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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.
Machine Description Manual Accuracy the Model g0746 is a 20" x 60" lathe. the Model We are proud to provide a high-quality owner’s g0749 is a 16" x 40" lathe. the main difference manual with your new machine! between the two models is the g0746 has a...
1. Model g0746 identification. A. headstock Feed rod b. d1-8 Camlock Mt#7 spindle M. Control rod c. 3-Jaw Chuck 10" N. Coolant reservoir & pump access D. steady rest O. Chip drawer E. halogen Work lamp p. safety Foot Brake Q.
Controls leadscrew and feed rod speed for threading and feeding operations. G. Leadscrew feed Rod Selection Lever: To reduce your risk of Enables leadscrew or feed rod. serious injury, read this entire manual bEfORE using machine. Model G0746/G0749 (Mfg. Since 3/13)
(1 of Q. carriage Handwheel: Moves carriage along the bed. y. Offset Scale: indicates relative distance of tailstock offset from spindle centerline. R. cross Slide Handwheel: Moves cross slide toward and away from workpiece. Model G0746/G0749 (Mfg. Since 3/13)
End Gears gears figure 8. End gear components. Configuring the end gears (shown in figure) 8 controls the speed of the leadscrew for thread- ing or the feed rod for power feed operations. Model G0746/G0749 (Mfg. Since 3/13)
MACHINE DATA SHEET Customer Service #: (570) 546-9663 · To Order Call: (800) 523-4777 · Fax #: (800) 438-5901 MODEL G0746 20" X 60" LATHE Product Dimensions: Weight................................4145 lbs. Width (side-to-side) x Depth (front-to-back) x Height............. 108-1/4 x 42-1/2 x 59 in.
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The information contained herein is deemed accurate as of 6/20/2013 and represents our most recent product specifications. Model G0746 PAGE 2 OF 3 Due to our ongoing improvement efforts, this information may not accurately describe items previously purchased. Model G0746/G0749 (Mfg. Since 3/13)
The information contained herein is deemed accurate as of 6/20/2013 and represents our most recent product specifications. Model G0749 PAGE 1 OF 3 Due to our ongoing improvement efforts, this information may not accurately describe items previously purchased. -11- Model G0746/G0749 (Mfg. Since 3/13)
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The information contained herein is deemed accurate as of 6/20/2013 and represents our most recent product specifications. Model G0749 PAGE 2 OF 3 Due to our ongoing improvement efforts, this information may not accurately describe items previously purchased. -12- Model G0746/G0749 (Mfg. Since 3/13)
Everyday ery. Never operate under the influence of drugs or eyeglasses are Not approved safety glasses. alcohol, when tired, or when distracted. -14- Model G0746/G0749 (Mfg. Since 3/13)
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Contact our debris. Make sure they are properly installed, technical support at (570) 546-9663. undamaged, and working correctly. -15- Model G0746/G0749 (Mfg. Since 3/13)
To reduce the risk of these hazards, avoid over- loading the machine during operation and make sure it is connected to a power supply circuit that meets the requirements in the following section. -18- Model G0746/G0749 (Mfg. Since 3/13)
Close and latch electrical box. until instructed later in this manual. reconnect machine to power supply. Extension cords Since this machine must be permanently con- nected to the power supply, an extension cord cannot be used. -19- Model G0746/G0749 (Mfg. Since 3/13)
Save the containers and all packing materials for possible inspection by the carrier or its agent. Otherwise, filing a freight claim can be difficult. When you are completely satisfied with the condi- tion of your shipment, inventory the contents. -20- Model G0746/G0749 (Mfg. Since 3/13)
AD. Carriage handwheel handle ...... 1 packaging materials. Often, these items get AE. Cross slide handwheel ......1 lost in packaging materials while unpack- ing or they are pre-installed at the factory. -21- Model G0746/G0749 (Mfg. Since 3/13)
14. t23692 orange power degreaser. repeat Steps 2–3 as necessary until clean, then coat all unpainted surfaces with a quality metal protectant to prevent rust. -22- Model G0746/G0749 (Mfg. Since 3/13)
— if you plan to use the included leveling bolts and hex nuts to level the lathe, install them now. 10. lower the lathe into position. 11. re-install the splash guard. -24- Model G0746/G0749 (Mfg. Since 3/13)
