IP RATINGS FOR ACTUATORS: THE “STATIC VS DYNAMIC” DETAIL THAT MATTERS

Ingress Protection (IP) ratings define how well the actuator and its connectors are protected against solid particles and water exposure, with higher numbers indicating greater environmental protection. IP ratings are commonly used when selecting actuators, especially in dusty environments, washdown areas, or anywhere exposure is expected.

But there’s a critical detail that can get missed during the specifications review:

Many electro-mechanical screw-type actuator providers list their IP ratings as “static”, meaning the rating applies only when the actuator is not moving. Once the actuator cycles, that protection level no longer applies.

WHEN IP RATINGS MEET REAL OPERATING CONDITIONS

Many industrial applications target IP65 protection, commonly used for environments that demand complete dust protection and protection against water jets from any direction. However, in many electro-mechanical actuator designs, moving components (like a screw) can be exposed to the environment. When that screw repeatedly moves in and out, it creates an opportunity for dust, moisture, and abrasive contaminants to work their way into the actuator or internal grease/oil to exit the actuator. Over time, environmental ingress can accelerate wear and shorten service life.

INGRESS PROTECTION CONSIDERATIONS FOR ACTUATOR SELECTION

If the application involves any exposure (dust, coolant, washdown, outdoor humidity, etc.), make sure your IP rating questions include:

• Is the actuator’s IP rating static or dynamic (moving)?
• Are any moving elements exposed to the environment during stroke?
• What environmental conditions are expected (dust, water jets, chemicals, washdown)?

For official definitions and classifications of IP codes, refer to the International Electrotechnical Commission (IEC) Ingress Protection (IP) Ratings Guide, which outlines protection levels for solids and liquids under IEC 60529.

THE KYNTRONICS APPROACH

Kyntronics hybrid linear actuators and compact servo power units are engineered to thrive where traditional technologies fail. They provide servo-controlled precision and long-life performance in a sealed, IP-rated design, eliminating the frequent failures and costly replacements common with electro-mechanical actuators and the leaks, maintenance headaches, and product spoilage risk associated with hydraulic actuation systems.