12 Aug Grinding – JSA

Grinding Job Safety Analysis (JSA)

Job / Task

Use of portable and stationary grinders for grinding, shaping, deburring, cutting, sharpening, or finishing metal and other materials.

Purpose

This Job Safety Analysis (JSA), also known as a Job Hazard Analysis (JHA), identifies hazards associated with grinding operations and establishes controls to prevent flying particles, wheel failure, cuts, burns, kickback, electric shock, noise exposure, fire, and other injuries.

Personnel Qualifications

Employees shall be trained and competent to operate the specific grinder and understand the tool manufacturer’s instructions, limitations, hazards, and required controls.

Employees shall:

• Select the correct grinder, wheel, disc, and accessory for the task and material.
• Inspect the grinder and abrasive wheel before use.
• Use guards, handles, rests, and other required protective devices.
• Operate the grinder according to manufacturer instructions.
• Maintain stable footing and control of the tool.
• Wear required PPE.
• Stop work and remove defective equipment from service.

Required PPE

PPE shall be selected based on the grinding operation and may include:

• Safety glasses with side protection.
• Face shield worn over safety glasses when exposed to flying particles or sparks.
• Hearing protection where noise exposure warrants it.
• Safety footwear appropriate to the work.
• Appropriate work gloves when they do not create an entanglement hazard.
• Flame-resistant clothing where sparks or hot metal create a burn or fire hazard.
• Respiratory protection when required by the hazard assessment and applicable respiratory protection program.

PPE does not replace required machine guards, work practices, ventilation, or other engineering controls.

JSA – Job Steps, Hazards, and Controls

Step 1 – Select the Correct Grinder and Abrasive Wheel

Potential Hazards

• Wheel or disc failure.
• Kickback.
• Loss of control.
• Grinding wheel used outside its intended application.
• Excessive speed.

Required Controls

• Select a grinder appropriate for the task and material.
• Use only wheels, discs, and accessories designed for the specific grinder.
• Verify the wheel or accessory is rated for the grinder’s operating speed.
• Match the wheel type to the material and operation.
• Do not use a wheel that is cracked, chipped, damaged, or otherwise defective.
• Follow manufacturer recommendations for wheel selection and use.

Step 2 – Inspect the Grinder and Work Area

Potential Hazards

• Damaged electrical components.
• Missing guards.
• Loose components.
• Trips and falls.
• Fire hazards.

Required Controls

• Inspect the grinder, power cord, plug, switch, guard, handles, spindle, and other components before use.
• Remove damaged equipment from service and identify it to prevent use.
• Keep the work area clean, dry, well lit, and free of unnecessary materials.
• Route cords and hoses to minimize trip hazards and protect them from damage.
• Remove or protect combustible materials when sparks are produced.
• Provide adequate ventilation when dust or fumes may be generated.

Step 3 – Inspect and Install the Grinding Wheel or Disc

Potential Hazards

• Wheel breakage.
• Flying fragments.
• Incorrect installation.
• Pinch points.
• Unexpected startup.

Required Controls

• Inspect the wheel or disc for cracks, chips, damage, or other defects before installation.
• Use the correct wheel, flange, backing, and accessory for the grinder.
• Install accessories according to manufacturer instructions.
• Ensure the wheel is properly seated and secured.
• Disconnect the grinder from its energy source before changing wheels or accessories.
• Do not force a wheel onto a spindle or alter a wheel to make it fit.
• Where applicable, allow newly installed wheels to run at operating speed in a protected position before beginning work, following manufacturer requirements.

Step 4 – Set Up Guards and Work Supports

Potential Hazards

• Contact with the rotating wheel.
• Wheel fragments.
• Loss of workpiece control.
• Pinch points.

Required Controls

• Keep required wheel guards installed and properly adjusted.
• Use tool rests and work supports on stationary grinders as required.
• Maintain required clearances between the wheel and tool rest according to manufacturer instructions and applicable requirements.
• Position guards to provide maximum practical protection from the wheel and workpiece.
• Do not operate a grinder with a missing, damaged, or improperly adjusted guard.

Step 5 – Secure and Position the Workpiece

Potential Hazards

• Workpiece movement.
• Pinched fingers.
• Kickback.
• Loss of balance.
• Flying debris.

Required Controls

• Secure small or unstable workpieces using clamps, fixtures, or other suitable methods.
• Do not hold a small workpiece in a manner that places hands in the wheel path.
• Maintain stable footing and a balanced working position.
• Position the workpiece so sparks and debris are directed away from people and hazards.
• Keep hands and body parts out of the line of fire.

Step 6 – Start and Operate the Grinder

Potential Hazards

• kickback.
• Wheel breakage.
• Flying particles.
• Loss of control.
• Electric shock.
• Burns.

