The image shows a black accordion-like rubber bellows with a square shape and multiple folds. It has holes for mounting around the outer frame. The object is isolated on a white background.

Bellows Covers

Dynatect is a bellows manufacturer specializing in customized bellows for all industries and applications.

As a custom manufacturer, we offer covers in any size or shape with a wide choice of manufacturing methods (e.g., stitched, molded, etc.).

Dynatect is the only manufacturer to offer 12 different construction methods for bellows. This includes construction and materials selection to address many specialty applications including food-grade materials, high-temperature, anti-microbial, high lateral shear, wash-down, pressure/vacuum changes, and meeting UL burn standards.

Find a Rep Applications Bellows FAQ

Bellows Applications

  • Bellows covers help protect valuable components (such as ball screws and machine ways) from damage by keeping away abrasives and liquids
  • Bellows can also serve as a flexible seal between two joints with relative movement, such as bus bellows, or as airflow ducting in applications including traction motor ventilation, engine exhaust/cooling, and respirators or ventilators
  • Bellows are also applied to electrical transitions for distributions switchgear and generators as a busbar bellows and wireway flexible fittings to correct for X, Y, and Z axis misalignments
  • As a lift cover, bellows cover pinch points on scissors lifts or medical tables
  • In some cases, the bellows’ function is simply to conceal a mechanical part for aesthetic purposes, with the added benefit of keeping out dust, as in medical equipment, shift levers, or joystick boots
  • When dust is a concern, Dynatect offers suitable bellows for lab and metrology equipment to seal out dust particles. A light-tight, folded construction is ideal for laser or camera bellows applications

Bellows in Use

A Leading Bellows Manufacturer Since 1945

See how Dynatect has revolutionized the industry for 80 years. Dynatect Manufacturing isn’t just a bellows manufacturer; it’s a pioneer in dynamic protection solutions. Watch the video below and discover how Dynatect’s dedication to innovation has shaped the world of bellows manufacturing.

This video showcases:

  • Diverse bellows applications across various industries
  • A behind-the-scenes look at our diverse manufacturing processes and skilled craftspeople

Innovatively Delivering Quality, High-Performance Bellows

At Dynatect, our commitment to high-quality, high-performing bellows extends beyond the manufacturing floor. We believe the key lies in collaboration. We work closely with our customers to gain a deep understanding of their specific needs and challenges. This collaborative approach facilitates an environment for exploring innovative solutions that might not have been previously considered. Together, we can push the boundaries and potentially even discover solutions that exceed initial expectations.

Our commitment to your success extends beyond the design phase. With over 50 local manufacturer’s representatives strategically located across North America, you receive expert service and consultation wherever you are. Our representatives have a deep understanding of our products and your local market, ensuring you receive the support you need to succeed.

bellows
Two images of construction drilling machines adorned with protective bellows. The left image shows the entire machine with a drill, positioned at a construction site. The right image offers a close-up view of the drill component and its bellows covers against a cloudy sky.

Dynatect sets itself apart from the competition in several key ways. Unlike many bellows suppliers who primarily focus on fast, low-cost production, Dynatect prioritizes both quality and customization. We offer the industry’s widest variety of manufacturing processes and materials, allowing us to tailor solutions to specific customer needs. This flexibility is particularly valuable for applications requiring tight tolerances, high aesthetics, or extreme performance.

Notably, Dynatect is equipped to handle “extreme” bellows – the longest, fastest, or widest – that might push the boundaries of what other manufacturers can produce.

Additionally, Dynatect is prepared to grow alongside their customers. We can accommodate orders of any size, ensuring a continued, reliable source of high-quality bellows as a customer’s market adoption expands.

Molded Rubber Boots/Bellows

Rubber boots/bellows can be ordered as a custom design or from a predefined standard design. Dynatect manufactures custom-made molded rubber bellows and stock rubber bellows for standard rod sizes.

Rubber bellows function as “dust boots” to seal out dust and other light-duty environmental contaminants while enabling a predetermined range of motion for the protected part.

Rubber boots are common in industrial and automotive applications. In automotive applications, the bellows may be called a gaiter. This is a type of bellows that is often used in automotive applications to protect the moving parts of a vehicle’s suspension system from dirt and debris.

Rubber bellows may function as tubing or ducting, however, bellows are most commonly used as a protective cover.

Depending on the manufacturing process, molded bellows can have an extended resting position, which means convolutions are extended in the resting position. For an example, visualize a convoluted drainage pipe. Other bellows may have a “closed” resting position, which means the bellows convolutions are tighter together (naturally compressed) when in a relaxed state.

Two images of bellows in open and closed positions

Left: Convolutions are open while bellows is resting. | Right: Closed peaks in resting position

Many molded rubber bellows tend to have a large extended-to-retracted ratio, and the bellows are stiffer overall.

Dynatect has a variety of manufacturing processes to produce molded bellows in either style. Dynatect’s Gortiflex rubber bellows have an excellent extended-to-retracted ratio, meaning the tight compression can satisfy a more dynamic range of motion.

Close-up of two molded bellows

Molded bellows usually have a more rounded peak at each convolution

Other rubber (technically elastomer-coated materials) bellows are made by sealing or stitching alternating inner and outer rings of material, resulting in convolutions that are “sharper” or more v-shaped. The latter tends to have a more “industrial” look, although Dynatect’s Thermiseal bellows are exceptionally neat in appearance.

Two images comparing a dip-molded bellows and a Thermiseal bellows

Left: Dip-Molded Bellows | Right: Thermiseal Bellows

Flange and collar options, backup plates, and worm-gear clamps satisfy common mounting requirements. While mounting accessories may be specified at the time of order, it is recommended to consider the mounting requirements at the time of quotation.  → View accessories page

Dynatect Bellows Types – Overview Video

Watch this 2-minute overview to visually compare the most frequently ordered bellows constructions and their unique design features.

Bellows FAQ

This Bellows FAQ section covers the most basic questions about bellows in general, but also details questions about our manufacturing processes. If you have a question about bellows that is not answered here, we always encourage you to contact us!