Abrasive wheels shall be used only on machines provided with safety guards as required in section 3577b. Special training is required before using the surface grinder. Whether you are an automotive collision or a mechanical repair shop. Do not use wheel if the speed is lower than the speed marked on the machine or if no speed is marked. Tool rests on bench or pedestal grinders shall be set no more than 116 inch from the wheel.
Safety instructions for cuttingoff wheels and grinding discs you have purchased a highquality product. Ask shop staff to demonstrate proper use of this tool. Bench grinding wheel supercedes date 10172005 issuing date 121820 1. Improperly adjusted work rests and tongues on bench grinders are the main reasons for the citation. Grinding machines are made in a variety of types and sizes, depending upon the class of work for which they are to be used. It is therefore essential that the fullest details of the type of grinding operation should be given to the manufacturer to enable the correct wheel to be supplied. Hence, it is essential to observe the following safety precautions, in order to use it safely, and thus avoid any injuries. These are used to calculate the most conservative safety factors that are required in order to protect the grinding machine operator from wheel burst. If there are any unusual vibrations or noises, do not use the wheel to grind.
Grindingcuttingdrilling of masonry, concrete, metal and other materials can. Bench grinder safety the osha standard for grinders,osha 29 cfr 1910. Angle grinders, also called side or disc grinders, are a handheld power tool used for cutting, grinding and. Few people realize that the grinding wheel in their workshop has the potential of becoming as deadly as a loaded gun without the safety catch on. Surpassing this rating risks not just wheel breakage but also the safety of shop personnel. Grinders, or tools that use abrasivegrinding wheels. For your own safety these recommendations should be observed by all users, in the interest of their own safety. Discs must be used only for recommended applications.
It is recommended that all personnel involved with grinding wheels. Grinding wheel safety great american insurance group. The standard length of the wheel spindle after mounting should be mm. Never exceed recommended depth of cut for grinding wheel or machine. During the test, keep yourself and your coworkers in a safe area. Grinding machines have some special safety precautions that must be observed. Occupational safety and health hazard awareness training for the construction, oil and gas, and landscaping industries west virginia university research corporation 2011. Be sure to follow the instructions below to ensure safe operation. Portable grinder safety in a recent incident at a san luis obispo county public school involving a hand held portable disc sander, an employee was injured when the cut off wheel unexpectedly disintegrated, sending pieces flying across the workshop. Ensure the wheel is properly gripped to prevent slippage, but do not tighten with excessive force.
Is the power cord including plug free of breaks andor other damage. Material safety data sheet for grinding wheels and bonded abrasives format by fepa as per eec directive 9155cee and rule iso st 11014 page 1 important notice bonded abrasives are inert products which do not create any risk when handled or stored. Watchers of this video will learn about safety protocol, and why gloves and other safety measures are so important when using a grinder. The wheel should be no more than 3 mm away from the work rest and 3 10 mm away from the adjustment piece.
Product and company identification product name bench grinding wheel product code 87563336 recommended use grinding chemical nature inorganic solid blend information on manufacturer emergency telephone number. American national standard safety code for the use, care. Consider disc size, arbor size, motor power, power source and. Follow carefully the instructions given in the machine handbook. Part of the be prepared to work safely series of video shorts and pocket cards from imca. It is important when cutting and grinding to ensure there is proper preparation and planning, that equipment is fit for use and that proper guards are in place. Safety and health topics machine guarding checklist for abrasive wheel equipment grinders. Grinding wheel safety rules ganoksin jewelry making. Barriers should be in place, correct ppe should be worn, and ensure you keep your footing and balance when using cutting and grinding tools. In these cases, the icons can be printed in two contrasting colors. Injuries from grinding wheels can be prevented by the use of eye protection, safe work practices and proper care and guarding of the grinding wheel.
