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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.
We post current The Model G0726 offers a 50–350 RPM range of manuals and manual updates for free on our web- spindle speeds and three auto-downfeed rates.
G. Control Panel (refer Page 28 for details) R. Table H. X-Axis Ball Handle S. Halogen Work Light X-Axis Power Feed Fine & Auto-Downfeed Controls (refer to Z-Axis Limit Switch Page 36 for details) K. Y-Axis Ball Handle U. Spindle Brake Model G0726 (Mfg. Since 7/11)
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H. Y-Axis Limit Stop D. Electrical Cabinet Y-Axis Digital Readout Scale & Cover E. Master Power Switch X-Axis Digital Readout Scale & Cover To reduce your risk of serious injury, read this entire manual BEFORE using machine. Model G0726 (Mfg. Since 7/11)
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A. Auto-Downfeed Rate Selector Knee B. Quill G. One-Shot Oiler C. Spindle NT40 H. Z-Axis Motor D. Saddle Lock Coolant Return Hose E. Z-AXIS Crank Safety Switch Model G0726 (Mfg. Since 7/11)
MACHINE DATA SHEET Customer Service #: (570) 546-9663 · To Order Call: (800) 523-4777 · Fax #: (800) 438-5901 MODEL G0726 12" X 54" MILLING MACHINE Product Dimensions: Weight................................3960 lbs. Width (side-to-side) x Depth (front-to-back) x Height..............55-5/8 x 61 x 93 in.
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The information contained herein is deemed accurate as of 4/5/2017 and represents our most recent product specifications. Model G0726 PAGE 2 OF 3 Due to our ongoing improvement efforts, this information may not accurately describe items previously purchased. Model G0726 (Mfg. Since 7/11)
Everyday ery. Never operate under the influence of drugs or eyeglasses are not approved safety glasses. alcohol, when tired, or when distracted. Model G0726 (Mfg. Since 7/11)
If normal safety pre- respect. Failure to do so could result in cautions are overlooked or ignored, seri- serious personal injury, damage to equip- ous personal injury may occur. ment, or poor work results. -11- Model G0726 (Mfg. Since 7/11)
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. -12- Model G0726 (Mfg. Since 7/11)
If the plug does not fit the available receptacle, or the machine must be reconnected for use on a different type of circuit, the reconnection must be made by a qualified electrician and comply with all local codes and ordinances. -13- Model G0726 (Mfg. Since 7/11)
• Straightedge 4' ........... 1 • Precision Level ........... 1 Unpacking The Model G0726 is a heavy machine. Serious personal injury may occur if safe moving methods are Your machine was carefully packaged for safe not used. To be safe, get transportation.
If you cannot find an item on this list, care- fully check around/inside the machine and packaging materials. Often, these items get lost in packaging materials while unpack- ing or they are pre-installed at the factory. -15- Model G0726 (Mfg. Since 7/11)
Repeat Steps 2–3 as necessary until clean, Figure 3. T23692 Orange Power Degreaser. then coat all unpainted surfaces with a quality metal protectant to prevent rust. -16- Model G0726 (Mfg. Since 7/11)
Only install in an Shadows, glare, or strobe effects that may distract access restricted location. or impede the operator must be eliminated. Wall 30" Minimum 72" 100" Figure 4. Minimum working clearances. -17- Model G0726 (Mfg. Since 7/11)
Figure 6. Note: Place padding between straps and mill to protect ram and ways, and to keep from cutting lifting straps. The Model G0726 is a heavy machine. Serious personal injury may occur if safe moving methods are Safety Hook not used.
Lag Screw Figure 7. Model H2683 12" Master Machinist's Level. Flat Washer Machine Base Lag Shield Anchor Concrete Drilled Hole Figure 8. Popular method for anchoring machinery to a concrete floor. -19- Model G0726 (Mfg. Since 7/11)
Figure 9. Ball handle installed (1 of 3). Screws Thread handles into small end of the ball handles and tighten them with 14mm wrench. Figure 11. Rear way cover installed (digital readout scale cover removed). -20- Model G0726 (Mfg. Since 7/11)
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Slide splash pan onto machine base, then secure it in place with cap screws removed in Step 6. Coarse Downfeed Lever Figure 15. Downfeed controls installed. 12. Thread auto-downfeed direction pin into hub of fine downfeed handwheel (see Figure 15). -21- Model G0726 (Mfg. Since 7/11)
Figure 16. Master power switch location. the wires, reposition cord, then tighten the strain relief so that the cord will not move when tugged on. Re-connect wires as instructed in Step 3. Close and lock electrical cabinet door. -22- Model G0726 (Mfg. Since 7/11)
Page 45. Fill coolant reservoir (refer to Coolant on Page 48 for detailed instructions). Make sure speed range selector is in the low position (refer to Adjusting Spindle Speed on Page 35 for detailed instructions). -23- Model G0726 (Mfg. Since 7/11)
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SWITCH to STOP position to halt spindle terminal bar (refer to Power Connection rotation. on Page 22 for detailed information). 14. Press EMERGENCY STOP button to turn machine OFF, then wait for spindle to stop on its own. -24- Model G0726 (Mfg. Since 7/11)
