Springs
Compression, extension, torsion, die and constant-force springs.
Also searched as: compression springsextension springtorsion springdie springs
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2'' x 28'' Left Wind Garage Door Torsion Spring
Length: 28 inWind Direction: Left
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Extension Spring
Outside Diameter: 0.36 inchOverall Length: 6 inchType: High Precision
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Extension Spring
Wire Diameter: 0.072 inch
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Extension Spring
End Type: Full Twist LoopInitial Tension: 3.8 lbsOutside Diameter: 1.000 inchOverall Length: 3 inchWire Diameter: 0.105 inch
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Extension Spring
Overall Length: 8 inchType: High Precision
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Extension Spring
Outside Diameter: 0.531 inchOverall Length: 5 1/4 inchWire Diameter: 0.062 inch
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Extension Spring
Outside Diameter: 25 mmType: Metric - Looped End ExtensionWire Diameter: 3.6 mm
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Garage Door Extension Spring
Color Code: GreenDoor Height: 8 ftLoad Rating: 120 lbStretch: 27 inch to 48 inch
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Garage Door Torsion Spring, 20 in L, 150 lb
Color: BlueDimensions: 0.218" X 1-3/4" X 20"Length: 20 inLoad: 150 lb
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Torsion Spring, 270 Deg, 0.826 OD
Deflection Angle: 270 DegOutside Diameter: 0.826 inWind Direction: Right HandWire Diameter: 0.070 in
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Torsion Spring, 360 Deg, 0.271 in OD, Plain Finish
Deflection Angle: 360 DegOutside Diameter: 0.271 inWind Direction: Left HandWire Diameter: 0.021 in
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Torsion Spring, 90 Deg, 0.848 OD
Deflection Angle: 90 DegLeg Length: 3.5 inMax. Rod Outside Diameter: 0.5 inOutside Diameter: 0.848 inSpring Length @ Torque: 0.449 in
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Torsion Spring, 90 Deg, 0.848 in OD, 0.105 in Wire Dia.
Deflection Angle: 90 DegOutside Diameter: 0.848 inWind Direction: Right HandWire Diameter: 0.105 in
About springs
Springs are mechanical devices designed to store and release elastic energy, typically in response to a compressive, tensile, or torsional force. The primary types include compression springs, which resist compressive loads along their axis; extension springs, which resist tensile loads and often feature hooks or loops at their ends; torsion springs, which apply torque or store rotational energy; and die springs, a heavy-duty variant of compression springs characterized by rectangular wire and high load capacities. Constant-force springs maintain a near-constant force throughout their deflection. Key selection parameters include spring rate (k), free length, solid height, outside diameter (OD), inside diameter (ID), wire diameter, maximum deflection, and maximum load. Materials commonly include music wire (ASTM A228), stainless steel (e.g., 302, 17-7 PH), chrome silicon (ASTM A401), and phosphor bronze. Finishes like zinc plating, black oxide, and shot peening are used for corrosion resistance, enhanced fatigue life, or aesthetic purposes.
How to choose
When selecting a spring, first define the application's force and deflection requirements. Is it a compressive, tensile, or torsional load? This determines the spring type. For compression or extension springs, specify the required spring rate (N/mm or lb/in) and the maximum working load and deflection. Next, consider the available space envelope, defining the maximum OD and minimum ID. Evaluate the operating environment for temperature, corrosion, and fatigue life to select an appropriate material and finish. Finally, verify that the chosen spring's solid height for compression springs, or maximum extension for extension springs, is compatible with the design constraints, ensuring it does not exceed material stress limits.