Rubber Bellows » Molded Bellows & Dust Boots

Columbia TM brand bellows and convoluted rubber dust boots are versatile seals used in a wide range of applications to seal dust and other environmental elements in applications with a stroke or designed range of motion. Rubber bellows and convoluted dust boots can be custom designed for the application and are available in a range of rubber materials including EPDM, TPE and Silicone.

Custom Rubber Bellows
Custom Rubber Bellows
Rubber Bellows with Breather Hole

Rubber Bellows Structure: Breather Holes and Assembly Interfaces

In many applications bellow ventilation is a critical design feature to prevent pressure or vacuum conditions when the rubber bellow is actuated in the application. Ventilation can be accomplished in a number of manners, but typically is accomplished with the addition of breather holes in the bellow. For harsh environments, Columbia has a range of filters that can be molded into the assembled bellow to help prevent the introduction of large foreign particles into the application. In addition to breather holes Columbia also offers various types of custom assembly interfaces as shown below.
Rubber Bellow Options

Rubber Bellows Structure: Connectors

Rubber Bellows Connectors function as the interface between the convoluted bellows region of the boot and the assembly (application) and are used to secure the two ends of the bellow to the assembly. Connectors are highly customized to unique application interfaces and can be designed to include holes, mechanical locks, clamping surfaces and many other features. A sampling of these designs are detailed as follows:
Bellow Connecto Style 1Bellow Connecto Style 2Bellow Connecto Style 3Bellow Connecto Style 4Bellow Connecto Style 5Bellow Connecto Style 6Bellow Connecto Style 7Bellow Connecto Style 8Bellow Connecto Style 9

Rubber Bellows Materials:

Columbia TM brand Rubber Bellows and dust boots are available in a range of performance rubber, TPE, and silicone materials specifically engineered for a variety of applications. Customers can select from our current material catalogue or we can develop a new material for your unique application. The more common materials utilized for below applications are as follows:
Bellow Materials
Rubber Bellow Structure Example
RUBBER COUMPOUNDS TYPES AND REFERENCES


Material

 

Abbreviation

Temperature
Range (dry heat)
Aging
Weathering,
Ozone
Resistance to
Oil & Grease

Water Swell
Resistance


Flex-Fatigue

Economy of
Material


Material Notes
Chloroprene (Neoprene)
CR
-40F to 250F
Good
Good
Average
Very Good
Good
exposure to refrigerants, can be compounded for FDA applications
Nitrile
NBR
-22F to 212F
Poor
Very Good
Good
Good
Very Good
excellent resistance to petroleum based oils and hydrocarbon fuels
Ethylene-Propylene
EPDM, EPM
-60F to 300F
Very Good
Poor
Very Good
Good
Very Good
Silicone
VMQ
-75F to 450F
Very Good
Average
Very Good
Very Good
Average
medical and aerospace applications
Fluorocarbon
FKM
5F to 390F
Very Good
Very Good
Good
Average
Poor

Rubber Bellows Structure:

Rubber Bellows can be engineered in a number of structures to meet various application requirements. The most common structure is composed of two connectors and a convolution region where the connectors provide the assembly interface and the convolution (bellows) region provides for the design application travel. These features are detailed as follows:
Bellow Structure
Legend    
Feature: Reference: Requirement:
A1 Connector 1 Inside Diameter (ID)
A2 Connector 1 Connector Height
A3 Connector 2 Inside Diameter (ID)
A4 Connector 2 Connector Height
L - max Bellows Length Maximum Extension
L -min Bellows Length Minimum Extension
C1 - min Bellows ID Application Min. Allowable (ID)
C2 - max Bellows ID Application Max Allowable (ID)
D1 Bellows Wall Wall Thickness - Continuous
E1 Bellow OD Application Max Allowable (OD)
Custom Rubber Bellows
Custom Design and Manufactured for Your Application
Columbia's experienced team can develop and manufacture a Custom Bellow designed specifically for your application. Please forward your application details, prints & specifications or contact our bellow team. Our Custom Bellow RFQ form is available to assist you with your RFQ.
Custom-Rubber-Bellow-Backdrop
Learn More About Customer Bellows
Custom Bellow Manufacturing & Design
» Design Optimized for
   Application Envelope


» Convolutions Design
   Optimization for Proper
   Folding, Extended &
   Collapsed Lengths


» Custom Flange &
   Connectors Designs
Custom Bellow Examples
Custom Bellow Examples:
Pre-Engineered Rubber Bellows
» Over 500 pre-engineered bellow designs available
» Quick search tool to compare available designs to application requirements

    Types Include: - Multi-convolute & single-convolute bellows
                             - Straight & tapered bellows

» Online ordering for both stock & special run bellows
Pre-Engineered Bellows Search Example
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Recent Production Examples or Pre-Engineered & Custom Rubber Bellows

Rubber Bellow ExampleRubber Bellow Production ExampleCustom Rubber Bellow ExampleRubber Dust Boot ExampleCustom Bellow ExampleBellows exampleRubber Bellows Example Molded Rubber Bellows Example
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