Heavy Load Duty Compression Die Spring ISO - 30mm to 50mm Outer Diameter
Heavy Load Duty Compression Die Spring ISO - 30mm to 50mm Outer Diameter
Heavy Load Duty Compression Die Spring ISO - 30mm to 50mm Outer Diameter
Heavy Load Duty Compression Die Spring ISO - 30mm to 50mm Outer Diameter
Heavy Load Duty Compression Die Spring ISO - 30mm to 50mm Outer Diameter
Heavy Load Duty Compression Die Spring ISO - 30mm to 50mm Outer Diameter
Heavy Load Duty Compression Die Spring ISO - 30mm to 50mm Outer Diameter
Heavy Load Duty Compression Die Spring ISO - 30mm to 50mm Outer Diameter
Roll over image to zoom in Click on image to zoom
Heavy Load Duty Compression Die Spring ISO - 30mm to 50mm Outer DiameterHeavy Load Duty Compression Die Spring ISO - 30mm to 50mm Outer DiameterHeavy Load Duty Compression Die Spring ISO - 30mm to 50mm Outer DiameterHeavy Load Duty Compression Die Spring ISO - 30mm to 50mm Outer DiameterHeavy Load Duty Compression Die Spring ISO - 30mm to 50mm Outer DiameterHeavy Load Duty Compression Die Spring ISO - 30mm to 50mm Outer DiameterHeavy Load Duty Compression Die Spring ISO - 30mm to 50mm Outer DiameterHeavy Load Duty Compression Die Spring ISO - 30mm to 50mm Outer Diameter

Heavy Load Duty Compression Die Spring ISO - 30mm to 50mm Outer Diameter

HomeDIYer
No reviews

By HomeDIYer®

Price:
$4.96 USD
Stock:
In stock (500 units), ready to be shipped

Payment & Security

Ach Direct Debit Amazon American Express Apple Pay Bancontact BLIK Diners Club Discover EPS Google Pay iDEAL Wero JCB Maestro Mastercard Multibanco MobilePay PayPal Przelewy24 Shop Pay Twint Union Pay USDC Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Limited Offer — Spend More, Save More
Spend $55+
Save $5
Spend $100+
Save $10
Spend $200+
Save $25
✅ Discount applied automatically at checkout 🚚 Free shipping on orders over $89
HomeDIYer DIY Expert Support

DIY Expert Support

Get fitment advice & recommendations

Mon–Fri  8:30 AM – 8:00 PM
WhatsApp
24-Hour Fast Ship
Arrives in 3–14 Days
Worldwide Shipping
30-Day Returns
1 tree planted with every purchase

Description

Heavy Load Duty Compression Die Springs — ISO-Standard Force in Every Stroke

When a worn-out spring causes a die to misfire or a press to lose consistent force, the entire production run is at risk. Engineers, toolmakers, and workshop operators who rely on repeatable clamping and ejection forces need a spring they can count on cycle after cycle. These heavy load duty compression die springs are built for exactly that — delivering controlled, consistent resistance in demanding mechanical environments.

Each spring is manufactured to ISO 10243 standards from high-tensile chromium-silicon alloy steel wire, wound to tight dimensional tolerances. Outer diameters span 35 mm (1.38 in) to 50 mm (1.97 in), with inner diameters of 17.5 mm (0.69 in), 20 mm (0.79 in), and 25 mm (0.98 in) respectively. Free lengths range from 30 mm (1.18 in) up to 500 mm (19.69 in) depending on the selected variant. Color-coded ends identify the load class: Yellow (TF) = light load, Blue (TL) = medium load, Red (TM) = heavy load, Green (TH) = extra-heavy load, Brown (TB) = ultra-heavy load.

Typical applications include stamping and punching die sets requiring heavy load compression springs, injection mold ejector pin return springs, hydraulic press guide spring assemblies, and industrial fixture clamping spring replacements. The ISO color-grade system makes it straightforward to cross-reference and substitute springs in existing tooling designs.

🔧 Compatible with ISO 10243 die spring pockets. Verify OD, ID, and free length against your tooling drawing before ordering.

✅ Key Features of These Heavy Load Compression Die Springs

🏋️ISO 10243 Heavy Load Rating

Engineered to meet ISO 10243 dimensional and force standards, ensuring drop-in compatibility with standard die spring pockets across tooling platforms.

