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Grizzly G2790, Owner'S Manual

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Grizzly G2790 Owner'S Manual Download Page 10

-8-

Model G2790 (Mfd. Since 04/13)

Additional Safety for Universal Knife Grinders

Serious injury or death can occur from impact injuries. Rotating grinding wheels can easily 

remove skin, or entanglement/amputation injuries can occur from being caught in moving 

parts or in-running pinch points. Flying sparks can ignite explosive or flammable materials. To 

minimize risk of getting hurt or killed, anyone operating machine MUST completely heed hazards 

and warnings below.

EYE PROTECTION.  Grinding  causes  small  par-
ticles to become airborne at a high rate of speed. 
ALWAYS wear safety glasses or face shield when 
using this machine.

MOUNTING TO WORKBENCH.  An  unsecured 
grinder  may  become  dangerously  out  of  con-
trol  during  operation.  Make  sure  the  grinder  is 
FIRMLY secured to the workbench.

WHEEL SPEED RATING. Wheels operated at a 
faster speed than they are rated for may fly apart 
during use. Before mounting a new wheel, be sure 
the  wheel  RPM  rating  is  equal  to  or  higher  than 
the speed of the grinder—3500 RPM.

WHEEL FLANGES. When mounting wheels only 
use the wheel flanges that are included with this 
grinder.  Other  flanges  may  not  properly  secure 
the wheel and will increase the risk of the wheel 
flying apart during operation.

WHEEL INSPECTION. Visually inspect the wheel 
and  perform  the  “ring  test”  before  installation  to 
ensure  that  it  is  safe  to  use.  A  wheel  that  does 
not pass the ring test may fly apart during opera-
tion—DO NOT use it!

DRY GRINDING. This grinder is not designed to 
work with cutting fluids. DO NOT use cutting flu-
ids, and keep all liquids away from the grinder to 
reduce the risk of electrocution. 

STARTING GRINDER. If  a  grinding  wheel  is 
damaged, it will usually fly apart shortly after start-
up. Never start the grinder with the wheel above 
the surface of the grinder table. Stand clear of the 
grinder  after  starting  it  and  wait  for  at  least  one 
minute before standing in front of it.

LUNG PROTECTION. Grinding produces hazard-
ous dust, which may cause long-term respiratory 
problems  if  breathed.  ALWAYS  wear  a  NIOSH- 
approved dust mask or respirator when grinding.

HAND/WHEEL CONTACT. Grinding wheels have 
the  capability  of  removing  a  lot  of  skin  quickly. 
Keep a firm grip on the tool or slide bar and posi-
tion your hands at a safe distance away from the 
wheel  when  grinding.  Do  not  wear  gloves  when 
grinding as they may get caught in the wheel and 
cause serious entanglement injuries.

GUARDS & SUPPORTS. Always keep the wheel 
guard secured in place when operating the grind-
er.  Always  keep  the  cutting  tool  firmly  clamped 
before  starting  the  machine.  Correctly  position 
and  lock  the  pivot  support  before  turning  the 
grinder 

ON.

EXPERIENCING DIFFICULTIES. If  at  any  time 
you  are  experiencing  difficulties  performing  the 
intended  operation,  stop  using  the  machine  and 
contact Tech Support at (570) 546-9663.

Summary of Contents for G2790

Page 1: ...odels manufactured since 04 13 COPYRIGHT 1992 BY GRIZZLY INDUSTRIAL INC REVISED MAY 2017 BL WARNING NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL INC 0346 PRINTED IN TAIWAN 177335 V3 05 17 ...

Page 2: ...ng grinding tool integrity and the usage of personal protective equipment The manufacturer will not be held liable for injury or property damage from negligence improper training machine modifications or misuse Some dust created by power sanding sawing grinding drilling and other construction activities contains chemicals known to the State of California to cause cancer birth defects or other repr...

Page 3: ...ing 14 Assembly 15 Test Run 16 SECTION 4 OPERATIONS 17 Grinding Tips 17 Wheel Selection 18 Wheel Care 18 Wheel Inspection Ring Test 19 Mounting Pivot Support 19 Sharpening Narrow Tools 20 Sharpening Wide Knives 20 SECTION 5 ACCESSORIES 24 SECTION 6 MAINTENANCE 26 Schedule 26 Cleaning 26 Lubrication 26 Wheel Dressing 27 Wheel Replacement 28 SECTION 7 SERVICE 29 Troubleshooting 29 SECTION 8 WIRING 3...

