Ryobi BD4601G User Manual - Page 9

OPERATION WARNING: Do not allow familiarity with tools to make you careless. Remember that a careless fraction of a second is sufficient to inflict serious injury. WARNING: Always wear eye protection with side shields marked to comply with ANSI Z87.1. Failure to do so could result in objects being thrown into your eyes resulting in possible serious injury. WARNING: Do not use any attachments or accessories not recommended by the manufacturer of this tool. The use of attachments or accessories not recommended can result in serious personal injury. APPLICATIONS This product has been designed only for the purposes listed below:  Sharpening drill bits  Sharpening lawn mower blades  Sharpening chisels and flat screwdrivers LED LIGHT SWITCH See Figure 10, page 14. Use the LED light switch on top of the spark shield assembly to turn the lights on and off. BASIC OPERATION To be efficient and work as designed, your tools should be kept sharp. Dull tools can and will cause accidents. Bench grinders are ideal for sharpening tools such as chisels, scissors, etc., and for removing rust or corrosion. Grinders remove material rapidly so pressure is the key to efficient grinding. The proper way to sharpen a tool and avoid overheating is:  Keep the object in constant motion, moving it at an even pace.  Never force a tool against the grinding wheel.  Keep the tool cool by using a pan of water.  The grinding wheel should rotate "into" the object being sharpened. NOTE: Excessive pressure may damage the tool, cause the motor to overheat, and prematurely wear down the grinding wheel. WARNING: Excessive pressure on a cold wheel could cause the wheel to crack. USING COOLANT TRAY The coolant tray allows you to cool overheated workpieces. Fill tray half way with water or appropriate coolant. ON/OFF SWITCH See Figure 11, page 14. The Bench Grinder features a front access On/Off switch for convenience and safety. SHARPENING TWIST DRILL BITS See Figure 12, page 14. Drill bits are best sharpened on a sharpening jig (available at most hardware stores). Begin on one side of the point at the existing angle, then twist the bit while maintaining contact with the grinding surface. Sharpen only the tip. This technique requires considerable practice, so take your time and make a few "dry runs" first with the grinder off. Be sure to maintain the original cutting edge angle as this is important to the efficiency of your bits. One work rest has a V-groove angled to fit most drill bits. SHARPENING LAWN MOWER BLADES See Figure 13, page 14. Lawn mower blades are usually sharpened on only one edge and dressed up slightly on the other. Perform this sharpening process on both cutting ends of the blade. After sharpening, be sure to balance the blade by removing additional material. NOTICE: An unbalanced lawn mower blade may cause excessive vibration which will damage the lawn mower. SHARPENING CHISELS AND SCREWDRIVER BLADES See Figure 14, page 14. When sharpening chisels and screwdrivers, work rest should support the chisel at the correct angle against the wheel. 9 ­- English