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It represents our effort to produce the best documentation possible. The specifications, details, and photographs in this manual represent the Model H0777 as supplied when the manual was prepared. However, owing to Grizzly’s policy of continuous improvement, changes may be made at any time with no obligation on the part of Grizzly. If you have any comments regarding this manual, please write to us at the address below: Grizzly Industrial, Inc. C/O Technical Documentation P.O. Box 2069 Bellingham, WA 98227-2069 Most importantly, we stand behind our tools. If you have any service questions or parts requests, please call or write us at the location listed below. Grizzly Industrial, Inc. 2406 Reach Road Williamsport, PA 17701 Phone: (570) 546-9663 Fax: (800) 438-5901 E-Mail: techsupport@grizzly.com Web Site: To operate this, or any power tool, safely and efficiently, it is essential to become as familiar with its characteristics as possible. The time you invest before you begin to use your Model H0777 will be time well spent. DO NOT operate this machine until you are competely familiar with the contents of this manual. Make sure you read and understand all of the safety procedures. If you do not understand something, DO NOT operate the machine. H0777 Heavy-Duty 1.2" Electric Drill -3 OPERATIONS Changing Bits 1. Remove the chuck key from the holder on the power cord. 2. Insert the chuck key into one of the three holes located on the side of the chuck. 3. Turn the chuck key counterclockwise. This will cause the three chuck jaws to open. When the chuck jaws are at the approximate diameter of the bit or driver, insert the shank end of the bit or driver into the jaw opening. 5. Turn the chuck key clockwise until the jaws close tightly around the bit or driver. Never “power tighten” which is holding the chuck while running the drill. This can cause serious injury to the operator’s hands. Check for tightness periodically while using the tool. 6. To release the bit or driver, insert the chuck key and turn counter-clockwise. Operating this equipment has the potential to propel debris into the air which can cause eye injury. Always wear safety glasses or goggles when operating equipment. Be certain the safety glasses you wear meet the appropriate standards of the American National Standards Institute (ANSI). Operating this equipment has the potential for flying debris to cause eye injury. Always wear safety glasses or goggles when operating equipment. Everyday glasses or reading glasses only have impact resistant lenses, they are not safety glasses. Be certain the safety glasses you wear meet the appropriate standards of the American National Standards Institute (ANSI). Like all power tools, there is danger associated with the Model G9909. Accidents are frequently caused by lack of familiarity or failure to pay attention. Use this tool with respect and caution to lessen the possibility of operator injury. If normal safety precautions are overlooked or ignored, serious personal injury may occur. The Model H0777 was specifically designed for boring holes. DO NOT MODIFY AND/OR USE THIS MACHINE FOR ANY OTHER PURPOSE. Modifications or improper use of this tool will void the warranty. If you are confused about any aspect of this machine, DO NOT use it until you have answered all your questions. Serious personal injury may occur. -4- H0777 Heavy-Duty 1.2" Electric Drill MAINTENANCE Guidelines and Tips Regular periodic maintenance on your Model H0777 Heavy-Duty 1.2" Electric Drill will ensure its optimum performance. Make a habit of inspecting your drill each time you use it. Avoid overloading the drill. Always use sharpened drill bits. Do not apply excessive pressure to the drill while using. If the speed drops abnormally, decrease pressure immediately. If the bit stops abruptly or becomes blocked, release the trigger at once. Ensure the safety of the workplace. Clear the work area of all parts and debris that may cause injury by flying objects. Securely fix the object to be drilled or fastened in a vise or otherwise clamp to avoid injury. Do not attempt to hold workpiece by hand. Inspect the drill before use. Run the drill before using to ensure all parts are running smoothly and there are no abnormal sounds or sparks. If any defect is found, have unit serviced. Know your worksite. Only drill as deep as necessary. Check behind walls for wires, other electrical hazards, or plumbing. Maintenance Continuous use of a worn or damaged bit will not only decrease working efficiency, but also overload the motor, so the bit must be frequently checked. Replace the bit if it is worn or damaged. Periodically check all screws to be sure they are tight. If any screw is loose, tighten immediately. Regularly clean your drill and make sure that no dust or grime builds up in the motor ventilation holes. If these holes become blocked, the motor will wear down faster than necessary. A good way to clean ventilation holes is t...