🎨Color-Coded Load Grade System

Five distinct color grades — Yellow, Blue, Red, Green, and Brown — allow instant visual identification of load class, reducing assembly errors in multi-spring tooling setups.

⚙️Chromium-Silicon Alloy Steel Construction

Wound from high-tensile Cr-Si alloy wire for superior fatigue resistance and stable spring rates under repeated compression cycles in press and die applications.

📐Wide Size Range — OD 35 mm to 50 mm

Three outer diameter groups (35 mm / 40 mm / 50 mm) with matched inner diameters and free lengths from 30 mm to 500 mm cover a broad range of tooling pocket specifications.

🔄Consistent Deflection Repeatability

Tight winding tolerances maintain consistent spring rate and deflection characteristics across the full compression stroke, critical for precision stamping and forming operations.

🛡️Corrosion-Resistant Surface Finish

Springs feature a protective surface treatment that resists oxidation in typical workshop and industrial environments, extending service life between replacements.

📐 Technical Specifications — Compression Die Springs

Standard ISO 10243
Material Chromium-Silicon (Cr-Si) alloy steel
Outer Diameter (OD) 35 mm / 40 mm / 50 mm (see variant options)
Inner Diameter (ID) 17.5 mm / 20 mm / 25 mm (matched to OD)
Free Length 30 mm – 500 mm (see variant options)
Load Grade / Color Yellow (TF) / Blue (TL) / Red (TM) / Green (TH) / Brown (TB)
Spring Rate See variant options
Max. Deflection See variant options
Surface Treatment Protective coating (oxidation resistant)
End Type Closed and ground ends
Coil Direction Right-hand wound
Operating Temperature Up to approximately 120 °C (248 °F)

❓ Frequently Asked Questions

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

Measure the pocket bore diameter in your tooling — this is your OD. The ID must clear the guide pin or mandrel. For this range: OD 35 mm pairs with ID 17.5 mm, OD 40 mm with ID 20 mm, and OD 50 mm with ID 25 mm. Always confirm both dimensions against your tooling drawing before ordering.

What does the color code on the spring end indicate?

The color identifies the ISO 10243 load grade: Yellow (TF) = light load, Blue (TL) = medium load, Red (TM) = heavy load, Green (TH) = extra-heavy load, Brown (TB) = ultra-heavy load. Select the grade that matches the force requirement specified in your die design.

How strong are these springs — can they handle high-cycle stamping operations?

These springs are manufactured from chromium-silicon alloy steel to ISO 10243 standards, which are specifically designed for repetitive compression in die and press tooling. The rated cycle life depends on the deflection percentage used per stroke — operating at 20–30% of free length deflection per cycle significantly extends service life compared to running near maximum deflection.

Are these springs corrosion resistant for use in humid or coolant-exposed environments?

The springs include a protective surface treatment that resists oxidation under typical workshop conditions. For environments with continuous coolant exposure or high humidity, periodic inspection is recommended. If extended corrosion resistance is critical, consider additional protective measures such as light oiling during storage.

Can I use these springs as direct replacements for existing ISO die springs in my tooling?

Yes — provided the OD, ID, free length, and load grade match your existing spring specification. ISO 10243 standardizes these dimensions, so springs from this range are dimensionally interchangeable with other ISO-compliant die springs of the same size and color grade. Always verify the spring rate and maximum deflection against your tooling requirements.

How do I select the correct free length for my application?

The free length should be chosen so that the spring operates within 20–30% deflection per stroke for standard cycle life, or up to 40% for lower-cycle applications. Measure the available pocket depth and the required working stroke, then select a free length that keeps deflection within the recommended range. Use the variant selector above to browse available lengths for your chosen OD and load grade.

What is the difference between the Red (TM) and Green (TH) load grades?

Red (TM) is the heavy load grade, suitable for applications requiring substantial spring force with moderate deflection. Green (TH) is the extra-heavy load grade, providing even higher force output at the same deflection — used in high-force clamping, stripping, or ejection applications where space is limited and maximum force density is needed.

🛒 Select your Outer Diameter, Inner Diameter, and Length & Colour above, then add to cart.

You may also like

Recently viewed