Lag Screw Flat Washer Machine Base Lag Shield Anchor Concrete Drilled Hole figure 18. Model h2683 precision level. figure 17. popular method for anchoring machinery to a concrete floor. -25- Model G0746/G0749 (Mfg. Since 3/13)
Jack screws figure 21. tailstock-end jack screws. — if using mounting hardware that does not allow for adjustment, level the lathe by placing metal shims between the lathe base and the floor before anchoring it. -26- Model G0746/G0749 (Mfg. Since 3/13)
For detailed instructions on where the coolant tank is located and how to add fluid, refer to coolant System Service on page 72. -27- Model G0746/G0749 (Mfg. Since 3/13)
25) is turned oFF. Make sure the wires have enough slack so they are not pulled tight or stretched. Close the main electrical cabinet door. Main power switch figure 25. location of the main power switch. -28- Model G0746/G0749 (Mfg. Since 3/13)
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28. spindle lever in middle (oFF) position. turn the main power switch oN and reset the EMErgENCy stop button by twisting it clockwise until it pops out. the power lamp on the control panel should illuminate. -29- Model G0746/G0749 (Mfg. Since 3/13)
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— if the brake pedal has no effect on the spindle lathe, push the EMErgENCy stop but- lever ton and call tech support for help. figure 30. spindle lever in down (forward) position. -30- Model G0746/G0749 (Mfg. Since 3/13)
Test Run procedure described in this manual, as the steps in that procedure prepare the lathe controls for the break-in process. -31- Model G0746/G0749 (Mfg. Since 3/13)
Regardless of the content in this sec- tion, Grizzly industrial will not be held liable 12. When finished cutting, moves the spindle for accidents caused by lack of training. lever to the oFF position, presses the foot brake to completely stop the spindle, then removes the workpiece.
Note: It is normal for studs to have a small amount of play or looseness after installing and tightening refer to camlock Stud installation for installing the cap screws. camlock studs on the chucks, faceplate, and drive plate. -33- Model G0746/G0749 (Mfg. Since 3/13)
LARGE, VERY HEAVY CHUCKS Fabricated Steel Pre-Threaded Hole Lifting Hook for Lifting Eye figure 33. inserting camlock studs into spindle cam holes. figure 32. Examples of common devices used during chuck installation and removal. -34- Model G0746/G0749 (Mfg. Since 3/13)
Spindle & Chuck Camlock Registration Marks Spindle INCORRECT INCORRECT Stud Too High: Stud Too Low: Turn In Turn Out One-Turn One-Turn figure 36. registration mark locations. figure 35. Correcting an improperly installed stud. -35- Model G0746/G0749 (Mfg. Since 3/13)
60° and tap it again. Make sure all the marks on the cams and Poor Scroll spindle are proper aligned for removal. CORRECT Gear Engagement INCORRECT figure 38. Jaw selection and workpiece holding. -36- Model G0746/G0749 (Mfg. Since 3/13)
— if the jaws do not converge evenly, remove them. re-install the jaws sequentially 1–3, figure 40. Jaw guide and jaw numbers. and make sure each one engages with the scroll-gear lead thread during its first rota- tion. -37- Model G0746/G0749 (Mfg. Since 3/13)
With help from another person or a holding device, position the workpiece so it is cen- tered in the chuck. figure 43. generic picture of non-cylindrical workpiece correctly mounted on the 4-jaw chuck. -38- Model G0746/G0749 (Mfg. Since 3/13)
Machining non-concentric workpieces at high speeds could cause the workpiece to be thrown from the lathe with deadly force. To reduce this risk, do not exceed 395 RpM, and use counter-weights to balance the faceplate or workpiece. -39- Model G0746/G0749 (Mfg. Since 3/13)
Note: The marks on the offset indicator are arbi- trary. For a precise offset, use a dial indicator to re-tighten the tailstock lock lever to secure check quill movement while adjusting the screws. the offset. -41- Model G0746/G0749 (Mfg. Since 3/13)
60° point, as illustrated in the figure below. Note: If necessary in the following step, refer to the Offsetting Tailstock subsection for detailed instructions. figure 51. turning a dead center. -42- Model G0746/G0749 (Mfg. Since 3/13)
56. Example photo of using a dead center, making sure that no lint or oil remains center with a faceplate and lathe dog. on the tapers. -44- Model G0746/G0749 (Mfg. Since 3/13)
