Extension Springs

At Spring World Factory, we combine advanced engineering with high-precision CNC coiling to produce extension springs that deliver consistent tension, accurate initial load, and long-lasting performance. Our springs are designed to meet the exact functional needs of applications ranging from heavy lifting systems to delicate precision instruments.

Applications

Extension springs are widely used in a range of applications, including:

• Construction & Agriculture: Hand tools, hoists, plows, harvesters, and balers.

• Lifting & Doors: Cranes, garage doors, elevators, and counterbalance mechanisms.

• Heavy Machinery: Presses, mining equipment, and hydraulic systems.

• Automotive: Seat mechanisms, latches, drum brakes, and suspension assemblies.

• Precision & Medical: Medical tools, scales, micro actuators, and controllers.

• Household: Appliances, trampolines, and cleaning devices.

Material & Technical Specifications

• Materials: Carbon steel (Music Wire, Oil Tempered), Alloy steel (Chrome Silicon/Vanadium), Stainless steel (302, 304, 316, 17-7PH), Nickel alloys (Inconel, Monel), and Copper alloys.

• Wire Diameter: 0.2 mm up to 25 mm.

• Spring Design: Machine hooks, full loops, swivel hooks, Crossover, Centerloop, and threaded inserts.

• Performance: Uniform tension, high fatigue resistance, and stable elasticity.

• Surface Protection: Powder coating, electrophoretic coating, galvanizing, and corrosion-resistant treatments.

Quality Assurance

• Full inspection of raw materials with complete production traceability.

• Laboratory testing for load characteristics, initial tension, and maximum extension.

• Compliance with international manufacturing standards.

• Continuous improvement programs ensuring extended spring life.