In the United States, there is no single OSHA rule written specifically for industrial robots. A robot cell is still regulated through OSHA’s general workplace duties and applicable standards, while consensus standards provide the technical framework for designing, integrating and validating the system. OSHA itself says, “There are currently no specific OSHA standards for the robotics industry.”
For current industrial-robot design, the key international editions are ISO 10218-1:2025 for the robot and ISO 10218-2:2025 for integration and robot applications. In the United States, ANSI identifies ANSI/A3 R15.06-2025 as the national adoption of both parts. The applicable edition can change with jurisdiction, contract, machine type, process and installation date, so a safety review must begin with the actual robot application rather than the robot’s marketing label.
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What governs an industrial robot cell in the United States?
Robot safety is determined by the complete application: the robot, tooling, workpiece, process, controls, surrounding machinery, operating modes and every foreseeable way a person could approach or enter the hazard zone. A compliant robot by itself does not make an integrated cell safe.
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OSHA’s robotics materials explain that national consensus standards are useful guidance, but they are not automatically OSHA regulations. Employers must still meet applicable OSHA requirements, including duties related to machine guarding, hazardous energy, electrical safety, training and safe work practices. State plans, local rules, customer specifications, insurance requirements and contracts may add obligations.
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The current ISO editions also matter because OSHA reference pages and its technical manual still cite older 2011/2012 editions. Those page references should not be mistaken for the publication date of the current international standard. Before specifying a new cell or assessing an existing one, confirm which edition the authority having jurisdiction, customer or contract recognizes.
The main standards and what each one covers
| Standard or reference | Primary scope | How it fits a factory project |
|---|---|---|
| ISO 10218-1:2025 | Safety requirements for industrial robots themselves | Addresses the robot as partly completed machinery and points to Part 2 for integration and applications. |
| ISO 10218-2:2025 | Robot applications, robot cells and integration | Provides the application-level framework used to design and safeguard the installed system. |
| ANSI/A3 R15.06-2025 | U.S. national adoption of the paired 2025 ISO 10218 parts | Relevant to U.S. specifications and conformity work; verify the edition required for the project. |
| ISO/TS 15066:2016 and RIA TR R15.606-2016 | Collaborative-robot application guidance | Still referenced by OSHA materials, although much of the ISO/TS 15066 material for collaborative applications has been incorporated into ISO 10218-2:2025. |
| ANSI/ISO 12100 | Machinery risk assessment and risk reduction | Provides the general method for identifying hazards, estimating risk and selecting protective measures. |
| RIA TR R15.306 | Task-based risk assessment | Helps evaluate the actual work people perform around the robot, including non-routine work. |
| ANSI B11.0 and ANSI B11.20 | Machinery safety and integrated manufacturing systems | May apply to the machine and the way the robot is integrated into a manufacturing system. |
| ISO 13849-1 and ISO 13849-2 | Safety-related control systems | Relevant when evaluating the design and validation of safety functions such as interlocks and safe stops. |
| ISO/TR 20218-1 | Industrial-robot end-effectors | Addresses hazards created by grippers, tools and other equipment attached to the robot. |
| ISO/TR 20218-2 | Manual load and unload stations | Relevant where employees manually place or remove parts at a robot application. |
| AWS D16.1M/D16.1 | Robotic arc-welding safety | Applies additional process-specific considerations to robotic welding installations. |
| CSA Z434 | Canadian industrial-robot safety | May be the relevant framework for a Canadian facility rather than a U.S. OSHA-based project. |
These references do not all apply to every installation. A welding cell, palletizing system, machine-tending application and mobile robot may have different hazards and additional standards. ISO 10218 is written for industrial robots; it does not apply to non-industrial robots, although its safety principles may be useful in some other domains.
Why a “collaborative” robot does not remove the need for guarding
A collaborative robot, or cobot, is a robot application designed to permit certain forms of human interaction under controlled conditions. The word does not guarantee that a person can safely stand anywhere near the machine during every operation.
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Collaboration depends on the complete task. A normally low-force robot can become hazardous when fitted with a sharp tool, a heavy workpiece, a high-temperature part, a pneumatic gripper or a fixture that creates a pinch point. Stored energy, unexpected restarts, dropped loads and the surrounding machinery can remain dangerous even when the robot limits its own speed or force.