Avoid over-tightening the center against the workpiece, or it may become difficult to remove later. Also, over-tightening will result in excessive friction and heat, which may damage the workpiece or center. -45- Model G0746/G0749 (Mfg. Since 3/13)
Note: To reduce the effects of friction, lubricate the fingers with anti-seize lubricant during opera- thoroughly clean all mating surfaces, then tion. place the steady rest base on the bedways so the triangular notch fits over the bedway prism. -46- Model G0746/G0749 (Mfg. Since 3/13)
Firmly secure the cutting tool with at least two tool post bolts. Check and adjust cutting tool to spindle cen- terline, as instructed in the next subsection. -48- Model G0746/G0749 (Mfg. Since 3/13)
For this to work, the tailstock must (Side View) be aligned to the spindle centerline (refer to Aligning Tailstock To Spindle centerline in this manual for detailed instructions). figure 67. Cutting tool aligned to the tailstock center. -49- Model G0746/G0749 (Mfg. Since 3/13)
Verify that tooling will not make contact with dial with 0.002" (0.05mm) increments. one full the chuck, jaws, or other components. revolution of the handwheel moves the slide 0.200". -50- Model G0746/G0749 (Mfg. Since 3/13)
Even though there is a lock-out device to prevent this, it could 1600 240 105 45 break if forced. 1150 130 55 figure 73. setting the spindle speed to 24 rpM. -52- Model G0746/G0749 (Mfg. Since 3/13)
Leadscrew feed Rod Selection Lever: When the lever is down, enables feed rod movement, thereby allowing powered car- riage movement. When lever is up, enables leadscrew for threading or pitch turning. -53- Model G0746/G0749 (Mfg. Since 3/13)
Move the leadscrew feed rod selection lever down. locate the applicable lever, dial, and gear positions on the chart. the carriage is now set up for a power feed rate of 0.0077 in./rev. -54- Model G0746/G0749 (Mfg. Since 3/13)
(see figure 84). 72t Change Combination gear gear 36t Change gear Combination gear V-Belt guard arm support hex Nut support figure 84. arm support and gear locations. -56- Model G0746/G0749 (Mfg. Since 3/13)
87. lever and dial settings for 16tpi. E lever position Move the leadscrew feed rod selection lever figure 86. 16 tpi and corresponding lever and dial positions. the lathe is now set up to cut 16 tpi threads. -57- Model G0746/G0749 (Mfg. Since 3/13)
Lever returns the carriage for the next pass and re- Engaged engages the half nut using the same thread dial setting to resume the cut in the previous pass. figure 88. apron threading controls. -58- Model G0746/G0749 (Mfg. Since 3/13)
19,21,23,27,38, Position 19,21,23,27,38, Position 1,2,3,4 1,2,3,4 1½,2½,3½,4½, Position figure 94. Example of an odd numbered inch 5½,6½,9½,10½, 1,3 or 2,4 thread pitch. 11½,13½ Position 1¼,1¾,2¼,2¾, 3¼,4¾,5¼,5¾, 1 Only 6¾ figure 91. thread dial chart. -59- Model G0746/G0749 (Mfg. Since 3/13)
6¾ for the desired pitch turning operation. To set levers and dials for 1.25 Mp: figure 96. Example of ⁄ ⁄ fractional tpi. Configure the gears as instructed in Alternate configuration on page 55. -60- Model G0746/G0749 (Mfg. Since 3/13)
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Note: In the next step, rock the chuck back Move the leadscrew feed rod selection lever and forth so the gears will mesh together. the lathe is now set up to turn 1.25 Mp. -61- Model G0746/G0749 (Mfg. Since 3/13)
Sulferized oils often are used for threading. For small projects, spot lubrications can be done with an oil can or brush, or omitted completely. figure 101. Coolant selection table. -62- Model G0746/G0749 (Mfg. Since 3/13)
To reduce this risk, only install accessories sharp. recommended for this machine by Grizzly. NOTICE Refer to our website or latest catalog for additional recommended accessories. T23962—iSO 68 Moly-D Way Oil, 5 gal.
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“middlemen” in the marketing structure—not a reflection of the quality. figure 108. h7991 Mini Mag Base indicator set figure 110. h6095 digital readout. -65- Model G0746/G0749 (Mfg. Since 3/13)
(especially parts that are exposed to water soluble cutting fluid). Use a quality iso 68 way oil (see page 64 for offerings from grizzly) to prevent corrosion. -66- Model G0746/G0749 (Mfg. Since 3/13)
We recommend using and operation of the lathe, these lubrication grizzly t23962 (iso 68) or t23963 (iso 32) lubri- tasks may need to be performed more fre- cants (see Accessories, page 64) for most of the quently than recommended here, depend- lubrication tasks.
