Large Extension Springs
Our factory manufactures robust large extension springs with wire diameters ranging from 3mm to 16mm and outer diameters from 20mm to 150mm. Free length can be customized from 200mm to 2000mm to withstand heavy tensile loads. Reinforced hook structures and standardized heat treatment greatly extend the service life of each large extension springs.
Load-Bearing & Structural Strength
Strong load capacity
Fabricated with thick high-strength spring steel to endure massive tensile force.
Solid structure
Heavy-duty end hooks including round hooks, long hooks, flat hooks and lifting rings deliver stable connection without deformation.
Wide dimensional coverage
Maximum free length reaches 2000mm and maximum outer diameter hits 150mm to match oversized equipment installation space.
Excellent anti-fatigue performance
Premium alloy spring steel processed via standardized heat treatment resists fatigue failure under repeated tension cycles.
Materials & Surface Treatment
Optional raw materials: carbon spring steel (65Mn / 82B), alloy spring steel (60Si2Mn / 55CrSi). Surface anti-rust options: plastic coating, electrophoresis, zinc plating and black oxide for outdoor and industrial working environments.
Application Fields
Mainly used for mechanical equipment, lifting machinery, elevator fittings, automobiles, mining equipment and large hardware requiring heavy tensile loads.
Large Spring Production Strength
Baoding Zhongxin Spring Manufacturing Co., Ltd. holds 7 years of spring production experience with multiple large-scale spring forming machines, capable of producing springs with maximum wire diameter 22mm and maximum outer diameter 180mm. We adopt dedicated hot coiling and heat treatment processes for heavy-duty elastic parts like large extension springs to balance strength and toughness. Mature production processes cover large compression springs, tension springs, vehicle springs and industrial elastic components to stably fulfill bulk orders of oversized springs.
Product Parameter Table
|
Parameter Item |
Value / Range |
|
Wire Diameter Range |
3 mm ~ 16 mm |
|
Outer Diameter Range |
20 mm ~ 150 mm |
|
Free Length |
200 mm ~ 2000 mm (Customizable) |
|
End Hook Types |
Round hook, long hook, flat hook, lifting ring (Customizable) |
|
Optional Materials |
Carbon Spring Steel (65Mn / 82B), Alloy Spring Steel (60Si2Mn / 55CrSi) |
|
Surface Treatment |
Plastic Coating / Electrophoresis / Zinc Plating / Black Oxide |
|
Customization Mode |
Customized per drawings, samples or tensile load requirements |
|
Application Scenarios |
Mechanical equipment, lifting machinery, elevator fittings, automobiles, mining equipment, large hardware |
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