Loosen X- and Y-axis table locks on the front Break-In and Recommended Adjustments pro- of table (see Figure 19). cedures on the next page. X-Axis Locks Y-Axis Lock (1 of 2) Figure 19. X- and Y-axis table locks. -25- Model G0726 (Mfg. Since 7/11)
Turn the spindle switch to the reverse (REV) position, press the start button, then let the mill run for another 20 minutes in reverse. -26- Model G0726 (Mfg. Since 7/11)
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. -27- Model G0726 (Mfg. Since 7/11)
START button is pressed. Figure 23. Spindle brake lever. Z-Axis Up & Down Buttons. Control Z-axis pow- Spindle Brake Lever. Quickly brings the spindle ered movement. to a stop after power is cut to the spindle motor. -28- Model G0726 (Mfg. Since 7/11)
Unexpected table movement dur- Figure 25. Digital readout. ing operations could cause the cutter to bind with the workpiece, which could result in damage to the cutter or workpiece. -29- Model G0726 (Mfg. Since 7/11)
K. Y-Axis Limit Switch. Stops Y-axis table movement when it engages one of the limit Figure 28. Power feed unit stops. (Y-axis unit shown). Y-Axis Limit Stop (1 of 2). Limits Y-axis table movement. Figure 29. Limit stops and switches. -30- Model G0726 (Mfg. Since 7/11)
When you are finished using power feed, position the direction lever to the center OFF Crank position, then use power switch to turn unit OFF. Figure 30. Z-axis crank and safety switch. -31- Model G0726 (Mfg. Since 7/11)
Re-tighten locking bolts to secure ram in adjusting the tilt or rotation. Unexpected place. movement of the head during operations could cause the cutter to bind with the workpiece, which could result machine or workpiece damage. -33- Model G0726 (Mfg. Since 7/11)
Also, there are a large number of easy-to-use spindle speed calculators that can be found on the internet. These sources will help you take into account the applicable variables in order to deter- mine the best spindle speed for the operation. -34- Model G0726 (Mfg. Since 7/11)
Figure 40. Variable speed handwheel and readout windows. As you move selector handle, it may be necessary to rotate the spindle by hand to engage gears. Spindle Speed Range Selector Figure 39. Spindle speed range selector. -35- Model G0726 (Mfg. Since 7/11)
A. Auto-Downfeed Rate Selector. Selects one of the three auto-downfeed rates. B. Fine Downfeed Handwheel. Manually con- trols slow spindle downfeed. C. Auto-Downfeed Direction Pin. Starts, stops, and reverses the auto-downfeed direction. -36- Model G0726 (Mfg. Since 7/11)
To lower spindle, rotate fine downfeed Coarse handwheel. When quill dog meets downfeed Downfeed stop, clutch lever will disengage and spindle Lever will return to the top. Quill Lock Figure 43. Coarse downfeed handle installed. -37- Model G0726 (Mfg. Since 7/11)
This will enable you to test and confirm settings before beginning actual cutting. To avoid damage to the system gearing, never use the auto-downfeed system with spindle speeds over 1750 RPM. -38- Model G0726 (Mfg. Since 7/11)
Figure 46. Positions of auto-downfeed rate selector. Use coarse downfeed lever to lower spindle slightly until you can pull clutch lever out to the left and it locks in place, which will start auto-downfeed spindle travel. -39- Model G0726 (Mfg. Since 7/11)
Always protect your turns, then tap the top of the drawbar with hands when handling cutting tools. a dead-blow hammer or rubber mallet to break the tool holder loose. -40- Model G0726 (Mfg. Since 7/11)
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. H8368—Electric Power Drawbar Reduce your tool changing time to a fraction. This...
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• Anti-lift mechanism ensures the workpiece does not lift when jaws are tightened. See the current Grizzly catalog for full specifica- • Ductile iron body. tions. Features: 4.330" overall height (horizontal), 6.750" height to center hole (vertical), #3 Morse •...
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6" long parallels which are accurate to within 0.0003" in parallelism and 0.0002" in height. Figure 58. 1-2-3 and 4-5-6 Blocks. Figure 61. Steel parallel sets. www.grizzly.com 1-800-523-4777 order online at or call -43- Model G0726 (Mfg. Since 7/11)
Worn, frayed, cracked, or damaged wires. • Emergency STOP button not working cor- rectly. • Missing belt guards. • Reduction in braking speed or efficiency. • Coolant not flowing correctly. • Any other unsafe condition. -44- Model G0726 (Mfg. Since 7/11)
The recommended lubrication schedule is based on light-to-medium usage. Keeping in mind that lubrication helps to protect the value and operation of the mill, these lubrication tasks may need to be performed more frequently depending on usage. -45- Model G0726 (Mfg. Since 7/11)
Quill Gearing Bull Gear Oil Type ..Grizzly T23962 or ISO 68 Equivalent Grease Type ...... NLGI#2 or Equivalent Amount ..........Fill Oil Cup Amount ....Two Pumps from Grease Gun Add Frequency ....4–8 hrs. of Operation Add Frequency ....40 hrs. of Operation...
