Makita 4100NH2 Instruction Manual

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Contents

42. Keep your body positioned to either side of thewheel, but not in line with the wheel. KICKBACKcould cause the tool to jump backwards. (See"Causes and Operator Prevention of Kickback")3. Do not reach underneath the work. Do notattempt to remove cut material when wheel ismoving.CAUTION: Wheels coast after turn off.4. Always observe that the wheel has stoppedspinning before placing tool down on benchor floor. A coasting wheel will cause the tool towalk backwards, cutting whatever is in its path. Beaware of the time it takes for the wheel to stop afterswitch is released.5. NEVER hold piece being cut in your hands oracross your leg. It is important to support thework properly to minimize body exposure, wheelbinding, or loss of control.6. Hold tool by insulated gripping surfaces whenperforming an operation where the cutting toolmay contact hidden wiring or its own cord.Contact with a "live" wire will make exposed metalparts of the tool "live" and shock the operator.7. When ripping always use a rip fence orstraight edge guide. This improves the accuracyof cut and reduces the chance for wheel binding.8. Always use wheels with correct size and shape(diamond vs. round) arbor holes. Wheels that donot match the mounting hardware of the tool willrun eccentrically, causing loss of control.9. Never use damaged or incorrect wheelwashers or bolts. The wheel washers and boltwere specially designed for your tool, for optimumperformance and safety of operation.10. Causes and Operator Prevention of Kickback:Kickback is a sudden reaction to a pinched, bound,or misaligned wheel, causing an uncontrolled toolto lift up and out of the workpiece toward theoperator.When the wheel is pinched or bound tightly by thekerf closing down, the wheel stalls and the motorreaction drives the unit rapidly back toward theoperator.If the wheel becomes twisted or misaligned in thecut, the teeth at the back edge of the wheel can diginto the top surface of the material being cutcausing the wheel to climb out of the kerf and jumpback toward the operator.Kickback is the result of tool misuse and/orincorrect operating procedures or conditions andcan be avoided by taking proper precautions asgiven below:Maintain a firm grip on the tool and positionyour body and arm to allow you to resistKICKBACK forces. KICKBACK forces can becontrolled by the operator, if proper precautions aretaken.When wheel is binding, or when interrupting acut for any reason, release the trigger and holdthe tool motionless in the material until thewheel comes to a complete stop. Never attemptto remove the tool from the work or pull thetool backward while the wheel is in motion orKICKBACK may occur. Investigate and takecorrective actions to eliminate the cause of wheelbinding.When restarting a tool in the workpiece, centerthe wheel in the kerf and check that teeth arenot engaged into the material. If wheel is binding,it may walk up or KICKBACK from the workpiece asthe tool is restarted.Support large panels to minimize the risk ofwheel pinching and KICKBACK. Large panelstend to sag under their own weight. Supports mustbe placed under the panel on both sides, near theline of cut and near the edge of the panel.To minimize the risk of blade pinching and kickback.When cutting operation requires the resting of thetool on the workpiece, the tool should be rested onthe larger portion and the smaller piece cut off.Do not use dull or damaged wheel.Unsharpened or improperly set wheels producenarrow kerf causing excessive friction, wheelbinding and KICKBACK.Wheel depth and bevel adjusting locking leversmust be tight and secure before making cut. Ifwheel adjustment shifts while cutting, it may causebinding and KICKBACK.Use extra caution when making a "Pocket Cut"into existing walls or other blind areas. Theprotruding wheel may cut objects that can causeKICKBACK.NEVER place your hand or fingers behind thetool. If kickback occurs, the tool could easily jumpbackwards over your hand, leading to seriouspersonal injury.11. When operating the tool, keep the cord awayfrom the cutting area and position it so that itwill not be caught on the workpiece during thecutting operation. Operate with proper handsupport, proper workpiece support, andsupply cord routing away from the work area.WARNING: It is important to support theworkpiece properly and to hold the tool firmlyto prevent loss of control which could causepersonal injury.12. Use only diamond wheels. NEVER use toolwith wood cutting blades or other sawblades.Such blades when used on this tool frequentlykick and cause loss of control leading to