ISO/TS 15066 and the collaborative material incorporated into ISO 10218-2:2025 address methods such as safety-rated monitored stop, hand guiding, speed-and-separation monitoring, and power-and-force limiting. The appropriate method depends on the hazard analysis. For a power-and-force-limited application, permissible contact conditions must be determined for the actual robot, tooling, workpiece, posture, speed and task; a factory cannot establish safety merely by selecting a product marketed as collaborative.
How to perform the application risk assessment
The assessment should be documented before commissioning and updated when the cell, tooling, software, process or work pattern changes. The integrator normally performs the technical assessment and provides it to the employer, but the employer remains responsible for verifying that the installed system is safe for its workplace.
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- Define the application. Record the robot model and reach, payload, speed, axes, controller, tooling, workpieces, fixtures, conveyors, nearby machines and the intended production rate. Treat the robot and cell as one system rather than assessing the arm in isolation.
- Map the work envelope. Identify the maximum reach, tool center point, payload path, pinch and crush zones, dropped-object areas, ejection paths and places where a person could be trapped. Include spaces behind, beneath and between equipment that may be overlooked during normal operation.
- List every operating mode. Assess automatic production, manual loading, setup, teaching, programming, testing, adjustment, cleaning, maintenance, repair and recovery from a fault. A safeguard that works in automatic mode may be unsuitable when a technician must enter the cell.
- Identify foreseeable misuse. Consider bypassed interlocks, reaching through openings, climbing over barriers, unexpected restart, a misaligned part, a failed sensor, a dropped load, a change in product, and a worker attempting to clear a jam without following the procedure.
- Involve affected workers. Operators, maintenance personnel, programmers and supervisors understand real access patterns and non-routine tasks. OSHA recommends that employers and affected workers participate rather than leaving the assessment solely to an equipment designer.
- Estimate and reduce risk. Select measures that eliminate hazards where possible, then use engineering safeguards, administrative controls and training for remaining risk. Document why each measure is appropriate for the task and how it is validated.
- Verify the residual risk. Test protective devices under realistic conditions, confirm that safety functions fail safely, and check that procedures match the installed controls. Repeat the review after modifications, incidents or changes in the work process.
Choosing safeguards for people who work near the robot
Physical barriers and interlocked gates
Fences, fixed guards and interlocked access doors prevent people from entering the hazardous area during automatic operation. The design must account for reach-through, climbing, crawling under a barrier, bypassing an interlock and access from adjacent equipment. An interlock should place the system in its defined safe state when the gate opens and should not allow an automatic restart simply because the gate is closed.
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Light curtains, scanners, mats and other presence-sensing devices can detect entry and command a stop or a safe operating mode. Their location, detection capability, stopping distance and reset arrangement must be matched to the robot’s residual motion and the person’s possible approach path. A sensor that detects a person but allows the tool to coast into the hazard does not provide adequate protection.
Safe stops and monitored motion
Safety-rated monitored stop, reduced-speed modes and enabling devices can allow controlled setup or teaching. The assessment must define who may select the mode, what speed and motion are permitted, how selection is protected against unauthorized changes, and what happens if a control or communication signal fails.
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Speed-and-separation monitoring
This method maintains a calculated separation between a person and the moving robot. It requires reliable detection of the person, a validated stopping response and consideration of the robot’s maximum speed, stopping time, reach and tool hazard. It is not a substitute for assessing areas that the detection system cannot see.
Power-and-force limiting
Power-and-force limiting can reduce injury risk during specified contacts, but the limits must be evaluated for the complete application. Tool geometry, impact energy, clamping action, workpiece mass, contact location and body region all matter. A force limit in the robot controller does not control a sharp edge, a hot part or a separate machine.
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Many cells need more than one measure: a guarded automatic area, a scanner at a loading point, a safe-speed teaching mode and lockout procedures for maintenance. The correct combination follows from the hazards and tasks, not from a universal rule that every robot requires either a cage or open collaboration.
