Page 3 - Table of Contents
Table of Contents INTRODUCTION ............................................... 2 Contact Info.................................................... 2Machine Differences ...................................... 2Manual Accuracy ........................................... 2Identification ....................
Page 4 - INTRODUCTION; Manual Accuracy; Contact Info
-2- Model G0939/G0940 (Mfd. Since 12/20) INTRODUCTION We are proud to provide a high-quality owner’s manual with your new machine! We made every effort to be exact with the instruc-tions, specifications, drawings, and photographs in this manual. Sometimes we make mistakes, but our policy of continuo...
Page 5 - Identification
Model G0939/G0940 (Mfd. Since 12/20) -3- Identification To reduce your risk of serious injury, read this entire manual BEFORE using machine. Become familiar with the names and locations of the controls and features shown below to better understand the instructions in this manual. Table Return Roller...
Page 6 - Components
-4- Model G0939/G0940 (Mfd. Since 12/20) Controls & Components Refer to Figures 1–3 and the following descrip- tions to become familiar with the basic controls of this machine. To reduce your risk of serious injury, read this entire manual BEFORE using machine. A. ON/OFF Switch: Turns motor ON w...
Page 7 - Internal Components
Model G0939/G0940 (Mfd. Since 12/20) -5- Internal Components A. Infeed Roller: Rotates with the direction of feed to pull the workpiece toward the cutterhead. B. Chip Breaker: Breaks off chips created by the cutterhead to prevent tear out and diverts the chips to the dust port. C. Cutterhead: Holds ...
Page 10 - HELICAL CUTTERHEAD
-8- Model G0939/G0940 (Mfd. Since 12/20) Machine Data Sheet (G0940) The information contained herein is deemed accurate as of 2/1/2021 and represents our most recent product specifications. Due to our ongoing improvement efforts, this information may not accurately describe items previously purchase...
Page 12 - NOTICE; Safety Instructions for Machinery
-10- Model G0939/G0940 (Mfd. Since 12/20) ELECTRICAL EQUIPMENT INJURY RISKS. You can be shocked, burned, or killed by touching live electrical components or improperly grounded machinery. To reduce this risk, only allow qualified service personnel to do electrical installation or repair work, and al...
Page 14 - Additional Safety for Planers
-12- Model G0939/G0940 (Mfd. Since 12/20) Additional Safety for Planers Amputation, serious cuts, entanglement, or death can occur from contact with rotating cutterhead or other moving parts! Flying chips can cause eye injuries or blindness. Workpieces or knives thrown by cutterhead can strike nearb...
Page 15 - SECTION 2: POWER SUPPLY; Availability
Model G0939/G0940 (Mfd. Since 12/20) -13- SECTION 2: POWER SUPPLY Availability Before installing the machine, consider the avail-ability and proximity of the required power supply circuit. If an existing circuit does not meet the requirements for this machine, a new circuit must be installed. To min...
Page 17 - Unpacking; Inventory
Model G0939/G0940 (Mfd. Since 12/20) -15- SECTION 3: SETUP This machine was carefully packaged for safe transport. When unpacking, separate all enclosed items from packaging materials and inspect them for shipping damage. If items are damaged, please call us immediately at (570) 546-9663. IMPORTANT:...
Page 18 - Hardware Recognition Chart
-16- Model G0939/G0940 (Mfd. Since 12/20) Hardware Recognition Chart USE THIS CHART TO MATCH UPHARDWARE DURING THE INVENTORYAND ASSEMBLY PROCESS. 5mm 5 mm Flat Head Cap Screw
Page 19 - Workbench Load; Placement Location; Site Considerations
Model G0939/G0940 (Mfd. Since 12/20) -17- Figure 7. Minimum working clearances. 25 1 / 2 " 28" = Electrical Connection Children and visitors may be seriously injured if unsuper- vised around this machine. Lock entrances to the shop or disable start switch or power connection to prevent unsup...
Page 21 - Dust Collection; Test Run
Model G0939/G0940 (Mfd. Since 12/20) -19- Dust Collection To connect a dust collection hose: 1. Fit 2 " dust hose over dust port and secure with hose clamp (see Figure 12). Recommended CFM at Dust Port: 150 CFMDo not confuse this CFM recommendation with the rating of the dust collector. To deter...
Page 23 - SECTION 4: OPERATIONS; Operation Overview
Model G0939/G0940 (Mfd. Since 12/20) -21- SECTION 4: OPERATIONS Operation Overview The purpose of this overview is to provide the nov-ice machine operator with a basic understanding of how the machine is used during operation, so the machine controls/components discussed later in this manual are eas...
Page 25 - Planing Tips; Chipped Grain; Cutting Problems
Model G0939/G0940 (Mfd. Since 12/20) -23- Planing Tips Below is a list of wood characteristics you may encounter when planing. The following descrip-tions of defects will give you some possible answers to problems you may encounter while planing different materials. Possible solutions fol-low the de...
Page 26 - Chip Marks or Indentations; Rippled Cut; Setting Depth of Cut
-24- Model G0939/G0940 (Mfd. Since 12/20) 1 ⁄ 4 Turn = 1 ⁄ 64 " 1 ⁄ 2 Turn = 1 ⁄ 32 " 3 ⁄ 4 Turn = 3 ⁄ 64 " 1 Turn = 1 ⁄ 16 " Down Up Figure 15. Crank elevation increments. Pitch & Glue Build-up Problem: Glue and resin buildup on the rollers and cutterhead will cause overheating ...
