Essential Safety Measures: Machine Guarding & Lockout/Tagout

Preventing workplace injuries isn’t just about compliance—it’s about protecting lives. Two of the most critical safeguards in industrial safety are machine guarding and lockout/tagout (LOTO). Together, they serve as frontline defenses against some of the most severe and preventable accidents.

This article explores the key requirements of machine guarding and LOTO, common pitfalls, and best practices to strengthen your safety program. Whether you're building your safety culture from the ground up or looking to refine it, understanding these two concepts is foundational.

Why Machine Guarding and Lockout/Tagout Matter

According to the Occupational Safety and Health Administration (OSHA), machine guarding ranks consistently among OSHA’s top 10 most cited violations. Similarly, Lockout/Tagout (29 CFR 1910.147) is one of the leading causes of citations and workplace incidents, especially in manufacturing and heavy industry.

Both types of controls are designed to prevent workers from coming into contact with moving parts, energized systems, or stored energy—hazards that can cause crushing injuries, amputations, electrocutions, and fatalities.

What is Machine Guarding?

Machine guarding involves physical barriers or devices that protect workers from hazardous moving parts during operation. These hazards can include rotating parts, flying chips, sparks, or pinch points.

Types of machine guards:

• Fixed guards – Permanent barriers that prevent access to dangerous areas.

• Interlocked guards – Shut off power when opened or removed.

• Adjustable guards – Can be positioned to fit different sizes of material.

• Self-adjusting guards – Automatically adjust to the size of the material being fed.

Examples of machines that require guarding:

• Power presses

• Conveyors

• Grinders

• Shears

• Saws

• Milling machines

OSHA’s machine guarding requirements are outlined in 29 CFR 1910 Subpart O.

What is Lockout/Tagout?

Lockout/Tagout (LOTO) refers to the procedures and devices used to ensure that machines are properly shut down and cannot be restarted while maintenance or servicing is being performed.

This is critical because hazardous energy—from electricity, hydraulics, pneumatics, or even gravity—can cause injury if unexpectedly released.

Key elements of an effective LOTO program:

• Written energy control procedures

• Authorized employee training

• Lockout/tagout devices (padlocks, tags, hasps)

• Periodic inspections of procedures

• Documentation of completed lockouts

The standard that governs LOTO is 29 CFR 1910.147, which outlines who must be trained, what procedures must be followed, and when they apply.

Real-World Compliance Challenges

Even well-intentioned companies face challenges implementing these safety measures. Common pitfalls include:

• Failing to train all affected employees – Only authorized individuals may perform LOTO, but others must still understand the hazards.

• Improper use of guards – Workers may bypass or remove guards for convenience if training and oversight are lacking.

• Missing written procedures – OSHA requires documentation for each machine or piece of equipment with a unique energy source.

• No periodic inspections – Annual reviews ensure procedures remain effective and relevant.

• Inadequate supervision – Safety controls must be reinforced by regular observation and correction of unsafe behaviors.

Best Practices for Safer Operations

Here are strategies to improve your machine guarding and lockout/tagout programs:

✅ Conduct a hazard assessment of all machinery
✅ Provide clear and repeated training for employees
✅ Use color-coded tags and locks for clarity
✅ Store LOTO kits near affected equipment
✅ Perform documented inspections annually or after incidents
✅ Encourage workers to report damaged or missing guards
✅ Include LOTO and guarding checks in your safety audits

You can also refer to NIOSH’s guarding guidelines for detailed diagrams and safety principles.

Final Thoughts

Machine guarding and lockout/tagout aren't just checkboxes on an audit—they’re safeguards that protect the people behind the processes. By reinforcing these safety measures, organizations can reduce serious injuries and maintain compliance with federal standards.

If you’re looking to assess your current procedures or improve how your team handles LOTO and machine safety, Sentry Road can help. Our training programs, hazard assessments, and audit support are built to help companies like yours stay ahead of risk.

👉 Learn more at sentryroad.com