We work with: High-carbon steel (Grade 65Mn/70Mn) – most common for industrial use Stainless steel (301/302/304/316) – corrosion resistance Alloy steel (50CrV/55CrSi/60Si2Mn) – high-temperature resistance Custom materials (available upon request)

Heavy-Duty Die Springs for Mold & Stamping Applications
GL Springs is a leading die spring manufacturer in China, offering high-quality die springs (mold springs) designed for heavy-load, high-frequency applications in mold, stamping, and forming machinery. Our die springs feature high load capacity, excellent fatigue resistance, and long service life, meeting the strict requirements of industrial mold systems.

Core Specifications

Wire Diameter: 2mm – 20mm
Outer Diameter: 10mm – 100mm
Free Length: 10mm – 500mm
Load Class: Light (L), Medium (M), Heavy (H), Extra Heavy (XH), Super Heavy (SH)
Material: Chrome Silicon Steel (55CrSi), Chrome Vanadium Steel (50CrV), Stainless Steel (304, 316)
Load Capacity: 50N – 200,000N
Surface Treatment: Yellow Zinc Plating, Black Oxide, Nickel Plating, Powder Coating
Standards: ISO 10243, DIN 2092, JIS B2708, GB/T 1972

Applications

Our die springs are specifically designed for mold and stamping equipment, widely used in:

Metal Stamping Molds: Blanking, punching, bending, drawing molds
Injection Molds: Ejector systems, core pulling mechanisms
Die Casting Molds: Mold clamping, ejection components
Automotive Manufacturing: Body stamping, chassis component forming
Heavy Industrial Machinery: Forging equipment, press machines

GL Springs Advantages

High Load Capacity: Chrome silicon steel material ensures excellent tensile and compressive strength
Excellent Fatigue Resistance: Strict heat treatment process (quenching + tempering) guarantees service life ≥ 2,000,000 cycles
Standard & Custom Options: Available in standard load classes and custom sizes/load requirements
Reliable Quality: 100% load testing and dimensional inspection before delivery

CUSTOM SPRINGS,FROM CONCEPT TO COMPLETION

We are responsible for all aspects from the design stage to mass production.

Spring Design

We’ll work closely with your team to design a custom spring solution.

Manufacturing

For over 20 years, we’ve produced a large array of custom springs in a variety of materials.

Quality Control

Precision Reliability in Every Spring.

Package & Delivery

On-Time Secure Shipping for Custom Springs.

Brands That Trust Us

Trusted By Over 2000+ Brands

FAQ

Are you a factory or trading company? Where is the company located?

We are a leading manufacturer of high-precision springs with IATF 16949 certification, located in Shanghai.

What materials do you use for springs?

We work with:

High-carbon steel (Grade 65Mn/70Mn) – most common for industrial use
Stainless steel (301/302/304/316) – corrosion resistance
Alloy steel (50CrV/55CrSi/60Si2Mn) – high-temperature resistance
Custom materials (available upon request)

Can you produce non-standard springs?

Yes! We specialize in:

Custom shapes (Conical, Barrel, Double torsion)
Special surface treatments (Electroplating, Powder coating, Electrophoretic coating)
Extreme-condition springs (High temperature / Cryogenic)

Can you match competitor samples?

We offer reverse engineering services:

Send samples (3–5 pcs ideal)
We’ll analyze material & performance
Provide matched prototypes within 7 days

Do you provide free samples?

Existing catalog items (≤5 pcs): you only pay actual shipping cost.
Custom sample service: $50 refundable fee (deducted from future orders).

How long does it take for samples?

Typically 5-7 business days. Depends on your request.

Get custom service now

Please inform us about the quantity and application of your custom springs. Based on this information, we will connect you with a specialized engineer who possesses the expertise to address your specific requirements.