Dynatect (formerly A&A Manufacturing) has manufactured Gortite sewn bellows for over 65 years using the same proven methods. Paying special attention to details allows us to optimize each cover for the best performance. Accordian-style sewn bellows are constructed with a wide variety of materials, chosen to match the application environment. Specially developed materials and threads are available for high ambient temperature or light weld spatter. Sewn bellows can be designed for any size or shape, with the advantage of no tooling charges.
A selection of common sizes (round profile) in 12-inch extended length increments are available from stock. Shipped in 1-3 business days. View cylinder rod boot sizes:
For rush shipment of qualifed standard sewn bellows (.018 Neoprene/Nylon or .030 Aluminized Carbon Fiber material only) within 1 business day for qualified orders. (The Quick Turn Service Promise may not be eligible for customers outside the United States due to export compliance requirements, but we will still treat your order as a rush.)
Sewn construction is not liquid or air tight, but a liquid elastomer coating can be added to the seams to limit liquid seepage. Also, this coating may extend the life of the cover by limiting thread exposure to the environment in severe applications. Individual segments of fabric are brought together with industrial strength Nylon or Kevlar thread, depending on the application.
Sewn bellows material choices include heavy-duty elastomer coated fabrics such as:
Specialty materials are available for use with fire resistant hydraulic fluids, expanded temperature ranges and other special requirements.
Options & Accessories
Literature & Quote Forms (PDF)
Quote Request (RFQ) Forms
Bellows Way Cover
(with stiffener profile, heat-sealed or stitched)
Dynatect supplied a silicone/fiberglass bellows for protecting a large hydraulic cylinder on a forging press. Additional features: tie strips, screen vents, internal steel rings (for maintaining shape) and a zipper for installation.
This sewn bellows was made to extend over 4 stories tall!
Dynatect sewn bellows on a telescopic pole, specially designed for outdoor conditions.
Dynatect sewn bellows designed to conceal the mechanism on a head rest.