Resource Center
Access technical documentation, design formulas, CAD templates, material data, and industry whitepapers to accelerate your spring selection.
Technical Documentation
Technical Notes & Tolerances
Complete guidelines on DIN, ISO, and ASTM precision spring tolerances.
Material Specifications & Metallurgy
Mechanical property charts for music wire, stainless steels, and superalloys.
Surface Coatings & Finishes
Corrosion protection options: zinc plating, passivating, Geomet, and PTFE.
Catalog & Part Numbering Guide
Standard stock numbering logic and downloadable master PDF catalogs.
Engineering Knowledge Hub
Stock Springs Guide
Navigate over 30,000+ ready-to-ship standard precision spring items.
Custom Spring Engineering
Step-by-step custom DFM review, rapid prototyping, and production tooling.
Compression Springs Guide
Working mechanics, spring index, Wahl factor, and end configurations.
Extension Springs Guide
Initial tension calibration, hook geometries, and dynamic fatigue.
Torsion Springs Guide
Rotational torque equations, winding direction rules, and leg styles.
Engineering Glossary
Bilingual English-Chinese dictionary of standard mechanical spring terminology.
Industry Solutions
Automotive Industry
Suspension, transmission, and EV powertrain springs.
New Energy & EV
Battery pack compression, busbars, and charging stations.
Medical & Healthcare
Biocompatible 316L and titanium springs for surgical tools.
Industrial Machinery
Hydraulic, pneumatic, and automated production machinery.
Electronics & Electrical
Precision micro contacts, switches, and battery springs.
Valves & Flow Control
Extreme-temperature Inconel and Hastelloy springs.
Aerospace & Defense
MIL-SPEC MS24585 flight control actuators and satellites.
Why Choose TOSTA
Extensive Selection
Over 30,000+ precision standard spring part numbers available in stock.
Rapid Fulfillment
Standard catalog items ship within 24 hours; custom samples delivered in 1–3 business days.
Expert Engineering
Dedicated application engineers ready to review your CAD models, loads, and FEA stresses.
Need Dedicated Engineering Guidance?
Our engineering specialists provide 1-on-1 calculation support, FEA simulations, custom CAD files, and material consulting.