Thread Dial & Chart Figure 49 Page 36 Figure 48 Figure 48. NOTICE NEVER attempt to engage the carriage power feed (lever up) and the half-nut (lever down) at the same time, and NEVER force these levers.
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Figure 49 Figure 49. Note: The thread dial is not used when cutting metric threads. Leave the half-nut engaged until the threads are complete. NOTICE DO NOT engage the half-nut when the spin- dle speed is over 300 RPM. Ignoring this instruction could result in damage to the leadscrew or carriage components.
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H2972—Cut Off Holder with Blade H4268— ⁄ " x ⁄ " x 5" Replacement Blade Figure 58. H2996—Double Ended Boring Bar Figure 59. H5936—2 Pc. Knurling Tool Set Figure 60. H2987—½" Bent Lathe Dog Figure 61.
SECTION 6: MAINTENANCE Always disconnect power to the machine before performing maintenance. Failure to do this may result in serious person- al injury. Schedule Daily Check: Every 6–8 Hours of Operation: Pages 41–44 After First Three Months and Annually: DO NOT use compressed air to blow away chips from the lathe to avoid the risk of flying metal debris injuring yourself or oth- ers, or driving the chips deep into the lathe...
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Lubrication Ball Oilers Lubricant Frequency Figures 62–66 Figure 62. NOTICE Follow reasonable lubrication practices as outlined in this manual for your lathe. Failure to do so could lead to premature failure of your lathe and will void the war- ranty. Figure 63.
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Feed Rate Gearbox Oil Reservoir Lubricant Frequency Tools Needed To check and add oil to the reservoir: Figure 67 Figure 67. The feed rate gearbox oil must be changed after the first three months of operation, then annually after that. Tools Needed To change the oil in the reservoir: Figure 67...
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Feed Lever Plunger Lubricant Frequency Figure 71 Figure 71. Bedways Lubricant Frequency ACCESSORIES Page 37 Change Gears Lubricant Follow reasonable lubrication practices as outlined in this manual for your lathe. Failure to do so could lead to premature failure of your lathe and will void the war- ranty.
Cross Slide Backlash Adjustment Tools Needed To adjust the cross slide backlash: Figures 72–73 Figure 72. Figure 73. Figure 73 Note: Turn the adjustment screw clockwise to reduce backlash and counterclockwise to increase it.
Gib Adjustments NOTICE Excessively loose gibs may cause poor workpiece finishes, and may cause undue wear of the sliding surfaces and ways. Over-tightening the gibs may cause prema- ture wear of these sliding surfaces. Tools Needed To adjust the cross slide and compound slide gibs: Figures 74–75 Figure 74.
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Half-Nut Adjustment Tools Needed To adjust the half-nut: Figure 76 Figure 76. Shear Pin Replacement Figure 77. Tools Needed To replace the shear pin: Figure 77...
Ribbed Belt Replacement Figure 78. Tools Needed To replace the ribbed belt: Note: It may be more convenient to access the motor mount hex nuts if you first remove the rear splash guard. Bearing Preload Figure Tools Needed To adjust the spindle bearing preload: Figure 79 Figure 79.
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Figure 79 Note: You may have to tap on the outboard spindle tube as explained in Step 6 to help unload the spindle preload and break the spanner nut loose. Figure 80. Figure 80 Figure 81. Note: While tightening the spanner nuts, rock the spindle back and forth slightly to make sure the spindle tapered roller bearings seat properly in their races.
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Figure 82. NOTICE Do not overtighten the outer spanner nut because additional pressure can force the bearings even tighter against the races in the headstock and cause the headstock to compress, crack, or cause bearing failure. To confirm that the spindle bearings are cor- rectly preloaded: Figure 82 Step...
GROUNDED CIRCUIT. WARNING! SHOCK HAZARD! Disconnect power before working on wiring. MOTOR WIRING. 5. EXPERIENCING DIFFICULTIES. NOTICE The photos and diagrams included in this section are best viewed in color. You can view these pages in color at www.grizzly.com.
Headstock Parts List REF PART # DESCRIPTION P9972Z0001 HEADSTOCK NAMEPLATE PS17M PHLP HD SCR M4-.7 X 6 PSB06M CAP SCREW M6-1 X 25 PW03M FLAT WASHER 6MM P9972Z0007 COMPRESSION SPRING .8 X 8 X 20 P9972Z0008 THREADED BLOCK PSB06M CAP SCREW M6-1 X 25 P9972Z0011 SPINDLE PK123M...
REF PART # DESCRIPTION P9972Z0801 P9972Z0802 RACK PSB33M CAP SCREW M5-.8 X 12 P9972Z0804 FEED LEADSCREW INCH P9972Z0805 LEADSCREW END BRACKET P9972Z0108 BALL OILER PSB02M CAP SCREW M6-1 X 20 PN02M HEX NUT M10-1.5 Bed Breakdown REF PART # P9972Z0809 P9972Z0810 PN02M PSS44M...
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. Label Placement...