Page 4: ...till make an occasional mistake Also owing to our policy of continuous improve ment your machine may not exactly match the manual If you find this to be the case and the difference between the manual and machine leaves you in doubt immediately call our techni cal support for updates or clarification For your convenience we post all available docu mentation on our website at www grizzly com Any upd...

Page 5: ... Knob Knife Clamp Wheel Guard Table Handwheel Table Grinding Wheel Slide Table Mounting Hole Pivot Support Adjustment Knob Table Lock Pivot Support Knife Adjustment Knob ON OFF Switch Slide Bar To reduce your risk of serious injury read this entire manual BEFORE using machine Adjustable Guard ...

Page 6: ...ard Content Machine Weight 59 lbs Box 1 Length Width Height 20 x 13 x 13 Box 2 Length Width Height 26 x 5 x 3 Electrical Switch ON OFF Toggle Switch Voltage 110V Cord Length 4 ft Cord Gauge 18 gauge Minimum Circuit Requirement 15A Included Plug NEMA 5 15 Motor Type TEFC Capacitor Start Induction Horsepower 1 2 HP Voltage 110V Phase Single Amps 3A Speed 3500 RPM Cycle 60 Hz Power Transfer Direct Dr...

Page 7: ...e Type 5 Diameter 6 Thickness 11 2 Bore 1 2 Construction Base Cast Iron Table Cast Iron Other Specifications Country of Origin Taiwan Warranty 1 Year Serial Number Location ID Label on Front of Motor Approximate Assembly Setup Time 15 Minutes Features Knife Holder Adjusts From 20 70 120 Grit Aluminum Oxide Grinding Stone Raises and Lowers ...

Page 8: ... proof DANGEROUS ENVIRONMENTS Do not use machinery in areas that are wet cluttered or have poor lighting Operating machinery in these areas greatly increases the risk of accidents and injury MENTAL ALERTNESS REQUIRED Full mental alertness is required for safe operation of machin ery Never operate under the influence of drugs or alcohol when tired or when distracted For Your Own Safety Read Instruc...

Page 9: ... moving parts or flying debris Make sure they are properly installed undamaged and working correctly BEFORE operating machine FORCING MACHINERY Do not force machine It will do the job safer and better at the rate for which it was designed NEVER STAND ON MACHINE Serious injury may occur if machine is tipped or if the cutting tool is unintentionally contacted STABLE MACHINE Unexpected movement dur i...

Page 10: ...tallation to ensure that it is safe to use A wheel that does not pass the ring test may fly apart during opera tion DO NOT use it DRY GRINDING This grinder is not designed to work with cutting fluids DO NOT use cutting flu ids and keep all liquids away from the grinder to reduce the risk of electrocution STARTING GRINDER If a grinding wheel is damaged it will usually fly apart shortly after start ...

Page 11: ...undersized circuit 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 specified circuit requirements For your own safety and protection of property consult an electrician if you are unsure about wiring practices or electrical codes in your area Note Circuit requirements in this manual apply to a...

Page 12: ...ord size gets longer and the gauge size gets smaller higher gauge numbers indicate smaller sizes Any extension cord used with this machine must be in good condition and contain a ground wire and matching plug receptacle Additionally it must meet the following size requirements Minimum Gauge Size 16 AWG Maximum Length Shorter is Better 50 ft Grounding Plug Requirements Figure 4 Typical 5 15 plug an...

Page 13: ...a freight claim It is also extremely helpful if you need to return your machine later Unpacking SUFFOCATION HAZARD Keep children and pets away from plastic bags or packing materials shipped with this machine Discard immediately 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 ma...

Page 14: ...e 5 Box 1 inventory A B C D E F G H I J K L M NOTICE 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 Inventory The following is a list of items shipped with your machine Before beginning setup lay these items out and inventory them I...

Page 15: ...reaser then let it soak for 5 10 minutes 3 Wipe off the surfaces If your cleaner degreas er is effective the rust preventative will wipe off easily If you have a plastic paint scraper scrape off as much as you can first then wipe off the rest with the rag 4 Repeat Steps 2 3 as necessary until clean then coat all unpainted surfaces with a quality metal protectant to prevent rust NOTICE Avoid chlori...

Page 16: ... holes that allow it to be fastened to a workbench or other mounting surface to prevent it from moving during operation and causing accidental injury or damage The strongest mounting option is a Through Mount see example below where holes are drilled all the way through the workbench and hex bolts washers and hex nuts are used to secure the machine in place Machine Base Workbench Hex Bolt Flat Was...

