TM Red Heavy Load Duty Compression Die Springs,Diameter 8-40mm Length 15mm-300mm
TM Red Heavy Load Duty Compression Die Springs,Diameter 8-40mm Length 15mm-300mm
TM Red Heavy Load Duty Compression Die Springs,Diameter 8-40mm Length 15mm-300mm
TM Red Heavy Load Duty Compression Die Springs,Diameter 8-40mm Length 15mm-300mm
TM Red Heavy Load Duty Compression Die Springs,Diameter 8-40mm Length 15mm-300mm
TM Red Heavy Load Duty Compression Die Springs,Diameter 8-40mm Length 15mm-300mm
TM Red Heavy Load Duty Compression Die Springs,Diameter 8-40mm Length 15mm-300mm
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TM Red Heavy Load Duty Compression Die Springs,Diameter 8-40mm Length 15mm-300mmTM Red Heavy Load Duty Compression Die Springs,Diameter 8-40mm Length 15mm-300mmTM Red Heavy Load Duty Compression Die Springs,Diameter 8-40mm Length 15mm-300mmTM Red Heavy Load Duty Compression Die Springs,Diameter 8-40mm Length 15mm-300mmTM Red Heavy Load Duty Compression Die Springs,Diameter 8-40mm Length 15mm-300mmTM Red Heavy Load Duty Compression Die Springs,Diameter 8-40mm Length 15mm-300mmTM Red Heavy Load Duty Compression Die Springs,Diameter 8-40mm Length 15mm-300mm

TM Red Heavy Load Duty Compression Die Springs,Diameter 8-40mm Length 15mm-300mm

HomeDIYer
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By HomeDIYer®

Price:
$2.22 USD
Stock:
In stock (500 units), ready to be shipped

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Description

TM Red Compression Die Springs — Heavy-Load Precision for Stamping & Tooling

When your stamping die, mold, or fixture demands consistent return force under repeated cycling, a weak or mismatched spring becomes the first point of failure. Engineers, toolmakers, and workshop operators who rely on precision motion control need a compression spring that holds its load rating across thousands of cycles without fatigue. The TM Red Heavy Load Duty Compression Die Springs are engineered for exactly that environment — delivering reliable, repeatable force in demanding industrial and DIY applications.

These die springs are manufactured from high-carbon chromium alloy steel wire, wound to tight dimensional tolerances. The distinctive red powder coating identifies the Heavy Load (TM/Red) rating class per ISO 10243 / JIS B 5012 standards. Available outer diameters range from 8 mm (0.31 in) to 50 mm (1.97 in), with inner diameters sized at approximately half the OD (e.g., 8×4 mm, 10×5 mm, up to 50×25 mm). Free lengths span 15 mm (0.59 in) to 350 mm (13.78 in), covering a wide range of stroke and travel requirements.

Typical use cases include punch-and-die stamping tooling where heavy return force is needed, injection mold ejector pin assemblies requiring consistent spring-back, and custom jig or fixture designs in metal fabrication shops. The standardized OD×ID×Length format makes these springs a direct drop-in replacement for worn or undersized springs in existing tooling setups.

⚙️ Compatibility: Fits standard die spring pockets sized to ISO 10243 / JIS B 5012 Heavy Load (Red) specifications. Verify your pocket OD, bore ID, and free length before ordering.

✅ Key Features of These TM Red Compression Die Springs

🔴
Heavy Load (Red) Rating

Classified as Heavy Load per ISO 10243 / JIS B 5012 — the red color coding confirms the load class at a glance, reducing setup errors in multi-spring tooling.

📐
Wide Size Range

OD from 8 mm to 50 mm, free lengths from 15 mm to 350 mm — a single listing covers the most common die spring pocket sizes used in stamping and molding tooling.

🔩
Alloy Steel Construction

Wound from high-carbon chromium alloy steel wire, providing higher load capacity and fatigue life compared to standard carbon steel springs of the same dimensions.

🛡️
Powder-Coated Surface

The red powder coat provides a degree of corrosion resistance during storage and handling, and serves as the standardized load-class identifier for quick visual inspection.

🔄
Consistent Return Force

Tight winding tolerances ensure uniform spring rate across the usable deflection range — critical for ejector pin timing and stripper plate return in progressive dies.

📦
Sold Individually (1 pc)

Each variant is sold as a single spring, letting you order exactly the quantity needed for your tooling layout without overstocking.

📐 Technical Specifications — Compression Die Springs

Spring Type Compression Die Spring
Load Class Heavy Load (Red / TM)
Standard ISO 10243 / JIS B 5012
Material High-carbon chromium alloy steel
Surface Finish Red powder coat
Outer Diameter (OD) 8 mm – 50 mm (0.31 in – 1.97 in)
Inner Diameter (ID) 4 mm – 25 mm (0.16 in – 0.98 in)
Free Length 15 mm – 350 mm (0.59 in – 13.78 in)
Spring Rate See variant options
Max. Deflection See variant options
Quantity per Order 1 pc

❓ Frequently Asked Questions

How do I choose the correct OD × ID × Length for my application?

Measure your die spring pocket: the pocket bore determines the maximum OD, and the guide pin diameter determines the minimum ID. The free length should be at least 1.5–2× your required working stroke. Select the variant whose OD fits your pocket and whose free length accommodates your stroke with adequate preload.

What does the red color indicate on these die springs?

Red identifies the Heavy Load class per ISO 10243 and JIS B 5012 color-coding standards. Heavy Load springs have a higher spring rate than Light (Yellow), Medium (Blue), or Extra Heavy (Green) springs of the same dimensions. Always match the load class to your tooling's force requirements.

Are these springs suitable for outdoor or wet environments?

The red powder coat provides basic corrosion resistance during storage and light-duty indoor use. For prolonged exposure to moisture, coolants, or corrosive media, consider applying additional lubrication or using stainless steel springs. These springs are primarily designed for tooling and die applications in controlled workshop environments.

Can I use these springs as a direct replacement for worn die springs in existing tooling?

Yes, provided the OD, ID, and free length match your existing spring pocket and guide pin dimensions, and the load class (Heavy/Red) matches the original specification. Always verify the spring rate and maximum deflection against your tooling design before replacing.

What is the difference between die springs and standard coil springs?

Die springs are wound from rectangular-section wire (rather than round wire), which allows more wire to be packed into the same envelope, resulting in higher load capacity and longer fatigue life for a given OD and free length. They are specifically designed for the high-cycle, high-load demands of stamping and molding tooling.

How many cycles can I expect from these springs?

Die springs rated to ISO 10243 Heavy Load class are typically designed for a minimum of 500,000 cycles at the rated deflection. Actual service life depends on operating deflection (keeping deflection below 30–40% of free length significantly extends life), lubrication, and operating temperature. Contact us to confirm cycle life data for your specific variant.

Do you offer bulk pricing for larger quantities?

Each listing is sold per piece (1 pc). To order multiple springs of the same or different sizes, simply adjust the quantity in your cart or add multiple variants. For large-volume orders, please contact us to discuss availability and pricing.

🛒 Select your OD × ID × Length above, then add to cart.

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