• Heavy Duty 2.80 lb Constant Force Spring - 42 in - Image 1
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Heavy Duty 2.80 lb Constant Force Spring - 42 in

Heavy Duty 2.80 lb Constant Force Spring - 42 in

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Enhance performance with our Heavy Duty 2.80 lb Constant Force Spring - 42 in. Ideal for aerospace, defense, and medical applications.

$37.99
$37.99
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Heavy Duty 2.80 lb Constant Force Spring - 42 in

Heavy Duty 2.80 lb Constant Force Spring - 42 in

$37.99

Quantity: 1

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Heavy Duty 2.80 lb Constant Force Spring - 42 in

Heavy Duty 2.80 lb Constant Force Spring - 42 in

$37.99

Quantity: 1

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The Heavy Duty 2.80 lb Constant Force Spring, with a band length of 42 inches, is expertly designed by John Evans Sons for maximum durability and consistent performance. Constructed from high-grade 301 Stainless Steel, it offers a fatigue life of 20,000 cycles, ideal for demanding applications in aerospace, defense, medical devices, and more. Its smooth, uniform load distribution and compact design make it a versatile and reliable choice for various industries, ensuring optimal functionality in limited spaces.

Product Specifications

Additional Information Additional Information
Our constant force springs and assemblies can eliminate costly and complicated motors, decreasing your device size and cost. These types of springs provide:Smooth, even, uniform load through entire length or travel (deflection)Strong force yield within small spacesExtensive linear rangeSmall package sizeAbility to easily mount to existing hardware
Design Considerations For Constant Force Springs Design Consider
There are many design factors that will affect the time and cost needed to manufacture your spring. Therefore, it’s important to work with a manufacturer like John Evans’ Sons that has the knowledge needed in the design phase.Mounting Methods: There are several mounting methods. Your application will determine which mounting method is best for your spring’s design.Material: Material will certainly affect the design and project cost. High temperatures or corrosive environments will also affect the life of a spring and the required material.Diameter and Load: Length, material width, thickness, and coil diameter affect the spring’s load. Increased loads can be obtained by using two or more constant force springs interwound, in tandem, or in other configurations.All of these, plus other technical considerations, need to be discussed and specified prior to creating prototypes. Our design engineering team can help ensure calculations and configurations are exact in the design phase.Our springs are most often used in the following industries and applications:AerospaceMedical devicesWindowsDefenseElectric motorsNot sure if constant force springs can provide the right action for your product? Contact John Evans' Sons for more information.
Note Note
The constant force springs listed below are available in small quantities from our stocking distributor, Stock Drive Products (SDP), or in larger quantities direct from our factory. For engineers and designers involved prototype development, who may require quick delivery of small quantities.
Specifications Band Length
42 in
Specifications Fatigue Life
20,000 cycles
Specifications Free Inside Diameter Id
1.578 in
Specifications Load
2.80 lb
Specifications Materials
301 Stainless Steel
Specifications Maximum Work Deflection
30 in
Specifications Thickness
0.012 in
Specifications Width
1.000 in