Compression Spring 3mm Wire Diameter 35-40mm Dia 20-100mm Length Pressure Spring
Compression Spring 3mm Wire Diameter 35-40mm Dia 20-100mm Length Pressure Spring
Compression Spring 3mm Wire Diameter 35-40mm Dia 20-100mm Length Pressure Spring
Compression Spring 3mm Wire Diameter 35-40mm Dia 20-100mm Length Pressure Spring
Compression Spring 3mm Wire Diameter 35-40mm Dia 20-100mm Length Pressure Spring
Compression Spring 3mm Wire Diameter 35-40mm Dia 20-100mm Length Pressure Spring
Compression Spring 3mm Wire Diameter 35-40mm Dia 20-100mm Length Pressure Spring
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Compression Spring 3mm Wire Diameter 35-40mm Dia 20-100mm Length Pressure SpringCompression Spring 3mm Wire Diameter 35-40mm Dia 20-100mm Length Pressure SpringCompression Spring 3mm Wire Diameter 35-40mm Dia 20-100mm Length Pressure SpringCompression Spring 3mm Wire Diameter 35-40mm Dia 20-100mm Length Pressure SpringCompression Spring 3mm Wire Diameter 35-40mm Dia 20-100mm Length Pressure SpringCompression Spring 3mm Wire Diameter 35-40mm Dia 20-100mm Length Pressure SpringCompression Spring 3mm Wire Diameter 35-40mm Dia 20-100mm Length Pressure Spring

Compression Spring 3mm Wire Diameter 35-40mm Dia 20-100mm Length Pressure Spring

HomeDIYer
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By HomeDIYer®

Price:
$6.92 USD
Stock:
In stock (500 units), ready to be shipped

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Description

Compression Spring 3mm Wire — Reliable Pressure Spring for DIY and Industrial Use

When a worn-out spring causes a mechanism to fail mid-project, finding the right replacement fast matters. These compression springs are designed for makers, engineers, and workshop professionals who need consistent spring force across a wide range of applications — from light-duty DIY assemblies to repetitive industrial cycles.

Each spring is formed from 3mm wire diameter steel, with outer diameters ranging from 35mm to 40mm (approximately 1.38" to 1.57") and free lengths spanning 20mm to 100mm (approximately 0.79" to 3.94"). The coil body is finished with a smooth, uniform pitch for even load distribution across the full compression stroke.

Typical use cases include compression spring replacement in tool fixtures and jigs, return-force mechanisms in pneumatic and hydraulic assemblies, and load-bearing spring seats in custom fabrication projects requiring a 3mm wire compression spring with 35–40mm outer diameter.

⚙️ Compatibility: Suitable for spring seats, guide rods, and bores sized to accept 35–40mm OD springs. Verify free length and spring rate against your application before ordering.

✅ Key Features of These Compression Pressure Springs

🔩
  • 3mm Wire Diameter: Consistent wire gauge across all size variants for predictable spring rate and load capacity.
  • Wide Size Range: Outer diameters from 35mm to 40mm and free lengths from 20mm to 100mm cover a broad spectrum of replacement and custom-build needs.
  • Uniform Coil Pitch: Even spacing along the coil body ensures balanced load distribution and reduces side-load stress during compression.
  • Closed & Ground Ends: Flat end coils provide stable seating on spring pockets and guide rods, reducing tilt and lateral movement under load.
  • Bulk Pack Options: Available in packs of 2, 4, 6, 8, 10, 20, or 30 pieces — stock up for ongoing maintenance or production runs.
  • Versatile Application: Suited for tool fixtures, return mechanisms, valve assemblies, and custom fabrication projects requiring a reliable 3mm wire pressure spring.

📐 Technical Specifications — Compression Spring

Wire Diameter 3mm (0.118")
Outer Diameter 35mm – 40mm (1.38" – 1.57")
Free Length 20mm – 100mm (0.79" – 3.94")
Material Steel (spring steel alloy)
End Type Closed and ground
Coil Direction Right-hand
Surface Finish See variant options
Spring Rate See variant options
Max Load Capacity See variant options
Pack Size 2 / 4 / 6 / 8 / 10 / 20 / 30 pcs

❓ Frequently Asked Questions

How do I choose the right size compression spring for my application?

Match the outer diameter (OD) to your spring seat or bore ID, leaving a small clearance of typically 0.5–1mm. Select the free length based on the travel distance you need plus the compressed height. For this range, OD options are 35mm to 40mm and free lengths run 20mm to 100mm — use the variant selector to find your exact combination.

What load can a 3mm wire compression spring handle?

Load capacity depends on the specific OD and free length combination. Shorter springs with smaller OD typically have higher spring rates. For precise load data, contact us with your required deflection and load values and we can confirm the best variant for your use case.

Are these springs corrosion resistant?

These springs are made from spring steel alloy. For outdoor or high-humidity environments, consider applying a light coat of corrosion-inhibiting oil or grease. If you require stainless steel variants for corrosion-critical applications, please contact us to confirm availability.

What is the difference between the 35mm, 36mm, 38mm, and 40mm outer diameter options?

The outer diameter determines which spring seat or bore the spring fits into. A 35mm OD spring fits a bore of approximately 36–37mm; a 40mm OD spring fits a bore of approximately 41–42mm. Choose the OD that matches your housing or guide rod clearance. All variants share the same 3mm wire diameter.

Can I use these springs in a stacked or nested configuration?

Yes. Compression springs can be stacked in series (end-to-end) to increase total travel, or nested concentrically to increase load capacity. When nesting, ensure the inner spring OD is at least 1–2mm smaller than the outer spring ID to prevent coil binding during compression.

Which pack size should I order for a repair or production run?

For single repairs or prototyping, the 2-pack is the most economical starting point. For ongoing maintenance or small production runs, the 10- or 20-pack offers better per-unit value. The 30-pack is suited for high-volume assembly or stocking a workshop spare parts inventory.

What is the coil direction of these compression springs?

These springs are wound in a right-hand direction, which is the standard for most compression spring applications. If your application requires a left-hand wound spring (for example, when nesting two springs concentrically), please contact us to confirm availability.

🛒 Select your Wire Dia x Outer Dia x Length and Pack Size above, then add to cart.

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