Page 17: ...ar knobs position adjustable guard approximately 1 8 away from knife clamp or stationary clamp then tighten star knobs to secure setting see Figure 11 Refer to Page 20 or Page 22 for detailed instructions on installing the stationary clamps and knife clamp The adjustable guard reduces the risk of injury by shielding the user from flying sparks debris and preventing fingers from contacting the grin...

Page 18: ...t is properly connected to power and safety components are functioning correctly If you find an unusual problem during the test run immediately stop the machine disconnect it from power and fix the problem BEFORE operating the machine again The Troubleshooting table in the SERVICE section of this manual can help DO NOT start machine until all preceding setup instructions have been performed Operat...

Page 19: ... when using the slide bar To avoid overheating the tool grind the cut ting tool with multiple light passes instead of one heavy operation Concentrate on the task at hand STOP grinding if other people are distracting you or your mind is on something else To some correctly grinding cutting tools is an art If you are not familiar with this process get help from an experienced person or read books to ...

Page 20: ...e of wheel Always refer to the manufacturer s technical data for a complete explanation when choosing a grinding wheel Wheel Care Your safety when grinding depends in a large part on the condition of the wheel during opera tion A wheel in poor condition increases the risk of it flying apart while spinning and injuring the operator or causing property damage Follow these rules to reduce the risk of...

Page 21: ...in the air with a piece of cord or string looped through the center hole 3 At the four spots on the wheel shown in Figure 13 gently tap the wheel with a non metallic object such as a screwdriver handle or wooden mallet Figure 13 Tapping locations for a ring test 4 An undamaged wheel will emit a clear metal lic ring or ping sound in each of the four spots A damaged wheel will respond with a dull th...

Page 22: ... with the position of the tool relative to the wheel raise the grinder table slightly above the wheel then turn the grinder ON 7 While firmly holding the tool on the pivot sup port slowly and carefully lower the grinder table until the tool contacts the wheel to begin sharpening the tool Note Keep in mind that with a dry grinding operation tools can heat up quickly and lose their temper Sharpening...

Page 23: ...gure 16 4 Remove the pivot support from the machine then secure it to the back of the slide table with the three hex nuts and flat washers removed in Step 3 as shown in Figure 17 Figure 16 Slide table dismantled Slide Table Hex Bolts Flat Washers Figure 17 Pivot support attached to the slide table Pivot Support 6 Install 5 1 4 20 x 23 4 knife adjustment knobs on the slide bar each with 1 O ring an...

Page 24: ... beyond the front edge of the slide bar 8 When you are satisfied that the knife extends beyond the slide bar the same amount along its length and that the supporting adjustment knobs are all making even contact with the back of the knife re tighten the jam nuts and attach the knife clamp to the slide bar with 5 1 4 20 x 7 8 knife clamp knobs as shown in Figure 21 9 Use the fine ruler to re check t...

Page 25: ...wheel is below the table sur face then move the slide bar so that the end of the knife is over the right hand side of the wheel as shown in Figure 23 13 Re install the adjustable guard then turn the grinder ON 14 Slowly lower the grinder table until the knife and wheel just make contact then slowly slide the knife across the wheel If contact does not seem smooth and con sistent between the knife a...

Page 26: ...h shop safety Figure 26 Our most popular eye protection T20451 H0736 T20452 T20502 T20503 H7194 H2499 Small Half Mask Respirator H3631 Medium Half Mask Respirator H3632 Large Half Mask Respirator H3635 Cartridge Filter Pair P100 Wood dust has been linked to nasal cancer and severe respiratory illnesses If you work around dust everyday a half mask respirator can be a lifesaver Also compatible with ...

Page 27: ...el Cast iron handle provides stabilizing mass for better control Figure 27 Rotary type dressing tools D2056 Tool Table Get that benchtop tool off your bench and put it on this sturdy stand instead Flared legs and adjustable rubber feet ensure stability and re duce machine vibration Butcher block finish table top measures 1 x 13 x 23 and is 301 2 from the floor Bottom measures 21 x 32 700 lb capaci...

Page 28: ...e grinder Check dress the grinding wheel surface Page 27 Schedule Lubrication The bearings of the motor are factory lubricated and sealed Simply leave them alone unless they need replacement Raise the table up to access the full length of the handwheel lead screw as shown in Figure 31 Use a shop rag and mineral spirits to clean off the threads of the leadscrew then brush or wipe on a thin coat of ...

