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Compression Springs in China - Quality Energy Storage Solutions from Top Suppliers and Factory
Feature
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Compression Springs are found in a wide variety of applications ranging from automotive engines and large stamping presses to major appliances and lawn mowers to medical devices, cell phones, electronics and sensitive instrumentation devices. The most basic installation is anywhere requiring a push button. Conical type springs are generally used in applications requiring low solid height and increased resistance to surging.
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SMS Spring offers advanced capabilities and a wide variety of options for custom compression spring manufacturing needs such as; advance quality control systems, regulatory expertise including RoHS, REACH and CAD assisted product design, in-house prototype production services and global supply chain network. SMS Spring is ISO 2015:9001 certified and RoHS compliant.
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SMS Spring can manufacture custom compression springs in small or large quantities. SMS Spring can supply for short run R&D projects up to large, long run blanket orders that run over a period of years.
Key Parameters
Unit of Measures
SMS Spring are specified in both Imperial (inch and pound) and Metric units.
Rate
Spring rate is the change in load per unit deflection in pounds per inch (lbs/in) or Newtons per millimeter (N/mm).
Stress
The dimensions, along with the load and deflection requirements, determine the stresses in the spring. When a compression spring is loaded, the coiled wire is stressed in torsion. The stress is greatest at the surface of the wire; as the spring is deflected, the load varies, causing a range of operating stress. Stress and stress range govern the life of the spring. The wider the operating stress range, the lower the maximum stress must be to obtain comparable life. Relatively high stresses may be used when the operating stress range is narrow or if the spring is subjected to static loads only.
Direction of Wind
Coil compression springs are wound in either a left hand or right hand direction, similar to a screw type thread.
Counting Coils
There are two primary methods of counting coils that apply to springs, active coil count and total coil count.
Ends
There are four primary end type configurations for compression springs. The spring end may be ground or unground, and the end coils may be open or closed coil.
Outside Diameter
The diameter of the cylindrical envelope formed by the outside surface of the coils of a spring.
Hole Diameter
This is a measurement of the space where you would insert a compression spring. It is the diameter of a mating part to a compression spring and often commonly mistaken for a dimension of the spring itself. The hole diameter should be designed larger than your compression spring's outside diameter factoring tolerance and spring expansion under load.
Rod Diameter
This is a measurement of the rod that goes through the inside of a compression spring. Essentially a mating part, this rod can work as a guide shaft to minimize spring buckling under load. The rod diameter should be designed smaller than your compression spring's inside diameter factoring tolerance; however, not too small or else it loses ability to minimize spring buckling.
Free Length
The length of a spring when it is not loaded. NOTE: In the case of extension springs, this may include the anchor ends.
Wire Diameter
This is a size measurement of the raw material used to form a spring. Conventional springs are made with round wires that are specified to a diameter.
Programing
Material
This is the raw material type used to form a spring. Common types include carbon steel, stainless steel, nickel alloys, copper alloys, and cobalt alloys. Your application could guide your material options for a spring.
Spring Set
This is an occurrence when a spring is loaded beyond its material elastic strength. It is a kind of permanent deformation that is noticeable when a spring does not return to its original length after releasing a deflection load. Depending on the application, spring set can be either desirable or undesirable.
Load at Solid Height
This is a measurement of the force required to completely deflect a compression spring to where the coils are fully pressed together. For product designers that want to avoid the occurrence of bottoming out a compression spring, Load at Solid Height is quick reference property to find springs capable of handling an assembly's maximum operating load.
Solid Height
This is a length dimension of a compression spring at its maximum loaded condition. Effectively, this is the compression spring's height when all the coils are pressed together.
Finish
There are a number of finish and plating options available for springs. The application of the spring will help to determine the best finish and plating options for a specific application. Spring finish may be used to protect or to help identify a spring.
Compression Spring Types & Shapes
Compression springs are manufactured in a variety of shapes. Custom designs may have any number of shapes depending on the application.
Spring Solutions
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Cone shaped compression springs have a spring radius that decreases towards the end of the spring. This is a common shape used for battery springs.
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Hour glass compression springs taper tighter towards the center and the outer coils have a larger diameter.
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Barrel shape compression springs have a design that is reduced at the ends and wider in the center.
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Reduced ends compression springs are straight across the center coils and taper only towards the end coils.
Frequently Asked Questions (FAQ)
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What industries commonly use compression springs manufactured by SMS Spring?
SMS Spring's custom compression springs are used across a broad range of industries including automotive engines, large stamping presses, major appliances, lawn mowers, medical devices, cell phones, electronics, and sensitive instrumentation devices. Virtually any product requiring a push-button mechanism can benefit from compression springs.
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What certifications does SMS Spring hold for its compression spring manufacturing?
SMS Spring is ISO 2015:9001 certified and RoHS compliant. The company also maintains regulatory expertise including REACH compliance, ensuring that all manufactured springs meet international quality and environmental standards.
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What materials are available for custom compression springs?
Compression springs can be manufactured from a variety of raw materials depending on your application requirements. Common material types include carbon steel, stainless steel, nickel alloys, copper alloys, and cobalt alloys. The intended application environment will typically guide the best material selection.
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What are the different shapes of compression springs available?
Compression springs are manufactured in several standard shapes: cone shaped (where the spring radius decreases towards the end, commonly used for battery springs), hour glass (tapering towards the center with larger outer coils), barrel shape (reduced at the ends and wider in the center), and reduced ends (straight across center coils, tapering only near the end coils). Custom designs with unique shapes are also available depending on the application.
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How is spring rate defined and why is it important?
Spring rate is defined as the change in load per unit deflection, measured in pounds per inch (lbs/in) or Newtons per millimeter (N/mm). It is a critical parameter because it determines how much force a spring exerts at a given deflection, directly affecting the performance and suitability of the spring for a specific application.
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Can SMS Spring handle both small-scale prototype orders and large volume production runs?
Yes. SMS Spring is fully equipped to handle both ends of the production spectrum. The company supports short-run R&D prototype projects as well as large, long-run blanket orders that span over a period of years, providing flexible solutions through its global supply chain network and in-house prototype production services.