Quick-change Gearbox Adding Oil the oil fill plug is located on top of the headstock, oil type ..grizzly t23962 or iso 68 Equivalent as shown in figure 112. oil amount .......... 9.5 Quarts Check/add Frequency ......... daily Change ....Every 1000 operating hours...
Apron One-Shot Oiler the one-shot oiler shown in figure 116 lubricates oil type ..grizzly t23962 or iso 68 Equivalent oil amount .......... 6.5 Quarts the bedways ways. Check/add Frequency ......... daily Change ....Every 1000 operating hours Checking Oil Level the apron oil sight glass is on the front of the apron, as shown in figure 114.
Oilers oil type ..grizzly t23963 or iso 32 Equivalent oil amount ........1 or 2 squirts lubrication Frequency ......... daily this lathe has 11 ball oilers that should be oiled on a daily basis before beginning operation. refer to figures 117–121 for their locations.
Make sure the end-gear cover remains closed whenever possible to keep the gears free of dust or debris from the outside environment. -71- Model G0746/G0749 (Mfg. Since 3/13)
Wear ....see Hazards on page 72 requirements. New Coolant ......... 5 gallons Empty 5-gallon Buckets w/lid ......2 slotted screwdriver #2 ........1 disposable shop rags ...... as Needed Magnets (optional) ..... as Many as desired -73- Model G0746/G0749 (Mfg. Since 3/13)
2. refer to the feeds and speed charts in Machinery's down under load. cutting operation. Handbook or a speeds and feeds calculator on the internet. 3. Cutting tool is dull. 3. sharpen or replace the cutting tool. -75- Model G0746/G0749 (Mfg. Since 3/13)
3. adjust gibs at affected component (see page 79). cutting. 4. dull cutting tool. 4. replace or resharpen cutting tool. 5. incorrect spindle speed or feed rate. 5. Use the recommended spindle speed and feed rate. -76- Model G0746/G0749 (Mfg. Since 3/13)
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9. replace gears. gear change levers 1. gears not aligned inside headstock/Quick- 1. rotate spindle by hand with light pressure on the will not shift into Change gearbox. lever until gear falls into place. position. -77- Model G0746/G0749 (Mfg. Since 3/13)
127. Cross slide backlash adjustment between these components. screw. adjust the backlash in a similar manner to that for the compound rest. screw figure 126. Compound rest backlash adjustment cap screw. -78- Model G0746/G0749 (Mfg. Since 3/13)
Oiler Lubrication on against the inner spanner nut to secure the page 70 for instructions and lubricant specifica- setting. tions. To adjust the cross slide gib: disCoNNECt lathE FroM poWEr! -79- Model G0746/G0749 (Mfg. Since 3/13)
Deflection access panel. ⁄ " Pulley figure 135. adjusting V-belt tension. Firmly tighten the hex nuts to secure the set- ting, then re-install the motor access panel and close the end-gear cover. -82- Model G0746/G0749 (Mfg. Since 3/13)
136. Minimum brake belt thickness. Note: When the brake band is new, the lining is approximately 4mm thick. If the lining thick- ness wears to 1m or less, the brake band must be replaced. -83- Model G0746/G0749 (Mfg. Since 3/13)
Step 3. in figure 140. refer to Adjusting brake subsection to ten- sion the brake. pre-load Bolts gap-Bed Cap screw dowel pin figure 140. Fasteners holding gap in place. -84- Model G0746/G0749 (Mfg. Since 3/13)
Technical source. Support at (570) 546-9663. The photos and diagrams included in this section are best viewed in color. You can view these pages in color at www.grizzly.com. -86- Model G0746/G0749 (Mfg. Since 3/13)
Note: We do our best to stock replacement parts whenever possible, but we cannot guarantee that all parts shown here are available for purchase. Call (800) 523-4777 or visit our online parts store at www.grizzly.com to check for availability.
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P07490056 CONTROL ROD (G0749) PSS136M SET SCREW M8-1.25 X 12 CONE-PT P07460057 SPINDLE LEVER PIVOT BLOCK P07460026 BRAKE PEDAL PIVOT SHAFT (G0746) PSS30M SET SCREW M10-1.5 X 10 P07490026 BRAKE PEDAL PIVOT SHAFT (G0749) P07460059 TAPERED PIN 6 X 30 PCAP92M CAP SCREW M12-1.75 X 40...