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Requirements for setup, maintenance and fault recovery
Non-routine work is where workers may enter the robot’s envelope, defeat normal production assumptions or face stored energy. OSHA’s manufacturing robotics review published in 2024 reported that many acute injuries in its narrative material occurred during cleaning and maintenance. That is a qualitative observation, not an injury rate or a measure of the safety performance of all robot systems.
- Hazardous-energy control: Apply the employer’s equipment-specific lockout/tagout program to electrical, pneumatic, hydraulic, mechanical, gravity, thermal and other energy sources. A commercially available lockout/tagout kit can support the work, but it cannot replace an energy-control procedure, training or verification of zero energy.
- Access authorization: Define who may enter the cell, under which operating mode, with what personal protective equipment and with what supervision or permit.
- Teach and programming controls: Use the specified enabling device, reduced-speed settings and pendant controls. Prevent a remote or automatic command from starting motion while someone is inside.
- Jam clearing and recovery: Provide a written sequence for stopping the robot, isolating energy, securing suspended loads, removing the obstruction and testing the cell before restart.
- Cleaning and inspection: Include product buildup, damaged guards, misaligned sensors, worn tooling, loose cables and changes in the workpiece as inspection points.
- Training: Train operators, maintenance staff, programmers and supervisors on hazards, modes, safeguards, emergency stops, reporting and the limits of collaborative functions. Retrain when the process or controls change.
Commissioning, acceptance and records
Before production starts, the employer should verify that the integrator implemented the design described in the risk assessment. A site-acceptance process is a practical way to compare the delivered cell with the approved design and the actual job.
- Walk down the physical installation, including barriers, openings, access points, emergency stops, scanners, interlocks and warning devices.
- Test each safety function under normal and fault conditions, including loss of power, sensor interruption, gate opening, restart attempts and communication failures.
- Observe real operators performing loading, unloading, setup, cleaning, maintenance and fault recovery; do not validate only an ideal automatic cycle.
- Confirm that manuals, drawings, software versions, safety settings, procedures and training materials describe the installed configuration.
- Record corrective actions, responsible owners and closure evidence. Keep the assessment and validation records available for future changes, audits and incident investigations.
How requirements change by location and robot type
A U.S. factory may use ANSI/A3 R15.06-2025 as the national adoption of ISO 10218-1:2025 and ISO 10218-2:2025, but a contract or authority may require another edition or additional machinery standard. Canadian projects may use CSA Z434. A facility operating under a state occupational-safety plan may have requirements beyond federal OSHA guidance.
Mobile industrial robots, laboratory robots, service robots and consumer devices are not automatically covered by the industrial-robot standards. The process can add obligations too: robotic arc welding, laser processing, presses, conveyors, ovens, chemical handling and manual load stations each introduce hazards that the base robot standard does not resolve.
A practical decision framework for a new or existing cell
- If people never need access during production: Start with fixed guarding and controlled access, then assess setup and maintenance separately.
- If operators load or unload parts by hand: Analyze the handoff point, reach-through opportunities, part motion and restart behavior. ISO/TR 20218-2 may be relevant to the manual station.
- If people and the robot share a workspace: Define the permitted collaboration task, contact hazards, speed, separation, stopping response and tool risks. Do not rely on the collaborative label.
- If the process changes frequently: Treat each product, tool, payload and software change as a possible risk-assessment trigger.
- If maintenance requires entry: Use the hazardous-energy program and a written recovery procedure; normal production safeguards are not enough.
- If the installation is older: Compare the existing design with the current edition required by the jurisdiction or contract, then document any gap and the risk-reduction plan rather than assuming an older approval remains sufficient.
What “compliant” should mean in practice
Compliance is not demonstrated by owning a standard, installing an emergency-stop button or purchasing a cobot. It is demonstrated by a documented, application-specific process: hazards are identified, safeguards are selected and validated, workers are trained, non-routine work is controlled, and the employer verifies that the installed cell matches the assessed design.
For a U.S. project, begin by checking applicable OSHA duties and the jurisdiction’s adopted standards. Then use ISO 10218-1:2025 for the industrial robot, ISO 10218-2:2025 for integration and applications, and the related machinery, control-system and task-specific references that fit the cell. Keep the edition and jurisdiction qualification attached to every specification and compliance statement.
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