Required Controls

• Position yourself to the side of the wheel rather than directly in line with the wheel when practical.
• Maintain a firm grip and stable stance.
• Allow the grinder to reach operating speed before applying it to the work, when appropriate.
• Apply the wheel gradually and avoid excessive pressure.
• Do not twist, bind, or force the wheel.
• Keep both hands on the tool when the tool design requires it.
• Do not use the side of a wheel unless the wheel is specifically designed for side grinding.
• Keep the grinder under control throughout the operation.

Step 7 – Control Sparks, Dust, and Hot Materials

Potential Hazards

• Fire.
• Burns.
• Eye injuries.
• Respiratory exposure.
• Explosion in combustible atmospheres.

Required Controls

• Identify combustible, flammable, and dust hazards before grinding.
• Remove or protect combustible materials from sparks and hot debris.
• Use spark containment or barriers when necessary.
• Provide adequate ventilation and dust collection when appropriate.
• Do not grind in a potentially explosive atmosphere unless the operation has been specifically evaluated and controlled.
• Handle hot workpieces with appropriate tools and PPE.
• Allow hot materials to cool in a safe location.

Step 8 – Maintain Safe Separation from Others

Potential Hazards

• Flying particles.
• Sparks
• Noise.
• Struck-by injuries.

Required Controls

• Keep unnecessary personnel out of the grinding area.
• Use barriers, screens, or other controls to protect nearby workers.
• Position screens to contain sparks and particles without creating additional hazards.
• Do not direct sparks or debris toward another person.
• Coordinate grinding activities with nearby work.

Step 9 – Stop, Inspect, and Adjust the Grinder

Potential Hazards

• Unexpected startup.
• Wheel contact.
• Cuts.
• Stored energy.
• Electrical shock.

Required Controls

• Turn off and disconnect or isolate the grinder before cleaning, adjusting, or changing accessories when required.
• Wait for the wheel to come to a complete stop before setting the tool down.
• Never attempt to stop a rotating wheel by hand or by contacting it with another object.
• Do not clear debris with hands near a rotating wheel.
• Inspect the grinder and wheel if unusual vibration, noise, or performance occurs.
• Remove defective equipment from service.

Step 10 – Complete the Work and Store Equipment

Potential Hazards

• Residual heat.
• Unintended startup.
• Fire.
• Damaged equipment.
• Trips.

Required Controls

• Turn off the grinder and disconnect it when appropriate.
• Allow the wheel to stop completely before leaving the work area.
• Inspect for hot particles or smoldering materials.
• Clean the work area using appropriate methods.
• Store grinders and accessories in a dry, protected location.
• Protect wheels and accessories from impact and contamination.
• Report damaged equipment or unsafe conditions.

Prohibited Practices

• Operate a grinder without the required guard.
• Use a cracked, chipped, damaged, or improperly rated wheel or disc.
• Use a wheel or accessory above its rated operating speed.
• Use an abrasive wheel for an application for which it was not designed.
• Remove, bypass, or disable required guards or safety devices.
• Force a wheel onto a spindle or modify a wheel to make it fit.
• Use the side of a wheel unless it is specifically designed for side grinding.
• Grind in a flammable or explosive atmosphere without appropriate evaluation and controls.
• Direct sparks, particles, or debris toward another person.
• Attempt to stop a rotating wheel by hand.
• Leave a running grinder unattended.
• Use damaged electrical cords, plugs, switches, or other defective equipment.

Emergency Procedures

In the event of wheel failure, fire, electric shock, serious injury, or another grinding emergency:

1. Stop the grinder and isolate its energy source when it is safe to do so.
2. Warn employees in the immediate area and keep personnel away from the hazard.
3. Do not approach a failed or damaged wheel until all rotating components have stopped.
4. Obtain emergency assistance when necessary.
5. Provide first aid within the limits of training.
6. Use fire-extinguishing equipment only when trained and it is safe to do so.
7. Remove damaged equipment from service.
8. Report the incident or near miss according to established procedures.
9. Do not resume work until the cause has been evaluated and appropriate controls are in place.

Training Requirements

Employees who operate grinders shall receive training appropriate to the grinder, abrasive products, materials, and hazards involved.

Training shall address:

• Tool and wheel selection.
• Pre-use inspection.
• Wheel installation and compatibility.
• Guards and protective devices.
• Kickback and wheel-breakage hazards.
• Safe operating techniques.
• Sparks, fire, dust, fumes, and noise controls.
• Required PPE.
• Emergency procedures and incident reporting.

Additional training shall be provided when employees are assigned new equipment or processes, demonstrate unsafe practices, or when changes in conditions create new hazards.

JSA Review

This JSA shall be reviewed with affected employees before work begins.

The JSA shall be revised or supplemented when:

• A new grinder, wheel, disc, or accessory is introduced.
• The work process or material changes.
• New hazards are identified.
• An incident or near miss occurs.
• Existing controls are ineffective.
• Employees identify additional hazards.
• Work conditions change in a manner that affects grinding safety.