Heavy Duty Load Compression Spring Die Springs Yellow-Extra Light O.D:8mm-22mm

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Sale price$2.38 USD
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In stock (500 units), ready to be shipped

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Description

Heavy Duty Die Springs Yellow Extra Light — Reliable Compression for Stamping & Mold Applications

When a stamping die or injection mold fails mid-run because a spring loses its return force, downtime costs add up fast. Engineers, toolmakers, and serious DIY fabricators who need consistent, repeatable spring force turn to die springs rated for industrial-grade cycling. These Yellow-Extra Light die compression springs deliver controlled, low-load return force across a wide range of outer diameters and lengths.

Each spring is manufactured from rectangular cross-section spring steel wire wound to a close-coil helical form. The yellow color coding identifies the Extra Light load class per ISO 10243 / JIS B 5012 standards. Outer diameters span 8 mm (0.31 in) to 22 mm (0.87 in), with lengths ranging from 20 mm (0.79 in) to 175 mm (6.89 in) depending on the variant selected. Available in single-piece or 5-piece packs.

Typical use cases include die-casting and stamping tool return mechanisms, injection mold ejector pin springs, light-load fixture clamping systems, and precision jig assemblies where consistent low-force cycling is required. Long-tail search terms this product addresses: yellow die spring M10 extra light, rectangular wire compression spring for mold, ISO 10243 yellow spring M12, die spring replacement for stamping press.

⚙️ Compatible with standard die spring pockets per ISO 10243 and JIS B 5012 specifications. Verify pocket bore diameter and free length before ordering.

✅ Key Features of These Yellow Extra Light Die Compression Springs

🟡 Yellow Extra Light Load Class

Color-coded yellow per ISO 10243 / JIS B 5012 for instant load-class identification on the shop floor.

📐 Wide Size Range

Outer diameters from M8 to M22 and lengths from 20 mm to 175 mm — one listing covers the most common die spring pocket sizes.

🔩 Rectangular Wire Cross-Section

Flat-wire winding maximizes energy storage per unit length compared to round-wire springs of the same envelope size.

🔄 Consistent Return Force

Engineered for repeatable cycling in stamping, molding, and fixture applications where spring fatigue causes costly rejects.

📦 Single or 5-Pack Options

Order one for a quick replacement or a 5-pack for toolroom stock — both options available for every size combination.

🏭 Industrial-Grade Cycling Durability

Designed for high-cycle tooling environments; suitable for stamping dies, injection molds, and precision jig assemblies.

📐 Technical Specifications — Yellow Extra Light Die Compression Springs

Load Class Extra Light (Yellow)
Standard ISO 10243 / JIS B 5012
Wire Cross-Section Rectangular (flat wire)
Outer Diameter Range 8 mm – 22 mm (0.31 in – 0.87 in)
Length Range 20 mm – 175 mm (0.79 in – 6.89 in)
Material Spring steel (rectangular cross-section)
Surface Finish Yellow paint coating (load-class identification)
Coil Type Close-coil helical compression
Ends Closed and ground (flat ends)
Deflection Rate See variant options
Max Deflection See variant options
Pack Quantity 1 pc or 5 pcs (select above)

❓ Frequently Asked Questions

How do I choose the right outer diameter and length for my die?

Match the outer diameter (O.D.) to your die spring pocket bore — the spring O.D. should be 0.5–1 mm smaller than the pocket bore for a sliding fit. For length, select a free length that gives you the required working stroke plus at least 15–20% safety margin before solid height is reached. Refer to your die drawing for pocket depth and required stroke.

What does "Yellow Extra Light" mean, and when should I use it?

Yellow is the ISO 10243 / JIS B 5012 color code for the Extra Light load class — the lowest spring rate in the standard die spring family. Use Extra Light springs where low return force is needed, such as light-duty ejector pins, thin-material strippers, or applications where excessive force would damage the workpiece or tooling.

Are these springs compatible with standard die spring pockets?

Yes. These springs are dimensioned to ISO 10243 and JIS B 5012 standards, which define the same pocket geometry used by most toolmakers worldwide. Always verify the pocket bore diameter and free-length clearance against your specific tool drawing before ordering.

How many cycles can these die springs handle?

Die springs manufactured to ISO 10243 are typically rated for 500,000 to 1,000,000 cycles at the recommended working deflection (typically 20–30% of free length for Extra Light class). Exceeding the rated deflection significantly reduces fatigue life. For exact cycle ratings at your working deflection, contact us to confirm.

Can I use these springs in injection molds as ejector pin return springs?

Yes. Yellow Extra Light die springs are commonly used as ejector pin return springs in injection molds where low return force is sufficient. Ensure the spring O.D. clears the ejector pin and that the pocket depth accommodates the compressed length at full ejector stroke.

What is the difference between buying 1 pc vs. 5 pcs?

Both options are the same spring — the 5-pack simply provides five identical springs at a lower per-unit cost. The 5-pack is ideal for toolroom stock, replacing multiple springs in a die set at once, or keeping spares on hand for planned maintenance intervals.

Do these springs require any surface treatment or lubrication?

The yellow paint coating provides basic corrosion protection during storage and handling. For extended service life in tooling applications, light lubrication with a die spring grease or oil at installation is recommended. Avoid running springs dry in high-cycle applications as this accelerates wear on the coil surfaces.

🛒 Select your Outer Diameter × Length and Qty above, then add to cart.

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