Heavy Load Duty Compression Spring OD 14-18mm Length 20-100mm Die Mould Spring

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Heavy Load Duty Compression Spring OD 14-18mm Length 20-100mm Die Mould Spring

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By HomeDIYer®

Size (OD*ID*Length): M14x7x20

Colors: Green

Packaging Quantity: 1 Pcs

Price:

$7.37 USD

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In stock (500 units), ready to be shipped

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Heavy Load Duty Compression Spring — Reliable Force for Die Mould & Industrial Applications

When your stamping die, injection mould, or automated fixture demands consistent, repeatable spring force, an undersized or worn-out spring becomes a costly bottleneck. Engineers, toolmakers, and DIY fabricators who need a dependable heavy-load compression spring in metric sizing will find this series purpose-built for demanding cycles.

Each spring is manufactured from high-carbon spring steel wire, surface-treated with a color-coded finish (Green, Brown, Yellow, Blue, or Red) that indicates load class at a glance. Outer diameter (OD) ranges from 14 mm to 18 mm (approx. 0.55 in – 0.71 in), inner diameter (ID) from 7 mm to 9 mm (approx. 0.28 in – 0.35 in), and free length from 20 mm to 100 mm (approx. 0.79 in – 3.94 in) across the available size options.

Typical use cases include die mould ejector systems requiring a heavy-load compression spring for consistent stroke, CNC fixture clamping mechanisms that need a metric die spring with tight OD tolerance, and robotics or automation assemblies where a color-coded compression spring simplifies maintenance identification.

⚙️ Compatibility: Designed for standard metric die spring pockets. Verify your pocket bore (ID clearance) and spring seat depth against the selected OD and free length before ordering.

✅ Key Features of These Heavy Load Duty Compression Springs

🔴 Color-Coded Load Classification

Green, Brown, Yellow, Blue, and Red finishes follow standard die spring color conventions, making load-class identification instant during assembly and maintenance.

📐 Wide Size Range in One Listing

OD 14 / 16 / 18 mm × ID 7 / 8 / 9 mm × lengths 20–100 mm — select the exact dimension your die pocket or fixture requires without sourcing from multiple suppliers.

🔩 High-Carbon Spring Steel Construction

Wound from high-carbon steel wire for the load capacity and fatigue resistance expected in repetitive stamping and moulding cycles.

🔄 Closed & Ground Ends

Flat, ground end coils provide stable seating in die pockets and spring guides, reducing lateral deflection under compression load.

🏭 Heavy-Load Duty Rating

Engineered for heavy-duty compression cycles — suitable for die mould ejection, stripper plates, and clamping applications where light or medium springs would fatigue prematurely.

📦 Single-Piece or Multi-Pack Options

Available in 1 Pcs packaging — order the exact quantity needed for prototyping, replacement, or small-batch tooling builds.

📐 Technical Specifications — Compression Spring

Product Type	Heavy Load Duty Compression Spring (Die Mould Spring)
Outer Diameter (OD)	14 mm / 16 mm / 18 mm (see variant options)
Inner Diameter (ID)	7 mm / 8 mm / 9 mm (see variant options)
Free Length	20 – 100 mm (see variant options)
Material	High-carbon spring steel
Surface Finish / Color	Green / Brown / Yellow / Blue / Red (load-class coded)
End Type	Closed and ground
Load Class	Heavy duty
Wire Diameter	See variant options
Spring Rate	See variant options
Packaging Quantity	1 Pcs
Application	Die mould, stamping, injection mould, fixture clamping, automation

❓ Frequently Asked Questions

How do I choose the correct OD and length for my die spring pocket?

Measure your die pocket bore diameter and depth. The spring OD should be 0.5–1 mm smaller than the pocket bore for a sliding fit. The free length should be long enough so the spring is pre-compressed at assembly (typically 10–15% of free length) and does not reach solid height at full stroke. Select from M14×7, M16×8, or M18×9 OD×ID combinations and match the free length (20–100 mm) to your stroke requirement.

What does the color coding on these compression springs indicate?

The surface color follows standard die spring load-class conventions: different colors correspond to different load ratings (light, medium, heavy, extra-heavy). These springs are rated as heavy-load duty. The color allows toolmakers to identify the correct spring at a glance during assembly, maintenance, or replacement without measuring.

Are these springs suitable for continuous high-cycle stamping operations?

Yes. The heavy-load duty rating and high-carbon spring steel construction are intended for repetitive compression cycles typical of stamping dies and injection mould ejector systems. For very high-cycle applications (millions of cycles), ensure the spring is not compressed beyond its rated deflection and replace springs as part of scheduled preventive maintenance.

What corrosion resistance do these springs offer?

The color-coded surface treatment provides a basic protective layer against light oxidation during storage and normal workshop use. For environments with exposure to coolants, cutting fluids, or high humidity, consider applying a light machine oil coating or storing springs in a dry environment. For highly corrosive environments, contact us to confirm suitability.

Can I use these springs as a direct replacement for standard ISO/JIS die springs?

These springs follow common metric die spring dimensional conventions (OD × ID × Length format). Verify the OD, ID, free length, and load class against your existing spring specification before ordering. If you have a part number from another supplier, contact us to confirm compatibility.

How do I decide between the M14, M16, and M18 OD sizes?

The OD size is primarily determined by your die pocket bore. A larger OD spring (M18) will generally provide a higher spring force at the same deflection compared to a smaller OD (M14) spring of the same length, due to the larger wire cross-section. Match the OD to your pocket bore first, then select the free length to achieve the required pre-load and working stroke.

Is 1 Pcs sufficient, or should I order multiple springs?

For most die and fixture applications, springs are used in matched sets. Order the quantity matching the number of spring pockets in your tool. It is also advisable to keep one or two spare springs on hand for quick replacement during production to minimize downtime.

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