Torsion Spring

Product Specification

Feature

1. Over 20 years of specialized experience — management and R&D team focused on industrial and garage door torsion springs for more than two decades. 2. High-quality spring steel wire — sourced from domestic well-known brand suppliers, available in 72B, 82B, 60Si2Mn, and 55SiCr. 3. Precision calculation software — international spring calculation software combined with years of practical experience ensures accurate and reliable spring design. 4. Advanced production equipment — domestic advanced manufacturing equipment and technical processes ensure consistent product quality. 5. Strict quality control — every stage from raw material to finished product follows strict quality assurance and control procedures. 6. Excellent fatigue life — tested to over 20,000 cycles without breakage, with load loss less than 15%. 7. Superior corrosion resistance — neutral salt spray test exceeds 72 hours with no rust spots, equivalent to 3 years of regular use. 8. Multiple surface treatments available — cold rolling, medium temperature tempering, anti-rust oil immersion, and electroplating options. 9. Complete accessory system — torsion spring shaft (solid steel, quenched and tempered) and cable drum (cast aluminum, one-piece die-cast) for stable and secure installation. 10. Torsion spring break safety device — installed at the spring end, locks onto the torsion shaft if the spring breaks, preventing door from falling and protecting personnel and property. 11. Wide specification range — available from 1-3/4" to 6" to suit different door sizes and load requirements. 12. Precise manufacturing tolerances — inner diameter tolerance ±1%, coil clearance <0.2mm, coil count tolerance ±1%. 13. Customizable — custom wire diameters, lengths, and rotation directions available upon request. 14. Fast delivery — quick lead times for both standard and custom orders.