This page explains how Torsion Spring is classified within Fabricated Metal Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
A torsion spring is a helical spring that exerts torque or rotary force when twisted, used to store and release angular energy.
Technical details and manufacturing context for Torsion Spring
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Wire Diameter | 0.1–12 mm | Range of wire diameters availableISO 10243 |
| Coil Diameter (Outer) | 1–80 mm | Outer diameter range |
| Free Length | 2–200 mm | Length of spring in unloaded state |
| Total Coils | 3–20 coils | Number of coils including ends |
| Spring Rate | 0.01–50 N·mm/deg | Torque per degree of deflection |
| Maximum Deflection | ≤360 deg | Maximum angular deflection without permanent set |
| Tolerance on Wire Diameter | ±0.01–±0.05 mm | Precision class dependentISO 10243 |
| Tolerance on Free Angle | ±2–±5 deg | Angular tolerance between legs |
| Surface Finish | Shot peened, oiled, or coated | Typical finishes for corrosion resistance and fatigue |
| Operating Temperature Range | -40 to 150 °C | Depends on material; stainless up to 250°C |
| Fatigue Life | 10,000–1,000,000 cycles | Expected cycles for specified load |
| End Configuration | Straight, offset, or special | Legs can be straight or bent to fit application |
| Test Method | Torque test at specified angle | Verification of spring rate and torqueISO 26909 |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
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Torsion springs can be made from spring steel (EN 10270-1: DH, SH), stainless steel (AISI 302, 316, 17-7 PH), music wire (ASTM A228), oil-tempered wire (ASTM A229), chrome-vanadium steel (ASTM A231), and chrome-silicon steel (ASTM A401). The choice depends on the application requirements such as corrosion resistance, temperature, and fatigue life.
Key parameters include wire diameter (0.1–12 mm), outer coil diameter (1–80 mm), free length (2–200 mm), total coils (3–20), spring rate (0.01–50 N·mm/deg), maximum deflection (≤360°), tolerances on wire diameter (±0.01–±0.05 mm) and free angle (±2–±5°), operating temperature range (-40 to 150°C), and fatigue life (10,000–1,000,000 cycles).
The spring rate (torque per degree) is determined by material properties, wire diameter, coil diameter, and number of active coils. It is verified by a torque test at a specified angle according to ISO 26909.
Relevant standards include ISO 10243, DIN 2088, EN 10270-1, ASTM A228, A229, A231, A401, and GB/T 1239.2. These standards provide specifications for materials, dimensions, and testing. Always confirm compliance with the manufacturer.
Commonly used trade names and technical identifiers for Torsion Spring.
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