Riveting machines may look relatively simple compared with larger presses, robotic cells, or automated equipment, but the hazard at the point of operation can be significant.
Whether the machine is pneumatic, hydraulic, mechanical, foot-operated, or automatically cycled, the basic concern is similar:
Can the operator's fingers or hands enter the hazardous area when the riveter cycles?
If the answer is yes, the application deserves a closer look.
Why Riveting Machines Create a Safeguarding Challenge
Many riveting operations require an operator to manually position a small component directly between or near the rivet tooling.
That creates an inherent conflict.
The operator needs access to load and position the part, but the same area they need to access is often where the machine develops its force.
Potential hazards can include:
- Crushing or pinching between the rivet tooling and workpiece
- Finger or hand exposure at the point of operation
- Unexpected machine cycling
- Accidental actuation of foot or hand controls
- Movement of tooling during setup or adjustment
- Ejected parts, rivets, or tooling
- Stored pneumatic or hydraulic energy
The smaller size of the machine doesn't necessarily mean the risk is small.
What Does OSHA Say About Riveting Machines?
OSHA addresses riveting-machine safeguarding through its general machine-guarding requirements.
29 CFR 1910.212 requires one or more methods of machine guarding to protect operators and other employees from hazards including those created at the point of operation. OSHA specifically states that when machine operation exposes an employee to injury, the point of operation must be guarded so the operator cannot have a body part in the danger zone during the operating cycle.
OSHA has also specifically addressed riveting machines in an interpretation letter, identifying 29 CFR 1910.212(a)(1) as the applicable guarding requirement for riveting machines.
The practical question therefore isn't simply:
"Does OSHA require a guard on a riveter?"
A better question is:
"How are we preventing the operator from being exposed to the hazardous point of operation when this machine cycles?"
ANSI and the Risk-Based Approach
The ANSI B11 framework provides additional guidance for evaluating and reducing machinery risks.
ANSI B11.0-2023 – Safety of Machinery establishes general machinery-safety and risk-reduction principles for new, existing, modified, and rebuilt power-driven machinery.
ANSI B11.19-2019 (R2024) provides performance requirements for risk-reduction measures, including guards, safety-related control functions, safeguarding devices, and administrative measures.
Rather than assuming one safeguarding technology is correct for every riveter, the application should be evaluated based on the actual hazard and how the machine is used.
Common Riveter Safeguarding Options
There isn't one universal riveter guard.
The appropriate solution depends on factors such as machine construction, tooling, stroke, operating method, part geometry, production requirements, and how frequently the operator must access the point of operation.
1. Fixed or Adjustable Physical Guarding
Where the process allows it, physical guarding can restrict access to hazardous areas while leaving only the opening necessary to insert the workpiece.
This can be one of the simplest approaches when the part geometry and process are consistent.
The challenge is ensuring the opening doesn't still allow an operator to reach the hazard.
2. Point-of-Operation Finger Detection
Some riveter applications require the operator's fingers to be very close to the tooling while positioning small components.
For these applications, specialized point-of-operation safeguarding technologies may be considered that are designed to detect the presence of a finger or other obstruction near the hazardous area.
Depending on the application, technologies such as finger-detection or soft-touch sensing systems may provide a practical alternative when conventional barrier guarding interferes with the manufacturing process.
The important distinction is that these aren't simply operator conveniences. When used as part of the machine's safeguarding system, their application needs to be evaluated for the actual hazard and machine-control architecture.
3. Two-Hand Controls
Some applications may allow two-hand controls to initiate the hazardous portion of the machine cycle while requiring both of the operator's hands to be positioned away from the point of operation.
However, two-hand controls aren't automatically appropriate simply because a machine has two pushbuttons.
Their design and application need to account for factors such as control arrangement, simultaneous operation, machine stopping characteristics, safety distance, and the possibility of another person being exposed to the hazard.
4. Presence-Sensing Safeguarding
Depending on the machine and application, presence-sensing devices may also be considered.
The safeguarding system must be designed so detection of a person entering the protected area results in the appropriate safety-related machine response.
For very small point-of-operation hazards, however, a conventional light curtain or similar device isn't always the most practical solution. The specific application matters.
5. Tooling and Fixture Design
Sometimes risk can be reduced by changing how the operator interacts with the part.
Fixtures, part holders, feeding mechanisms, or redesigned tooling can increase separation between the operator's hands and the hazardous area.
This is an important consideration because the best solution isn't always adding another safety device to the machine.
Don't Forget the Machine Controls
Point-of-operation protection is only one part of riveter safety.
A safeguarding review should also consider how the machine starts, stops, resets, and responds to interruptions.
Questions may include:
Can the machine restart unexpectedly after power is restored?
Can accidental operation of a foot pedal initiate a cycle?
Does opening or triggering a safeguard create the appropriate safe response?
Is manual reset required after a safety device is activated?
Can safeguarding devices be easily bypassed or defeated?
Does the machine's safety-related control system provide an appropriate level of risk reduction?
When safeguarding depends on a control system rather than only a physical barrier, the safety-related portions of that control system become part of the overall solution. ANSI B11.26-2024 provides requirements and guidance for safety-related control functions involving electrical, electronic, pneumatic, hydraulic, and mechanical control-system components.
Foot Pedals Deserve Special Attention
Foot-operated riveters are particularly worth reviewing.
A foot pedal allows the operator's hands to remain free—which is often exactly why it is useful for production.
But that also means the operator's hands may be near the point of operation when the machine is initiated.
A covered or protected foot pedal can help reduce accidental activation of the pedal, but it does not by itself address hand exposure at the point of operation.
Those are two separate hazards.
Protecting the actuator shouldn't be confused with safeguarding the machine.
Existing Riveters Shouldn't Be Automatically Excluded
Older equipment is sometimes assumed to be acceptable because it was manufactured before newer safeguarding technology became common.
That isn't a good basis for evaluating machine safety.
OSHA's general machine-guarding requirements apply to hazardous machine exposures, and ANSI B11.0 specifically addresses existing as well as new, modified, and rebuilt machinery.
An older riveter should therefore be evaluated based on its hazards and current use—not simply its age.
Start With the Application, Not the Device
One of the biggest mistakes in machine safeguarding is starting with a preferred product.
Instead of asking:
"Can we put a light curtain on this riveter?"
Start with:
"What is the hazard, how is the operator exposed to it, and what risk-reduction method works with this process?"
That may lead to a physical guard.
It may lead to specialized finger detection.
It may lead to two-hand controls.
It may require changes to tooling or fixtures.
Or it may require a combination of safeguarding methods.
The objective isn't to add a safety device. The objective is to develop a practical solution that reduces exposure while allowing the machine to perform its intended function.
The Takeaway
Riveting machines are a good example of why machine safeguarding isn't determined by the physical size or complexity of the equipment.
A relatively small point of operation can still create a significant crushing or pinch hazard when an operator repeatedly positions parts near moving tooling.
The right approach is to evaluate the hazard, operator interaction, machine controls, tooling, and production process together before selecting the safeguarding method.
For manufacturers with older or manually loaded riveters, a machine-safety review can help determine whether existing guarding is adequate and whether physical guarding, specialized presence detection, control modifications, tooling changes, or another engineered solution is appropriate.
From Risk to Retrofit — the goal is not simply identifying the hazard. It's engineering a practical way to reduce it.