To satisfy the training and competence requirements of those mounting and using grinding wheels in relation to the legal obligations placed on employers and employees under the puwer 1998. So here is an overview of some of the key things you need to do when installing an abrasive wheel onto. Dos and donts for grinding wheel safety rexcut abrasives. The chapter focuses on new grinding wheel designs that are used in processes such as creep freed and viper grinding in addition to plain, parallel sided grinding wheels.
What hazards are there when using a grinding wheel. The speed of the grinder must be compared to the speed marked on the wheel or package to make sure the machines speed is at or below the maximum operating speed of the wheel. Abrasive cup wheel safety requirements norton abrasives. Discs for which the power tool was not designed cannot be adequately guarded and are unsafe. Loss prevention safety topics grining weel safety loss prevention safety topics grinding wheel safety injuries from grinding wheels can be prevented by the use of eye protection, safe work practices and proper care and guarding of the grinding wheel. If the wheel is defective, improperly mounted or the wrong size and speed, this is the time it will usually fail. Because with use loses its cutting edge as the wheel embeded with the material that is. We named this book handbook of machining with grinding wheels because the borders between grinding and other operations such as superfinishing, lapping, polishing, and flat honing are no longer distinct. A grinding wheel is an expendable wheel that carries an abrasive compound on its periphery. We will cover more aspects of pedestal and bench grinder safety in other toolbox talks. Grantee materials by topic occupational safety and. If you follow safety rules, you can almost entirely. Never use force when clamping and do not make any changes to the grinding tool. Abrasive wheel machinery shall not be operated without the appropriate guards in place.
Safety its the smart thing to do georgia grinding wheel. It is the abrasive grinding wheel industry standard for the safety requirements for the use, care and protection of abrasive wheels and most abrasive wheel safety related questions can be found there. When starting a cold wheel, apply it to the work slowly until the wheel gradually warms up. This can stop a slicer wheel in less than 1 second and a grinding wheel in less than 2 seconds when the grinders switch is disengaged. In order to prevent the uncontrolled bursting of pieces of the grinding wheel due to its. Grinder safety a worker was using a handheld grinder fitted with a grinding stone. The abrasive wheel shattered, propelling fragments and the wheel guard itself some fifty feet. The safety guard shall be mounted so as to maintain proper alignment with the wheel, and the strength of the fastenings shall exceed the strength of the guard. Dont allow sparks from grinding to fly into combustible or flammable materials such as scraps or solvents. Handling and storage precautions for safe handling.
Grinding wheel safety injuries from grinding wheels can be prevented by the use of eye protection, safe work practices and proper care and guarding of the grinding wheel. This training dvd will show viewers how to properly use a grinder or abrasive wheel. The wheel is generally made from a matrix of coarse particles pressed and bonded together to form a solid, circular shape, various profiles and cross sections are. Do not tighten the clamping device or wheel flange too much. Use only tools that comply with the highest safety standards. The manufacturing process of some wheels may preclude the use of multicolor blotters and labels.
Safety instructions for cuttingoff wheels and grinding discs. Tool rests on bench or pedestal grinders shall be set no more than 1. Angle grinders, also called side or disc grinders, are a handheld power tool used for cutting, grinding and polishing. Most of the time, these injuries are caused by neglecting to observe proper safety procedures or inattention while the grinder is operating. For example, if a wheel has a safety glasses icon and a face shield icon, the face shield must be worn along with the safety glasses. The grinders guard was removed, as the stone was too large for the tool. Do not use recessed wheel flanges or flanges with recesses for grinding discs or cones. The reason for this is because one of the most common grinder accidents has to do with the. Grinding is the process of removing material by the cutting action of the countless hard and sharp abrasive particles of a revolving grinding wheel as they come in contact with the surface to be ground.