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G0746-49 bed & body parts List REF PART # DESCRIPTION PART # DESCRIPTION PB07M HEX BOLT M8-1.25 X 25 P07460155 DRAIN SCREEN P07460102 HINGE P07460156 CHIP TRAY (G0746) PLN04M LOCK NUT M8-1.25 P07490156 CHIP TRAY (G0749) PCAP06M CAP SCREW M6-1 X 25...
Headstock controls -95- Model G0746/G0749 (Mfg. Since 3/13)
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SET SCREW M12-1.75 X 12 PORG030 O-RING 3.1 X 29.4 G30 P07460593 COMPRESSION SPRING P07460546 PLUG PSTB005M STEEL BALL 10MM P07460547 DOWEL PIN 10 X 28 P07460595 RIGHT SPINDLE SPEED HUB/LEVER PRP42M ROLL PIN 3 X 20 -96- Model G0746/G0749 (Mfg. Since 3/13)
P07460809 COMBO GEAR 72T/76T P07460821 COMPRESSION SPRING 1 X 6 X 12 PCAP24M CAP SCREW M5-.8 X 16 PSTB002M STEEL BALL 8MM P07460811 SHAFT PR15M EXT RETAINING RING 30MM P07460812 COMBO GEAR W/KEY 66T/42T 12 X 22 -100- Model G0746/G0749 (Mfg. Since 3/13)
TOOL POST HUB/HANDLE 1027 P07461027 TAPERED PIN 3 X 20 1056 P07460055 TAPERED KNOB M12-1.75 X 40 1028 PSS26M SET SCREW M5-.8 X 6 1057 P07459055 BRASS PLUNGER 1029 P07460942 KNURLED THUMB SCREW M8-1.25 X 18 -103- Model G0746/G0749 (Mfg. Since 3/13)
1151 P07461151 HANDWHEEL RETAINER 1204 P07461204 LOCK COLLAR 1152 PFH88M FLAT HD SCR M8-1.25 X 20 1205 P07461205 WORM SHAFT 1153 P07461153 HANDWHEEL HANDLE M10-1.5 X 20 1206 PK151M KEY 8 X 8 X 55 -105- Model G0746/G0749 (Mfg. Since 3/13)
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WORM SHAFT SUPPORT 1218 P07461218 THREAD DIAL GEAR 16T 1212 PCAP01M CAP SCREW M6-1 X 16 1219 PRP73M ROLL PIN 4 X 30 1213 PCAP208M CAP SCREW M8-1.25 X 95 1220 PN03M HEX NUT M8-1.25 -106- Model G0746/G0749 (Mfg. Since 3/13)
THREADED SLEEVE 1313 P07461313 SHOULDER STUD M12-1.75 X 90 125L 1314 P07461314 SHOULDER STUD RETAINER CAP 1315 P07461315 THUMB KNOB 1316 PRP56M ROLL PIN 4 X 25 1317 PCAP26M CAP SCREW M6-1 X 12 -107- Model G0746/G0749 (Mfg. Since 3/13)
Safety labels help reduce the risk of serious injury caused by machine hazards. If any label comes off or becomes unreadable, the owner of this machine MUST replace it in the original location before resuming operations. For replacements, contact (800) 523-4777 or www.grizzly.com. -111-...
Would you recommend Grizzly Industrial to a friend? _____ Yes _____No Would you allow us to use your name as a reference for Grizzly customers in your area? Note: We never use names more than 3 times. _____ Yes _____No 10.
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FOLD ALONG DOTTED LINE Place Stamp Here GRIZZLY INDUSTRIAL, INC. P.O. BOX 2069 BELLINGHAM, WA 98227-2069 FOLD ALONG DOTTED LINE Send a Grizzly Catalog to a friend: Name_______________________________ Street_______________________________ City______________State______Zip______ TAPE ALONG EDGES--PLEASE DO NOT STAPLE...
WARRANTy & RETuRNS Grizzly Industrial, Inc. warrants every product it sells for a period of 1 year to the original purchaser from the date of purchase. This warranty does not apply to defects due directly or indirectly to misuse, abuse, negligence, accidents, repairs or alterations or lack of maintenance.