Page 27 - Feeding Workpiece; Elevation Scale
Model G0939/G0940 (Mfd. Since 12/20) -25- Feeding Workpiece The feed rate on this planer is automatically set at 25 FPM. Infeed and outfeed rollers move the workpiece through the planer while keeping it firmly against the table and providing a consistent rate of movement. To feed workpiece into plan...
Page 28 - Adjusting Table
-26- Model G0939/G0940 (Mfd. Since 12/20) 3. Rotate cutterhead elevation crank ¼ turn clockwise to raise cutterhead approximately 1 ⁄ 64 ". This will set depth of cut to 1 ⁄ 32 ". Remove workpiece from planer. 4. Turn planer ON. 5. Feed workpiece into front of planer, making sure not to stan...
Page 29 - Adjusting /Replacing; Removing Knives
Model G0939/G0940 (Mfd. Since 12/20) -27- To reduce risk of shock or accidental startup, always disconnect machine from power before adjustments, maintenance, or service. Adjusting /Replacing Knives (G0939) The condition of the knives on the Model G0939 will affect the precision of the cut. During o...
Page 31 - Installing Knives
Model G0939/G0940 (Mfd. Since 12/20) -29- 3. Install gib over knife, and slightly tighten gib screws, starting at middle and working your way to ends by alternating left and right, as shown in Figure 25. 4. Press safety latch to disengage cutterhead lock (see Figure 23), then carefully rotate cutter...
Page 32 - Cutterhead Inserts
-30- Model G0939/G0940 (Mfd. Since 12/20) Figure 26. Insert rotating sequence. The helical cutterhead is equipped with indexable carbide inserts that can be rotated to reveal any one of their four cutting edges. If one edge of the insert becomes dull or damaged, simply rotate it 90° to reveal a fres...
Page 33 - SECTION 5: ACCESSORIES; order online at; Basic Eye Protection
Model G0939/G0940 (Mfd. Since 12/20) -31- SECTION 5: ACCESSORIES Installing unapproved accessories may cause machine to malfunction, resulting in serious personal injury or machine damage. To reduce this risk, only install accessories recommended for this machine by Grizzly. NOTICE Refer to our webs...
Page 34 - SECTION 6: MAINTENANCE; Schedule; Elevation Leadscrews & Columns
-32- Model G0939/G0940 (Mfd. Since 12/20) SECTION 6: MAINTENANCE For optimum performance from your machine, follow this maintenance schedule and refer to any specific instructions given in this section. OngoingTo maintain a low risk of injury and proper machine operation, if you ever observe any of ...
Page 36 - Outfeed Rollers
-34- Model G0939/G0940 (Mfd. Since 12/20) Replacing Motor Brushes To clean infeed & outfeed rollers: 1. DISCONNECT MACHINE FROM POWER! 2. Raise headstock completely to expose infeed and outfeed rollers (see Figure 36). 3. Clean rubber infeed and outfeed rollers with solvent to remove any pitch o...
Page 38 - Replacing Drive Belt
-36- Model G0939/G0940 (Mfd. Since 12/20) Tensioning / Replacing Drive Belt The drive belt transfers power from the motor to the cutterhead, and to the infeed and outfeed roll-ers. To ensure efficient transfer of power to these systems, make sure the belt is always properly tensioned and in good con...
Page 39 - Troubleshooting
Model G0939/G0940 (Mfd. Since 12/20) -37- Review the troubleshooting procedures in this section if a problem develops with your machine. If you need replacement parts or additional help with a procedure, call our Technical Support. Note: Please gather the serial number and manufacture date of your m...
Page 40 - Machine Operation
-38- Model G0939/G0940 (Mfd. Since 12/20) Machine Operation Symptom Possible Cause Possible Solution Excessive snipe (gouge at the end of the workpiece that is uneven with the rest of the cut). Note: A small amount of snipe is inevitable with all types of planers—the key is to minimize it. 1. Table ...
Page 41 - Adjusting Cutterhead/
Model G0939/G0940 (Mfd. Since 12/20) -39- Calibrating Headstock Elevation Scale Although correctly set at the factory, the scale can be adjusted for accuracy if it becomes necessary. Tools Needed Qty Phillips Screwdriver #2 ...................................... 1Scrap Piece of Stock ..................
Page 45 - Wiring Safety Instructions
Model G0939/G0940 (Mfd. Since 12/20) -43- Wiring Safety Instructions SHOCK HAZARD. Working on wiring that is con-nected to a power source is extremely dangerous. Touching electrified parts will result in personal injury including but not limited to severe burns, electrocution, or death. Disconnect t...
Page 46 - Wiring Diagram
-44- Model G0939/G0940 (Mfd. Since 12/20) Wiring Diagram Figure 46. Switch and circuit breaker wiring. Neutral Hot Ground 120 VAC 5-15 Plug PADDLE SWITCH BOX 120V Motor Ground PADDLE SWITCH COVER Circuit Breaker Zhongzui 15A 125/250V Ground Paddle Switch KEDU HY18 12A 125/250V 1 2 5 4
