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Basic Safety On The Use Of Die Grinders
Principal Author / Publisher:Safetyhow Admin
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Die grinders perform a wide variety of jobs, typically in a confined space. Die grinders are a special version of end grinders to be used with mounted wheels or accessories 2” or less in diameter. Due to the small accessory diameters, die grinders are designed to work without a guard, therefore requiring a special attention while operating. You must have athorough understanding of all procedures for each job you perform.
Good Personal Safety is a Must
Following good safety practices when using a die grinder is a must. Make a habit of including safety in all your
activities. Always read and understand the tool’s operator’s manual, tool markings and the instructions packaged with the accessory before starting any work. Always wear safety goggles or safety glasses with side shields complying with current national standards, and a full face shield when needed. Use the appropriate mask or respirator in dusty work conditions.
Wear proper hearing protection, as needed.
• Dress right. Do not wear loose clothes or jewelry. Contain long hair. Loose clothes, jewelry, or long hair can be caught in moving parts.
• Crowded, cluttered work areas that can cause tripping or loss of balance are particularly dangerous.
• Never alter a guard or use the tool with a guard missing. Be sure all guards are in place and working properly before each use. Do not defeat guards.
• Do not operate the power tool near flammable materials. Sparks could ignite these materials.
Choose the Right Tool and Accessory
Choosing the correct tool and the proper accessory for your application can help to reduce the risk of serious injury. When used according to the manufacturer’s instructions, the proper tool and accessory will do the job safer and faster.
• Use the correct accessory for your tool. Check this carefully: Does it fit the spindle of the tool. Accessories with spindles that do not match the tool will wobble and vibrate and may cause loss of control.
• Some die grinders are designed to be used with wheel types that may require different guards. Follow the tool and accessory manufacturers’ instructions for selecting guards and grinding wheels. Just because an accessory can be attached to a tool, does not mean it is safe to do so. • Accessories must be used only for recommended jobs. For example: do not grind with the side of a cut-off wheel. It will shatter, causing a serious risk for injury.
• Be sure to properly secure all die grinder accessories that use a collet.
• Be careful not to over-tighten the spindle nut of the tool. Too much pressure will deform the flanges and stress the wheel.
Make sure the speed marked on the accessory is at least as high as the no load RPM marked on the tool. The wrong accessory can shatter during use, possibly causing injury.
Know your Workpiece
Take time to review your work piece and make sure that all necessary precautions have been taken before grinding.
• Use grinding wheels when working with hard materials – such as steel. Use rotary cutters for soft materials – such as aluminum, brass, copper and wood. If you use wheels on soft material, it will cause over loading, and could cause the wheel to shatter or disintegrate. Dangerous flying objects could result. Always place the work piece securely in a vise or clamp securely. Never make freehand cuts. Holding the work piece by hand is unstable and may lead to loss of control.
• Support panels or any oversized workpiece to minimize the risk of wheel pinching and kickback. Large workpieces tend to sag under their own weight. Supports must be placed under the workpiece near the line of cut and near the edge of the workpiece on both sides of the wheel.
Before Grinding...
Before working with a die grinder, make sure the tool and its accessories are in proper working order. Failure to do so may increase your risk of injury.
• Be sure the switch is in the “off” position before plugging it in.
• Do not use a tool if the switch does not turn it off when returned to the “off” position after release. Always unplug the grinder before making accessory installations.
When installing a mounted grinding wheel, burr or cutter in the collet, keep distance between the back of the wheel and the front of the collet (overhang) at a maximum of ½ inch. This prevents spindle bending and wheel damage
that could cause injury.
• Never use cracked or damaged accessories. Carefully check them before each use.
• Always check accessory for tightness on the tool before each use. A loose cutter or wheel can be thrown from the rotary grinder and can cause serious injury. If the grinder is dropped, inspect it for damage, such as a cracked accessory, broken collet, or bent mandrel. Repair or replace damaged parts to prevent further breakage and thrown objects.
• Never over-tighten a collet. It can damage the cutter or wheel. Allow new wheels to run for a minimum of 1 minute to check for proper balancing.
• For maximum control, hold the grinder firmly with both hands.
• Always hold the accessory end of the tool away from you and co-workers to prevent possible injuries.
• Die grinders operate at high speeds. To avoid injury, be very careful not to contact the accessory end or be hit by thrown objects.
• If the die grinder vibrates during use, stop immediately and check for the grinding points. Dull grinding points could force the collet out of the tool. Replace or sharpen the grinding accessory.
While Grinding...
• Too much pressure during use can bend or break the collet, mandrel, or accessory. If the grinder runs smoothly when not under load, but does not run smoothly under load, then too much pressure is being used.
• If the tool does not run smoothly when not under load, the accessory may be bent or out of balance.
Replace the accessory.
• Never use a rotary die grinder with the cutter pointing toward you. If the grinder should slip, the accessory could cause injury.
• Never hold the workpiece by hand. Keep your hands and fingers away from the working area. Contact with the cutter or wheel will cause injury.
• When stopping a cut, switch off the tool and hold the tool motionless until the accessory comes to a complete stop. Never attempt to remove a wheel from the cut while the wheel is in motion to avoid accidental contact. • Do not restart the cut in the work piece. Let the cutter or wheel reach full speed and then carefully re-enter the cut.
When Done...
Unplug, clean and store the tool in a safe, dry place after use. To avoid burns, wait before touching workpieces. Allow time to cool.
Always Remember...
• Store tools and accessories with care. Do not drop them or subject them to excessive heat, cold or humidity.
