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Why automation guards and cages are vital: larger openings vs. smaller ones
Machine guarding opening sizes directly affects how close you can position the protect people from to moving parts or incidental ejection of parts without creating a reach-through hazard. Larger 2" square openings require a greater safety distance from the hazard to ensure operators cannot reach in, while smaller 1-1/4" openings limit reach-through potential and thus allow the guard to be installed closer to the point of operation. Both types of guarding can be used, depending on your application.
| Feature | 2" Square Openings (Woven Wire) | 1-1/4" Openings (Welded RapidGuard) |
|---|---|---|
| Mesh opening | 2" square – larger openings. | 1-1/4" – smaller, tighter openings. |
| Required distance to hazard | Requires a greater setback from moving parts to prevent reach-through access. Required setback is 33.46", or 850 millimeters. | Allows the guard to be installed closer to the hazard while still limiting reach-through. Required setback is only 4.7", or 120 millimeters. |
| Reach-through protection | Larger openings increase reach-through potential, which drives the need for additional distance from the hazard. | Smaller openings reduce reach-through potential, supporting closer placement to the point of operation. |
| Visibility & airflow | Higher visibility and airflow due to the more open mesh. | Slightly reduced visibility and airflow due to tighter mesh. |
| Typical application | Perimeter guarding where adequate distance from the machine can be maintained. | Applications with limited space where the guard must be positioned closer to the hazard. |
| Design consideration | Guard opening size directly affects the minimum safe distance required between the panel and the hazard. Always confirm distances using the applicable machine safety standards. | |