Each grinding abrasive wheel is covered by a wheel guard to increase the safety of the machine. A grinding wheel is a multitooth cutter made up of many hard particles known as abrasives which have. British standards can be obtained in pdf or hard copy formats from bsi. Other machines are designed so that the grinding is done on the. Safety and health topics machine guarding checklist. But in the meantime, does anybody have a question or comment about. Do not use wheel flanges with surfaces that are not free of foreign bodies e. Do not use at speeds greater than product was made to be used. This grinder and abrasive wheel safety training video will show your trainees the proper ways of handling these important pieces of machinery.
Examination, handling and storage of abrasive wheels 9. Grinding safety guidelines grand valley state university. How to dress a grinding wheel that is a compound of abrasive grains, silicon carbide, aluminium oxide of fine diamond particles, these are the cutting medium. The risk related to grinding tool fracture 25 m1 mass of broken piece of the grinding wheel, in kg, vc circumferential velocity of the grinding wheel, reduced in the center of a broken piece, in ms, xc the center of gravity of a broken piece of the grinding wheel, in mm. Grinding wheel safety rules by charles lewtonbrain. Reciprocating surface grinding machines generally have horizontal wheel spindles and mount straight or cylindertype grinding abrasive wheels. Once a wheel has been mounted, test the machine and wheel by running them under a workbench or in a steel drum for 60 seconds. When used on grinding machines they require specific actions to protect the operators. Selecting the correct wheel for the job is essential for safety. This is due to improperly adjusted work rests and tongues on bench grinders.
Minimizing this gap helps prevent the item you are grinding from becoming. Never fit a wheel which is loose or too tight on the flange. The following safety information is based in part on material contained in the ansi b7. Translated versions are continue reading grinding wheel safety.
Side of wheel do not grind on side of wheel unless designed for side grinding wheel grooves do not gouge wheel by grinding in one spot restrictions. What should you avoid when using bench and pedestal grinders. As the worker started to grind, the stone broke, and pieces of stone struck and injured him. Portable grinder injury portable grinder safety in a recent incident at a san luis obispo county public school involving a hand held portable disc sander, an employee was injured when the cut off wheel unexpectedly disintegrated, sending pieces flying across the workshop. How to use a wheel to cut off with an angle grinder. Important topics include personal protective equipment and machine guards. Align the outer flange correctly as shown in the fepa safety leaflets for cutting and grinding wheels for angle grinders tighten only with the tool supplied with the machine. Another safety feature available on grinders is a mechanical safety brake. If the operator loses control of the tool, this safety feature helps prevent a serious injury from happening by. This foreword is not a part of the american national standard safety code for the use, care and protection of abrasive wheels, b7. Eye and hand injuries represent the most common types of injuries caused by using a grinding wheel.
How to dress a grinding wheelto the best grinding wheel. Use a grinding wheel cover which covers at least one half of the grinding wheel at all times. If your business uses type 1 or type 27 grinding wheels, there are steps to take to keep you and your employees safe. Select the right rpm wheel for the grinder speed identify dangers of grinding in close proximity to unprotected workers ensure the grinder is the proper tool for the job convenience is not a sufficient reason. Machining with grinding wheels extends from highremoval rate processes into the domains of ultrahigh accuracy and superfinishing. In addition to the tight quality control standards, high performance, safety and durability more than 150,000 different. A grinding wheel may be dangerous if used for an application for which it is not intended. On some, the abrasive wheels are mounted so only the exposed flat side is used for grinding. Standard sizes and grades magnum abrasives offers a full range of standard grades and sizes to meet the requirements of most general cutting and grinding. Besides the safety instructions that you get from a tool manufacturer in the tool manual it may be necessary for you to write your own sets of rules up to keep you out of trouble.
However, when machines are used incorrectly or without caution, damage to the wheel can occur. They can be electric, gas powered, or pneumatic and come in a variety of sizes. The most common are injuries to the eyes from flying particles, hand and finger injuries and injuries caused by grinding wheel breakage. In fact, almost 1 in every 4 grinder accidents is fatal. Grinding safety grinding wheels are a safe tool when used as they are designed to be.
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