Good Personal Safety is a Must
Following good safety practices when using a die grinder is a must. Make a habit of including safety in all your
activities. Always read and understand the tool’s operator’s manual, tool markings and the instructions packaged with the accessory before starting any work. Always wear safety goggles or safety glasses with side shields complying with current national standards, and a full face shield when needed. Use the appropriate mask or respirator in dusty work conditions.
Wear proper hearing protection, as needed.
• Dress right. Do not wear loose clothes or jewelry. Contain long hair. Loose clothes, jewelry, or long hair can be caught in moving parts.
• Crowded, cluttered work areas that can cause tripping or loss of balance are particularly dangerous.
• Never alter a guard or use the tool with a guard missing. Be sure all guards are in place and working properly before each use. Do not defeat guards.
• Do not operate the power tool near flammable materials. Sparks could ignite these materials.
Choose the Right Tool and Accessory
Choosing the correct tool and the proper accessory for your application can help to reduce the risk of serious injury. When used according to the manufacturer’s instructions, the proper tool and accessory will do the job safer and faster.
• Use the correct accessory for your tool. Check this carefully: Does it fit the spindle of the tool. Accessories with spindles that do not match the tool will wobble and vibrate and may cause loss of control.
• Some die grinders are designed to be used with wheel types that may require different guards. Follow the tool and accessory manufacturers’ instructions for selecting guards and grinding wheels. Just because an accessory can be attached to a tool, does not mean it is safe to do so. • Accessories must be used only for recommended jobs. For example: do not grind with the side of a cut-off wheel. It will shatter, causing a serious risk for injury.
• Be sure to properly secure all die grinder accessories that use a collet.
• Be careful not to over-tighten the spindle nut of the tool. Too much pressure will deform the flanges and stress the wheel.
Make sure the speed marked on the accessory is at least as high as the no load RPM marked on the tool. The wrong accessory can shatter during use, possibly causing injury.
Know your Workpiece
Take time to review your work piece and make sure that all necessary precautions have been taken before grinding.
• Use grinding wheels when working with hard materials – such as steel. Use rotary cutters for soft materials – such as aluminum, brass, copper and wood. If you use wheels on soft material, it will cause over loading, and could cause the wheel to shatter or disintegrate. Dangerous flying objects could result. Always place the work piece securely in a vise or clamp securely. Never make freehand cuts. Holding the work piece by hand is unstable and may lead to loss of control.
• Support panels or any oversized workpiece to minimize the risk of wheel pinching and kickback. Large workpieces tend to sag under their own weight. Supports must be placed under the workpiece near the line of cut and near the edge of the workpiece on both sides of the wheel.
Before Grinding...
Before working with a die grinder, make sure the tool and its accessories are in proper working order. Failure to do so may increase your risk of injury.
• Be sure the switch is in the “off” position before plugging it in.
• Do not use a tool if the switch does not turn it off when returned to the “off” position after release. Always unplug the grinder before making accessory installations.
When installing a mounted grinding wheel, burr or cutter in the collet, keep distance between the back of the wheel and the front of the collet (overhang) at a maximum of ½ inch. This prevents spindle bending and wheel damage
that could cause injury.
• Never use cracked or damaged accessories. Carefully check them before each use.
• Always check accessory for tightness on the tool before each use. A loose cutter or wheel can be thrown from the rotary grinder and can cause serious injury. If the grinder is dropped, inspect it for damage, such as a cracked accessory, broken collet, or bent mandrel. Repair or replace damaged parts to prevent further breakage and thrown objects.
• Never over-tighten a collet. It can damage the cutter or wheel. Allow new wheels to run for a minimum of 1 minute to check for proper balancing.
• For maximum control, hold the grinder firmly with both hands.
• Always hold the accessory end of the tool away from you and co-workers to prevent possible injuries.
• Die grinders operate at high speeds. To avoid injury, be very careful not to contact the accessory end or be hit by thrown objects.
• If the die grinder vibrates during use, stop immediately and check for the grinding points. Dull grinding points could force the collet out of the tool. Replace or sharpen the grinding accessory.
While Grinding...
• Too much pressure during use can bend or break the collet, mandrel, or accessory. If the grinder runs smoothly when not under load, but does not run smoothly under load, then too much pressure is being used.
• If the tool does not run smoothly when not under load, the accessory may be bent or out of balance.
Replace the accessory.
• Never use a rotary die grinder with the cutter pointing toward you. If the grinder should slip, the accessory could cause injury.
• Never hold the workpiece by hand. Keep your hands and fingers away from the working area. Contact with the cutter or wheel will cause injury.
• When stopping a cut, switch off the tool and hold the tool motionless until the accessory comes to a complete stop. Never attempt to remove a wheel from the cut while the wheel is in motion to avoid accidental contact. • Do not restart the cut in the work piece. Let the cutter or wheel reach full speed and then carefully re-enter the cut.
When Done...
Unplug, clean and store the tool in a safe, dry place after use. To avoid burns, wait before touching workpieces. Allow time to cool.
Always Remember...
• Store tools and accessories with care. Do not drop them or subject them to excessive heat, cold or humidity.
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Videos
References
http://www.powertoolinstitute.com/pti_pdfs/PTI_Saf ... y.pdf
https://www.youtube.com/watch?v=YNaRSb_ojP0
https://www.youtube.com/watch?v=qTWnPzTLhrw
http://www.toolstop.co.uk/bosch-ggs-18-v-lin-18v-c ... 16805
http://www.metabo.com/Up-To-Date-Information.2024+ ... .html
https://www.youtube.com/watch?v=YNaRSb_ojP0
https://www.youtube.com/watch?v=qTWnPzTLhrw
http://www.toolstop.co.uk/bosch-ggs-18-v-lin-18v-c ... 16805
http://www.metabo.com/Up-To-Date-Information.2024+ ... .html
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