Remove hex nut and ball handle from power the movement is not smooth, repeat Steps unit end of the X-axis leadscrew. 2–8 until it is. Unthread and remove knurled retaining ring and graduated dial ring from end of leadscrew. -47- Model G0726 (Mfg. Since 7/11)
Catch Pan ............1 coolant in the reservoir may permanently Empty Bucket 5 Gal........... 1 damage the coolant pump, which will not Rubber Hose (optional) ........1 covered by the warranty. New Coolant ....... Approx. 6–7 Gallons -48- Model G0726 (Mfg. Since 7/11)
At least once a month, start mill and run all gear-driven components for a few minutes. This will keep bearings, bushings, gears, and shafts well lubricated and protected from cor- rosion. -49- Model G0726 (Mfg. Since 7/11)
6. Replace dented fan cover or fan. 7. Motor bearings are at fault. 7. Test by rotating shaft; rotational grinding/loose shaft requires bearing replacement. 8. Gearbox is at fault. 8. Rebuild gearbox for bad gear(s)/bearing(s). -50- Model G0726 (Mfg. Since 7/11)
2. Test/repair/replace. Knees moves in 1. Machine is wired out of phase. 1. Swap any two of the three incoming power wires opposite direction that connect to the machine (Page 22). of button selected. -51- Model G0726 (Mfg. Since 7/11)
The table (X-axis) has one gib located under the front of the table (see Figure 69). Screw X-Axis Gib Screw (1 of 2) Figure 72. Knee gib screw (1 of 6). Figure 69. Table gib screw (1 of 2). -52- Model G0726 (Mfg. Since 7/11)
Refer to Figure 75 for the location of the X-axis backlash adjustment plate as viewed Front from the left underside of the table. Cover Adjustment Plate Figure 73. Power feed secured to bearing bracket. Figure 75. X-axis backlash adjustment plate. -53- Model G0726 (Mfg. Since 7/11)
(see the illustration in Figure 77 for an example). Indicator Holder Spindle Dial Indicator Parallel Block Table Figure 77. Dial indicator mounted. -54- Model G0726 (Mfg. Since 7/11)
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Note: It is a good idea to repeat Steps 10–11 so that the head does not move loosely while again in case the head moved slightly during you adjust it in small amounts. the process of re-tightening the lock bolts. -55- Model G0726 (Mfg. Since 7/11)
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. -56- Model G0726 (Mfg. Since 7/11)
SECTION 9: PARTS Base Machine 127 128 147A 147-1 147-3 147-2 147-5 147-4 95 96 -59- Model G0726 (Mfg. Since 7/11)
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MOTOR FRONT BALL BEARING P6306ZZ BALL BEARING 6306ZZ 147-5 P0726147-5 MOTOR REAR BALL BEARING P0726080 BEARING RETAINING RING P0726148 CONTROL PANEL PIVOT ARM ASSY PCAP01M CAP SCREW M6-1 X 16 P0726149 CONTROL PANEL PLATE -60- Model G0726 (Mfg. Since 7/11)
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PHLP HD SCR M5-.8 X 10 P0726156 ON BUTTON SHSMAO Y090-LAY37 P0726152 UP BUTTON SHSMAO Y090-LAY37 P0726157 DOWN BUTTON SHSMAO Y090-LAY37 P0726153 PUMP SWITCH SHSMAO Y090-LAY37 P0726158 SPINDLE SWITCH YK AC3 200-500V P0726154 POWER LIGHT SHUANGKE AD56-22DS -61- Model G0726 (Mfg. Since 7/11)
Headstock 501-1 501-5 501-4 501-2 501-3 -66- Model G0726 (Mfg. Since 7/11)
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CAP SCREW M6-1 X 6 P0726602 CHAIN SHAFT P0726549 TAPERED KNOB 3/8-16 P0726604 CHAIN P0726550 BRAKE LEVER P0726605 CHAIN MASTER LINK PN08 HEX NUT 3/8-16 P0726606 MASTER LINK PIN PCAP06M CAP SCREW M6-1 X 25 P0726607 WORM GEAR -67- Model G0726 (Mfg. Since 7/11)
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SPEED CHANGE INDICATOR PLATE PCAP07M CAP SCREW M6-1 X 30 PCAP26M CAP SCREW M6-1 X 12 PCAP01M CAP SCREW M6-1 X 16 PN40 ACORN NUT 5/16-18 P0726612 BRASS SLEEVE P0726617 BRAKE PIVOT ARM P0726613 SPEED CHANGE DIAL -68- Model G0726 (Mfg. Since 7/11)
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. -72-...
REF PART # DESCRIPTION REF PART # DESCRIPTION PLABEL-63 DISCONNECT POWER LABEL PPAINT-1 GRIZZLY GREEN TOUCH-UP PAINT PLABEL-14A ELECTRICITY LABEL PLABEL-50B BIO-HAZARD LABEL P0726910 TRAINED PERSONNEL LABEL P0726914 220V 3-PH LABEL P0726911 MACHINE ID LABEL -73- Model G0726 (Mfg. Since 7/11)
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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.
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