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A practical guide to spring failure: how to recognise fatigue, set, corrosion, hydrogen embrittlement and other failure modes, what causes each one, and how to prevent it. Includes a checklist for investigating a broken spring.
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A practical spring design guide for helical compression springs. Start from the loads, travel and space, choose the material, wire and coil diameter, work out the active coils, then check stress, solid height, buckling, surge and fatigue. Includes a worked example, a design check calculator and a drawing checklist.
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A step-by-step guide to measuring compression, extension and torsion springs: the tools you need, the five basic measurements, how to count coils, length inside hooks, free angle and wind direction, how to measure load and rate, common mistakes, and a measurement sheet for your RFQ.
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A practical guide to the main types of springs: how compression, extension and torsion springs carry load, where wire forms fit, what conical, die, disc, wave, vibrator, constant force and leaf springs do, and how to choose the right type for your application.
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A step-by-step look at how coil springs are made: checking the wire, cold coiling on CNC machines or hot coiling heavy bar, forming hooks and legs, stress relieving, grinding the ends, shot peening and presetting, finishing, and the inspection and load tests before shipment, with photos from our plant.
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A practical guide to double torsion springs: why the two bodies are wound in opposite directions, how the centre loop and legs share the load in the two common load cases, how to calculate rate, torque and stress, how much arbor clearance to leave, a free calculator, and what to put on the drawing.
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A practical guide to spring index: how to calculate C = D/d, why most springs sit between 4 and 12, how the index drives the Wahl stress correction factor, how end type sets pitch and solid height, a free calculator, and what to do when your design falls outside the range.
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A practical guide to spring finishes and coatings: what zinc plating, phosphate, black oxide, powder coating, zinc flake, nickel and passivation each do, why plated high-strength springs must be baked, how coating thickness changes fits, and how to write the finish on a drawing.
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A practical guide to conical springs: the difference between tapered, double conical, hourglass and volute springs, how the coils telescope, why the load curve stiffens and where stress peaks, a free calculator, and what to send a manufacturer.
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A practical guide to specifying a custom wave spring: single-turn, multi-turn or nested, the numbers a manufacturer needs, what sets the rate, how to read the load curve, fit and clearance, and a free relative-rate calculator.
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Bend radius, springback, datums, tolerances, finishes and inspection: how to design a custom wire form that is easy to make and holds size, with an RFQ checklist to copy.
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A practical guide to disc springs and Belleville washers: the four dimensions, how h0/t shapes the load curve, series and parallel stacking, materials, fatigue, and a free stack calculator.
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Spring rate formulas for compression, extension and torsion springs with worked examples, a free calculator, the two-point test method, and how to put rate on a drawing.
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Baler pickup, rake and tedder tines are double torsion springs. This guide shows what to measure on a worn tine, why small changes alter stiffness, and what to send for a replacement quote.
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Length inside hooks, loads at two lengths, initial tension, hook type and bend radius, material and finish: what to send a spring manufacturer for an accurate custom extension spring quote.
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Music wire, hard-drawn carbon, 65Mn, 50CrVA, SWOSC-V, 60Si2Mn and stainless: how Chinese, Japanese, US and European spring wire grades line up, and how to pick one for your spring.
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Leg angles, wind direction, torque at a working angle, arbor clearance and material: what to send a spring manufacturer for an accurate custom torsion spring quote.
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Wire diameter, OD, free length, working loads, material and end type: what to send a spring manufacturer for an accurate custom compression spring quote.
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GB/T 1222-2025, China's revised national standard for spring steels, took effect on May 1, 2026. It merges three earlier standards and makes 14 technical changes. Here's what they are and what spring buyers should check.
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Four spring industry trends for 2026, checked against sources: cleaner, stronger spring steels, composite springs, metal 3D printing and traceability. What each one really means for spring buyers.
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