Compression Spring Spring Steel Pressure Coil 1.5mm Wire OD 5-18mm 5-100mm Heavy

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Sale price$6.92 USD
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In stock (500 units), ready to be shipped

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Description

Compression Spring 1.5mm Wire Steel Coil — Reliable Elastic Force for Demanding DIY Applications

When a mechanism fails because a spring loses tension too quickly or collapses under load, the root cause is almost always undersized wire or inconsistent coil geometry. Makers, workshop technicians, and mechanical hobbyists who need repeatable, predictable spring force will find these compression springs a dependable solution for projects where tolerances matter.

Each spring is wound from 1.5mm wire diameter spring steel, with outer diameters (OD) ranging from 5mm to 18mm (approximately 0.20 in to 0.71 in) and free lengths from 10mm to 100mm (approximately 0.39 in to 3.94 in). The coil pitch and number of active coils vary by size; exact counts are listed per variant. Springs are sold in sets of 10 pieces per order.

Typical use cases include compression spring replacement in mechanical assemblies, return-force mechanisms in jigs and fixtures, valve and plunger spring applications in pneumatic or hydraulic DIY builds, and load-bearing cushioning in custom enclosures or tool holders. The wide OD and length matrix makes it straightforward to match a replacement compression spring for small engine components or precision instrument housings.

⚙️ Compatibility: Suitable for standard spring seats and bores sized to match the selected OD. Verify bore clearance and seat recess depth against your chosen variant before ordering.

✅ Key Features of These Compression Springs

  • 🔩 1.5mm Wire Diameter — Consistent wire gauge across the full size range ensures uniform spring rate calculations and predictable deflection behavior under axial load.
  • 📐 Wide OD Range: 5mm–18mm — Eleven outer diameter steps (5 through 18mm) let you match the spring to your bore or seat without custom fabrication.
  • 📏 Free Length 10mm–100mm — Nine length options per OD group cover short-travel return springs through longer-stroke compression applications in a single product family.
  • 🛡️ Spring Steel Construction — Wound from spring steel with inherent elastic memory, these coils resist permanent set under repeated compression cycles typical of mechanical assemblies.
  • 📦 10-Piece Sets — Each variant ships as a pack of 10, giving you spares for prototyping, batch builds, or maintenance stock without over-ordering.
  • 🔄 Closed & Ground Ends (typically) — Compression springs in this wire/OD class are typically manufactured with closed ends to provide a flat bearing surface for consistent load transfer against spring seats and plunger faces.

📐 Technical Specifications — Compression Spring

Wire Diameter 1.5mm (0.059 in)
Outer Diameter (OD) 5mm – 18mm (0.20 in – 0.71 in); see variant options
Free Length 10mm – 100mm (0.39 in – 3.94 in); see variant options
Material Spring Steel
End Type Closed ends (typically)
Spring Rate See variant options
Number of Active Coils See variant options
Surface Finish See variant options
Quantity per Pack 10 PCS
Application General mechanical compression, return-force, valve, plunger, jig & fixture

❓ Frequently Asked Questions

How do I choose the right OD and length for my application?

Measure the bore or seat inner diameter your spring must fit inside — the spring OD should be slightly smaller than the bore to allow free movement. For free length, measure the available cavity depth and subtract your required compressed length to confirm the spring can deflect enough without going solid (coil-bound). Use the variant selector to match both dimensions before adding to cart.

What load capacity can I expect from a 1.5mm wire compression spring?

Load capacity depends on the OD, free length, and number of active coils — all of which vary by variant. As a general guide, 1.5mm wire springs in this OD range (5–18mm) are suited for light-to-medium duty applications such as instrument mechanisms, small valve returns, and tool-holder retention. For exact spring rate data, contact us with your selected variant dimensions.

Are these springs corrosion resistant?

These springs are made from spring steel, which offers good mechanical properties but moderate corrosion resistance in dry indoor environments. For applications exposed to moisture, chemicals, or outdoor conditions, consider applying a protective coating after installation, or contact us to confirm whether a coated or stainless variant is available for your size.

Will these springs work as direct replacements for OEM compression springs?

They can serve as replacements when the OEM spring matches the wire diameter (1.5mm), OD, and free length of a listed variant. Verify the end type (closed vs. open) and spring rate against your OEM specification. If the OEM spring rate is critical, request confirmation before ordering.

Can I use these springs in high-temperature environments?

Standard spring steel retains its elastic properties up to approximately 120–150°C (248–302°F) under continuous load. Intermittent exposure to slightly higher temperatures is typically tolerable, but sustained high-heat applications may cause stress relaxation and loss of spring rate over time. For elevated-temperature environments, contact us to confirm suitability.

How do I calculate whether the spring will go coil-bound before reaching my required travel?

Solid height (coil-bound length) is approximately equal to the total number of coils multiplied by the wire diameter (1.5mm). Subtract the solid height from the free length to get the maximum available travel. Ensure your required deflection is less than this value, with a safety margin of at least 15–20%, to avoid bottoming out the spring under load.

Are the springs sold individually or in packs?

Each variant is sold as a pack of 10 pieces (10 PCS). This gives you spares for prototyping, batch production, or maintenance without needing to reorder frequently. The quantity option is fixed at 10 PCS per order line.

🛒 Select your size (OD × Length) above, then add to cart.

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