Page 29: ... starting position two to three times 7 Lower the table slightly and repeat Step 6 Note Several light passes with the dress ing tool will produce the best results with the least amount of wear or damage to the wheel or the dressing tool Grinding wheels have the capability of removing a lot of skin quickly Keep a firm grip on the dresser tool and holder and keep your hands a safe distance away from...

Page 30: ...en lift the wheel flange and cap screw up and off the motor spindle see Figure 34 Figure 34 Grinding wheel removed from grinder 4 Perform the Wheel Inspection Ring Test procedure Page 19 on the new wheel 5 If the new wheel is acceptable carefully place it on the motor spindle 6 Install the top wheel flange and tighten the cap screw to secure the assembly Note Do not over tighten the wheel mount in...

Page 31: ...cts 6 Motor overheated 7 Motor at fault 1 Wire motor correctly Page 32 2 Test for good contacts correct wiring 3 Test repair replace 4 Use new grinding wheel reduce the depth of cut and feed rate 5 Test all legs for power replace if faulty 6 Clean motor let cool and reduce workload 7 Test repair replace Machine has vibration or noisy operation 1 Motor or component loose 2 Grinding wheel at fault b...

Page 32: ...ons and allow workpiece to cool in between Wheel dulls quickly grit falls off 1 Depth of cut too great 2 Wheel grade is too soft 3 Wheel exposed to moisture 4 Wheel dressed incorrectly 5 Defective wheel bonding 1 Reduce depth of cut take multiple light passes 2 Use harder grade of wheel 3 Store wheel away from moisture replace wheel 4 Correctly dress the wheel Page 27 5 Replace wheel Page 28 Wheel...

Page 33: ...nt at the time of printing but may not match your machine If you find this to be the case use the wiring diagram inside the motor junction box CAPACITORS INVERTERS Some capacitors and power inverters store an electrical charge for up to 10 minutes after being disconnected from the power source To reduce the risk of being shocked wait at least this long before working on capacitors EXPERIENCING DIF...

Page 34: ...d Since 04 13 READ ELECTRICAL SAFETY ON PAGE 31 Ground Motor 1 2 3 ON OFF Switch Start Capacitor 10MFD 250VAC Ground Neutral Hot 110 VAC NEMA 5 15 Plug As Recommended Wiring Diagram Figure 35 G2790 wiring wiring diagram ...

Page 35: ...7 8 9 10 10 10 11 12 12 56 13 14 14A 15 16 17 18 19 21V2 22V2 23 24 25 26V2 27 28V2 28 1 35 36 37 38V2 48 54 44 45 46 47 49V2 50 51 53 52 52 59 20V2 58 20V2 29V2 30 31V2 33 34 55 32V2 39 41 10 40V3 57 12 42V2 40A Parts Breakdown SECTION 9 PARTS ...

Page 36: ...045 FLAT WASHER 5 16 16 P2790016 STAR KNOB 10 24 X 3 4 46 P2790046 WIRE NUT 14 22 GAUGE 17 P2790017 STATIONARY CLAMP 47 P2790047 DRESSING STONE 18 P2790018 STATIONARY CLAMP NUT 10 24 48 P2790053 STRAIN RELIEF STRAIGHT LT 19 P2790019 DRESSING TOOL HOLDER 49V2 P2790049V2 MACHINE ID LABEL CSA V2 09 12 20V2 P2790020V2 SET SCREW 5 16 18 X 5 16 V2 04 14 50 P2790054 RESPIRATOR GLASSES 1 5W X 2 5H 21V2 P2...

Page 37: ... metalworker ____ 0 2 Years ____ 2 8 Years ____ 8 20 Years ____20 Years 6 How many of your machines or tools are Grizzly ____ 0 2 ____ 3 5 ____ 6 9 ____10 7 Do you think your machine represents a good value _____Yes _____No 8 Would you recommend Grizzly Industrial to a friend _____Yes _____No 9 Would you allow us to use your name as a reference for Grizzly customers in your area Note We never use ...

Page 38: ...D LINE FOLD ALONG DOTTED LINE GRIZZLY INDUSTRIAL INC P O BOX 2069 BELLINGHAM WA 98227 2069 Place Stamp Here Name_______________________________ Street_______________________________ City______________State______Zip______ Send a Grizzly Catalog to a friend ...

Page 39: ...e tried in the State of Washington County of Whatcom We shall in no event be liable for death injuries to persons or property or for incidental contingent special or consequential damages arising from the use of our products To take advantage of this warranty contact us by mail or phone and give us all the details We will then issue you a Return Number which must be clearly posted on the outside a...

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