Compression Die Spring Brown - TB Heavy Load Duty Mold Mould Springs OD 8-40mm
Compression Die Spring Brown - TB Heavy Load Duty Mold Mould Springs OD 8-40mm
Compression Die Spring Brown - TB Heavy Load Duty Mold Mould Springs OD 8-40mm
Compression Die Spring Brown - TB Heavy Load Duty Mold Mould Springs OD 8-40mm
Compression Die Spring Brown - TB Heavy Load Duty Mold Mould Springs OD 8-40mm
Compression Die Spring Brown - TB Heavy Load Duty Mold Mould Springs OD 8-40mm
Compression Die Spring Brown - TB Heavy Load Duty Mold Mould Springs OD 8-40mm
Compression Die Spring Brown - TB Heavy Load Duty Mold Mould Springs OD 8-40mm
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Compression Die Spring Brown - TB Heavy Load Duty Mold Mould Springs OD 8-40mmCompression Die Spring Brown - TB Heavy Load Duty Mold Mould Springs OD 8-40mmCompression Die Spring Brown - TB Heavy Load Duty Mold Mould Springs OD 8-40mmCompression Die Spring Brown - TB Heavy Load Duty Mold Mould Springs OD 8-40mmCompression Die Spring Brown - TB Heavy Load Duty Mold Mould Springs OD 8-40mmCompression Die Spring Brown - TB Heavy Load Duty Mold Mould Springs OD 8-40mmCompression Die Spring Brown - TB Heavy Load Duty Mold Mould Springs OD 8-40mmCompression Die Spring Brown - TB Heavy Load Duty Mold Mould Springs OD 8-40mm

Compression Die Spring Brown - TB Heavy Load Duty Mold Mould Springs OD 8-40mm

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By HomeDIYer®

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$3.10 USD
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In stock (500 units), ready to be shipped

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Description

Compression Die Spring Brown — Reliable Heavy-Load Force for Mold & Automation Applications

When your mold, press, or automation fixture demands consistent, repeatable force cycle after cycle, an undersized or wrong-grade spring becomes the weakest link in the entire system. These Brown (TB) compression die springs are engineered for heavy-load duty, giving engineers, toolmakers, and serious DIY makers a dependable solution that holds its rated force even under sustained compression and elevated temperatures.

Each spring is manufactured from high-grade chromium-silicon alloy steel wire, cold-coiled and shot-peened for fatigue resistance. The distinctive brown powder-coat finish identifies the TB (heavy) load class per ISO 10243 / JIS B 5012 standards. Available outer diameters (OD) range from 8mm to 40mm (approximately 0.31" to 1.57"), with inner diameters (ID) sized at 50% of OD for standard guide-pin compatibility. Free lengths span 20mm to 200mm (approximately 0.79" to 7.87"), covering a wide range of die heights and stroke requirements.

Typical use cases include injection mold stripper plates requiring heavy return force, stamping and blanking dies where consistent blank-holder pressure is critical, and custom automation jigs or fixtures where a compression die spring for heavy-load mold applications must maintain force over millions of cycles without significant set.

⚙️ Compatibility: Designed for standard guide-pin and guide-bush systems. OD/ID ratio follows ISO 10243 / JIS B 5012 TB (heavy) load class. Verify free length, OD, ID, and stroke against your die design before ordering.

✅ Key Features of These Compression Die Springs

🟤 Brown TB Heavy-Load Class

Rated to the TB (heavy) load class per ISO 10243 / JIS B 5012, delivering higher spring force per unit deflection than light or medium grades — ideal for stripper plates and blank holders.

🔩 Chromium-Silicon Alloy Steel

Cold-coiled from Cr-Si alloy wire for superior fatigue life and resistance to heat relaxation, maintaining rated force across extended production runs.

📐 Wide Size Range

OD 8–40mm × ID 4–20mm, free lengths 20–200mm (select sizes up to 200mm). Covers the majority of standard die spring pockets without custom fabrication.

🛡️ Shot-Peened for Fatigue Resistance

Shot-peening introduces compressive residual stress on the wire surface, significantly extending fatigue life under repeated compression cycles in high-duty tooling.

🎯 Standard Guide-Pin Compatible

ID is sized at 50% of OD, matching standard guide-pin diameters used in injection molds, stamping dies, and progressive tooling worldwide.

📦 Sold Individually — Mix Sizes Freely

Each listing is priced per piece (1 PCS), so you can order exactly the quantity and size combination your project requires without buying full packs.

📐 Technical Specifications — Compression Die Springs

Load Class TB — Heavy Load (Brown)
Standard ISO 10243 / JIS B 5012
Material Chromium-Silicon (Cr-Si) Alloy Steel
Surface Treatment Shot-peened; Brown powder-coat finish
Outer Diameter (OD) 8mm – 40mm (0.31" – 1.57")
Inner Diameter (ID) 4mm – 20mm (0.16" – 0.79")
Free Length 20mm – 200mm (0.79" – 7.87") — see variant options
Coil Direction Right-hand
Max Operating Temperature Typically up to 120°C (248°F)
Recommended Max Deflection See variant options (typically 30–40% of free length for TB class)
Packing 1 PCS per order unit

❓ Frequently Asked Questions

How do I choose the right OD and ID for my die spring pocket?

Measure the spring pocket diameter in your mold or die plate — the spring OD should be 0.5–1mm smaller than the pocket bore for clearance. The ID should be 0.5–1mm larger than your guide pin diameter. For example, if your pocket is 16.5mm and your guide pin is 8mm, select OD 16mm × ID 8mm.

What does the Brown (TB) color code mean?

Die spring load classes are color-coded per ISO 10243 / JIS B 5012. Brown indicates the TB (heavy) load class, which has the highest spring rate among the standard four classes (Light/Blue, Medium/Red, Heavy/Brown, Extra-Heavy/Green). Brown springs exert more force per mm of deflection than blue or red springs of the same size.

How do I select the correct free length?

Free length should be chosen so that the spring operates within its recommended deflection range — typically 30–40% of free length for TB heavy-load class. Calculate: required stroke ÷ 0.35 ≈ minimum free length. Always add a pre-load of 5–10% of free length to keep the spring seated during operation.

Are these springs corrosion-resistant?

The brown powder-coat finish provides a basic level of corrosion protection suitable for indoor tooling environments. For applications exposed to coolant, cutting fluids, or high humidity, consider applying a light oil coating or consult your tooling engineer about additional protective measures.

Can I use these springs in injection molds and stamping dies?

Yes. These compression die springs are designed specifically for mold and die applications including injection mold stripper plates, blank holders in stamping dies, progressive die lifters, and similar tooling where consistent, repeatable force is required over millions of cycles.

What is the maximum operating temperature for these springs?

Chromium-silicon alloy die springs are typically rated for continuous operation up to approximately 120°C (248°F). Exceeding this temperature can cause accelerated stress relaxation and loss of rated force. For higher-temperature applications, consult a spring specialist for heat-resistant alloy options.

How many pieces will I receive per order?

Each order unit is 1 PCS (one piece). Select the exact OD × ID size and free length you need from the variant dropdowns, then adjust quantity in your cart to order multiple pieces of the same specification.

🛒 Select your OD × ID size and length above, then add to cart.

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