Light/Medium/Heavy Load Duty Die Springs Mould Compression Die Spring OD 20-22mm

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Light/Medium/Heavy Load Duty Die Springs Mould Compression Die Spring OD 20-22mm

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Size (OD*ID*Length): M20x10x25

Colors: Yellow

Packaging Quantity: 1 Pcs

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$8.21 USD

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In stock (500 units), ready to be shipped

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Compression Die Springs OD 20–22mm — Reliable Mould Force for Every Load Requirement

When a worn or undersized die spring causes inconsistent ejection, premature mold damage, or unexpected downtime, engineers and toolmakers need a direct replacement they can trust. These compression die springs are designed for mould bases, stamping dies, and injection tooling where consistent spring force and dimensional accuracy are non-negotiable.

Each spring is manufactured from high-grade chromium-silicon alloy steel with a rectangular wire cross-section, providing a higher load capacity per unit length than round-wire alternatives. Available in two outer diameter series — OD 20mm (ID 10mm) and OD 22mm (ID 11mm) — with lengths ranging from 25mm to 175mm (approximately 0.98 in to 6.89 in). Color coding follows the ISO 10243 / JIS B 5012 standard: Yellow (light load), Blue (medium load), Red (heavy load), Green (extra-heavy load), and Brown (ultra-heavy load).

Typical applications include plastic injection mold ejector systems, progressive stamping die strippers, punch and die assemblies requiring controlled return force, and fixture clamping mechanisms in precision machining. Long-tail use cases: replacement compression spring for mold base OD 20mm, rectangular wire die spring M22 heavy load, color-coded ISO die spring for stamping tooling.

🔧 Compatibility: Fits standard mold base spring pockets for OD 20mm and OD 22mm bores. Compatible with DME, HASCO, Meusburger, and equivalent mold base systems. Verify bore diameter, free length, and load class before ordering.

✅ Key Features of These Compression Die Springs

🟡🔵🔴🟢🟤 ISO Color-Coded Load Classes

Yellow = light, Blue = medium, Red = heavy, Green = extra-heavy, Brown = ultra-heavy. Select the correct load class for your tooling cycle requirements without guesswork.

📐 Rectangular Wire Cross-Section

Flat-wound wire geometry delivers a higher load-to-length ratio compared to round-wire springs, maximizing force output within tight mold pocket depths.

⚙️ Two OD Series: 20mm & 22mm

OD 20mm with ID 10mm and OD 22mm with ID 11mm cover the most common mold base spring pocket sizes. Lengths from 25mm to 175mm suit short-stroke and deep-pocket applications alike.

🛡️ Chromium-Silicon Alloy Steel

Cr-Si steel construction provides elevated fatigue resistance and maintains spring rate stability across repeated compression cycles in high-frequency stamping and molding operations.

🔁 Consistent Spring Rate & Deflection

Precision coiling ensures repeatable deflection characteristics, reducing variation between spring replacements and maintaining uniform ejection or stripping force across the tool.

📦 Single-Piece Ordering Available

Order exactly the quantity you need — available in 1 Pcs packaging, ideal for maintenance replacements, prototyping, or small-batch tooling builds without minimum order constraints.

📐 Technical Specifications — Compression Die Springs

Spring Type	Rectangular Wire Compression Die Spring
Outer Diameter (OD)	20mm / 22mm
Inner Diameter (ID)	10mm (OD 20 series) / 11mm (OD 22 series)
Free Length Range	25mm – 175mm (0.98 in – 6.89 in)
Wire Cross-Section	Rectangular (flat wound)
Material	Chromium-Silicon Alloy Steel (Cr-Si)
Load Class / Color	See variant options (Yellow / Blue / Red / Green / Brown)
Spring Rate	See variant options
Max Deflection	See variant options
Surface Finish	Shot-peened, stress-relieved
Standard Reference	ISO 10243 / JIS B 5012 (color coding)
Packaging Quantity	1 Pcs per order unit

❓ Frequently Asked Questions

How do I choose the correct length for my mold spring pocket?

Measure the depth of the spring pocket in your mold base and add the required working stroke. A common rule of thumb is to select a free length approximately 2–3× the required deflection to keep the spring within its safe working range (typically 20–30% of free length for light load, up to 40% for heavy load). Always confirm the deflection percentage against the manufacturer's load-deflection chart for the specific color class.

What is the difference between the color-coded load classes?

The color coding follows ISO 10243 / JIS B 5012 standards: Yellow is light load (lowest spring rate), Blue is medium load, Red is heavy load, Green is extra-heavy load, and Brown is ultra-heavy load (highest spring rate). Heavier load classes produce more force at the same deflection and are used where higher ejection or stripping forces are required.

Are these springs compatible with HASCO, DME, and Meusburger mold bases?

Yes. The OD 20mm and OD 22mm dimensions correspond to standard spring pocket sizes used in HASCO, DME, Meusburger, and equivalent European and Asian mold base systems. Always verify the bore diameter and counterbore depth in your specific mold base drawing before ordering to confirm fit.

What material are these die springs made from, and how does it affect corrosion resistance?

These springs are made from chromium-silicon (Cr-Si) alloy steel, which offers good fatigue strength and moderate corrosion resistance compared to standard carbon steel. For environments with coolant exposure or high humidity, consider applying a light oil coating during storage and installation. If your application requires enhanced corrosion resistance, contact us to confirm availability of surface-treated options.

Why use a rectangular wire spring instead of a round wire spring?

Rectangular (flat) wire springs have a higher fill factor within a given spring pocket — more steel cross-section per unit of coil space — which translates to a higher load capacity and energy storage for the same OD, ID, and free length. This makes them the standard choice for die and mold applications where space is constrained but force requirements are high.

Can I use a longer spring in a shorter pocket by pre-compressing it?

It is not recommended to install a spring that requires more than its rated maximum deflection to fit the pocket. Exceeding the maximum deflection causes coil clash, accelerated fatigue, and premature failure. Always select a free length that allows the spring to operate within its rated deflection range for the chosen load class.

How do I decide between OD 20mm and OD 22mm for my application?

The choice is determined by the spring pocket bore diameter in your mold or die. OD 20mm springs fit 20mm bore pockets (ID 10mm guide pin), while OD 22mm springs fit 22mm bore pockets (ID 11mm guide pin). Check your mold base drawing or measure the existing spring's outer diameter with calipers to confirm the correct series.

🛒 Select your Size (OD×ID×Length), Color (load class), and Packaging Quantity above, then add to cart.