BSTFLEX Sewn Zippered Bellows are custom fabric protective covers with a longitudinal zipper that opens for fitting around existing cylinder rods, ball screws, shafts and actuators. The split design provides convenient access for inspection, servicing and bellows replacement, helping reduce component disassembly where equipment layout and end mountings allow.
The pleated construction extends and compresses with machine travel while helping protect moving parts from dust and debris. Each zippered fabric bellows can be customized in profile, compressed length, extended length, stroke, zipper position and end fittings. Fabric, sewing thread and zipper components are selected according to operating temperature, coolant exposure and movement requirements for OEM machinery, maintenance and retrofit projects.
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1BSTFLEX Sewn Zippered Bellows are custom flexible protective covers designed for machinery where quick installation, inspection or maintenance access is required. An integrated zipper allows the bellows to open along its length so it can be fitted around an existing cylinder rod, shaft, screw, guide or actuator without completely disassembling the protected equipment.
During operation, the accordion-style fabric construction extends and compresses with machine movement while helping protect critical components from dust, metal chips, abrasive particles, oil, coolant, grease, sparks and heat.
This removable construction makes zippered bellows particularly suitable for replacement projects, maintenance-intensive machinery and equipment where conventional closed bellows are difficult to install.
The key advantage of a zippered bellows is service accessibility.
A conventional one-piece bellows may require removal of shafts, rods or other machine components before installation. A split bellows with a zipper can instead be opened, wrapped around the component and closed in position.
This can simplify:
Different closure systems can be selected according to the application.
BSTFLEX can manufacture bellows with:
A zipper is generally preferred where repeated access is required and a more secure longitudinal closure is needed.
Hook-and-loop closures may be suitable where quick fitting and removal are more important.
Snap closures can also be incorporated for selected industrial applications.
Each sewn zippered bellows can be manufactured according to the actual dimensions and stroke of the protected machine component.
| Specification | Available Options |
|---|---|
| Bellows Shape | Round, rectangular or custom |
| Inside Dimensions | Custom |
| Outside Dimensions | Custom |
| Extended Length | Custom |
| Compressed Length | Custom |
| Stroke | According to machine travel |
| Closure | Zipper, hook-and-loop, snap or custom |
| Fabric | According to operating environment |
| Mounting | Collar, flange, clamp or custom |
| Reinforcement | Optional |
| Production | Prototype and OEM production |
The convolution depth, number of folds and closure position can be engineered according to installation clearance and movement requirements.
Material selection depends on the type of contamination, operating temperature and mechanical environment.
BSTFLEX can produce zippered fabric bellows using a range of technical textiles.
Suitable for general industrial applications requiring flexibility, abrasion resistance and protection against dust, dirt, oil and workshop contamination.
Suitable for higher-temperature machinery and applications exposed to heat, sparks or hot surfaces.
Recommended where chemical resistance, elevated temperature capability and reduced surface adhesion are required.
Suitable for applications exposed to radiant heat near furnaces, foundries, exhaust systems or hot process equipment.
Other fabric constructions can be developed according to temperature, abrasion, oil, grease, chemical exposure and flexing requirements.
Sewn zippered bellows are especially practical for hydraulic and pneumatic cylinders already installed on machinery.
Instead of removing the cylinder or disconnecting the rod assembly, the bellows can be opened and installed around the existing component.
Typical applications include:
The bellows helps reduce exposure of the rod surface to abrasive particles and contamination that may otherwise affect seals and moving interfaces.
Ball screws and lead screws used in machine tools and automation systems are vulnerable to metal chips, grinding dust, coolant and other contaminants.
Custom zippered bellows can provide a removable protective enclosure around these components while allowing easier maintenance access.
Typical equipment includes:
Zippered bellows can also be designed for:
For machinery located near furnaces, foundries, welding areas or other hot processing equipment, BSTFLEX can manufacture high temperature zippered bellows using heat-resistant technical fabrics.
Suitable construction depends on:
The zipper and sewing thread must also be selected according to the operating environment, rather than evaluating only the outer fabric.
Custom mounting configurations can include:
This allows the bellows to be integrated into both new OEM machinery and existing equipment retrofits.
BSTFLEX Sewn Zippered Bellows can be used for:
For quotation, please provide:
BSTFLEX can manufacture prototype, replacement and OEM zippered bellows according to customer drawings and application requirements.
BSTFLEX combines custom industrial sewing with extensive experience in heat-resistant technical textiles. This allows us to develop both general-purpose removable bellows and high-temperature zippered bellows for demanding industrial environments.
Custom dimensions, different closure systems, special fabrics and OEM configurations are available.
Send us your equipment dimensions, operating environment, required stroke and installation photographs for evaluation.
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Custom Sewn Rectangular Bellows for Machine ProtectionNext:
Custom Sewn Wire Supported Bellows for Large Diameter ApplicationsIf you have questions or suggestions, please leave us a message,we will reply you as soon as we can!
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