6 Best Vibration Mounts For Control Cabinets Worth Using

Control cabinets housing sensitive electrical components are no different from heavy HVAC units sitting on a roof deck; both require precise vibration isolation to prevent premature failure. When machinery vibration transfers into a delicate PLC or control board, the result is often loose connections and ghost errors that haunt a project for months. Selecting the right mount prevents structural fatigue and keeps internal circuits running as intended. Proper isolation is the difference between a cabinet that lasts twenty years and one that fails shortly after the warranty expires.

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VMC Group NCM Mounts: Best Overall Isolator

VMC Group’s NCM mounts are the gold standard when handling high-frequency vibration in industrial settings. These mounts utilize a non-skid, high-grade elastomer that effectively decouples the cabinet from the floor slab.

They excel in environments where machinery is constantly cycling. If you are mounting a control cabinet on a mezzanine or near a high-speed conveyor system, the NCM mount acts as a necessary buffer.

The steel housing provides superior durability, meaning it won’t crack or dry rot like cheaper rubber alternatives. For most standard cabinet installations, this is the most reliable, “set-it-and-forget-it” option.

Fabreeka Fabcel Pads: Best for Custom Setups

Fabreeka Fabcel pads offer the ultimate flexibility for installers dealing with odd-sized cabinets or uneven floor surfaces. These are essentially high-performance dimpled pads that you can cut to size on-site with a standard utility knife.

These pads are ideal for retrofitting existing cabinets where bolting down isn’t feasible or desired. Their cellular design allows for significant load distribution, effectively absorbing shock before it reaches the electronics.

Since they can be stacked or trimmed, they work exceptionally well when leveling a cabinet on a slightly out-of-plumb concrete slab. They are the go-to solution when field conditions change rapidly and standard mounts won’t fit.

Lord Plate-Form Mounts: Most Versatile Option

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Lord Plate-Form mounts are designed for applications where space is at a premium and the mounting profile must be low. These mounts excel at isolating equipment that moves in both vertical and horizontal directions.

Contractors often prefer these when mounting control cabinets in vehicles, skid-mounted units, or mobile industrial platforms. Their plate-style design provides a secure base that distributes weight across a larger surface area than a standard bolt-down bobbin.

Because of their versatile construction, they handle erratic movement better than rigid isolators. If the cabinet is located in a high-traffic area with constant bumps or vibrations, use these to protect sensitive internal logic boards.

Mason SLR Mounts: Top Pick for Seismic Loads

Mason SLR mounts serve as a critical defense line for cabinets installed in regions prone to tectonic activity. These mounts incorporate a restrained spring design that prevents the cabinet from tipping or shifting during a seismic event.

While standard elastomeric mounts might compress under intense force, the SLR series maintains its integrity. They are mandatory in many commercial building codes where critical infrastructure must remain anchored.

Installation requires careful attention to the pre-compressed spring settings. If the job site falls within a seismic zone, do not compromise with generic mounts—use the SLR to meet code and ensure cabinet stability.

H.A. King Bobbins: For Internal Components

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Sometimes the vibration originates inside the cabinet itself, such as from cooling fans or small transformers. H.A. King bobbins are cylindrical, rubber-bonded isolators that are perfect for mounting these specific components to the cabinet backplane.

They are straightforward to install using simple hardware and provide immediate relief from “cabinet hum.” By isolating the fan or transformer at the source, the entire structure stays quieter and less prone to vibration-induced screw loosening.

Do not overlook these small, inexpensive components during the build phase. A handful of bobbins inside the cabinet can prevent the structural resonant frequency issues that plague large, empty electrical enclosures.

Novibra M-Mounts: Best for High-Deflection

Novibra M-Mounts are specifically engineered for equipment that generates significant displacement. These isolators have a high deflection rating, meaning they can compress and rebound significantly without bottoming out or damaging the internal rubber core.

These are best suited for cabinets located near massive, slow-moving equipment that creates low-frequency, high-amplitude vibrations. Standard stiff mounts would likely transmit that energy, but the M-Mount absorbs the travel.

They are heavy-duty and built for harsh industrial environments. When the vibration amplitude is high, these mounts offer the necessary travel to keep the cabinet chassis stable.

How to Match a Mount to Your Cabinet’s Weight

Calculating the weight load of a cabinet involves more than just reading the scale; it requires considering the weight distribution of the internal components. An unbalanced cabinet will place more load on one or two mounts, potentially causing them to bottom out prematurely.

Always divide the total weight of the cabinet—including all internal gear, cabling, and hardware—by the number of mount points. A good rule of thumb is to ensure that the static load on each mount is roughly 75% of its rated capacity.

Leaving this 25% buffer allows for dynamic movement during operation. Never spec a mount based on the exact weight of the cabinet; always provide a significant margin for error to account for future add-ons.

Understanding Durometer and Deflection Specs

The durometer represents the hardness of the rubber, with higher numbers indicating a stiffer mount. A softer mount (lower durometer) is better for light, high-frequency vibrations, while a harder mount is required for heavy-duty machinery support.

Deflection refers to how much the mount compresses under a specified load. High-deflection mounts are generally more efficient at isolating low-frequency vibrations, which are the most difficult to dampen.

Do not ignore these specs in favor of the cheapest option on the shelf. If the durometer is too high, you aren’t isolating anything; if it’s too low, the cabinet will wobble and lean.

Common Installation Mistakes to Avoid at All Costs

The most frequent error is “bridging,” which occurs when a conduit, rigid piping, or even a tight cable ties the isolated cabinet to the building structure. If you isolate the base but strap the conduit to the wall, you create a direct path for vibrations to bypass the mounts.

Always use flexible conduits or cable loops when connecting an isolated cabinet to the building’s electrical or pneumatic supply. Additionally, ensure all mounts are leveled precisely so that no single mount is carrying a disproportionate share of the load.

Lastly, inspect the mounting bolts for tightness, but do not overtighten; this can compress the rubber and negate the isolation properties of the mount. A mount is only as effective as the installation method surrounding it.

Do You Need Seismic-Rated Vibration Mounts?

Seismic-rated mounts are not just a luxury; they are a structural requirement in many regions to ensure that life-safety equipment remains functional during an earthquake. Check local building codes regarding the “Importance Factor” of your specific electrical installation.

If the cabinet controls fire pumps, emergency lighting, or primary power distribution, it likely falls under a high seismic category. These mounts include a secondary safety factor—usually a steel housing—that keeps the cabinet tethered even if the rubber component fails under extreme shear stress.

When in doubt, consult the project’s structural engineer or the local building inspector. Choosing seismic-rated mounts is the cheapest insurance policy against a total system failure during a major seismic event.

Proper vibration isolation is the foundation of a reliable control system, ensuring that delicate electronics remain protected from the chaotic energy of the industrial environment. While the cost of quality mounts may seem high initially, the reduction in maintenance calls and component replacements pays for the investment within the first few years of operation. Evaluate the specific frequency and load requirements of every cabinet, and always prioritize long-term performance over initial savings.