Compression Spring Various Size 3-12mm Diameter & 5-120mm Length Pressure Small

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Compression Spring Various Size 3-12mm Diameter & 5-120mm Length Pressure Small

Name: Compression Spring Various Size 3-12mm Diameter & 5-120mm Length Pressure Small
Brand: HomeDIYer
Price: 7.52 USD
Availability: InStock

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By HomeDIYer®

Size:: 0.5 x 3mm (ID:2)

Any length: 5mm

Packaging (pcs): 10

Price:

$7.52 USD

Stock:

In stock (500 units), ready to be shipped

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Compression Springs 3–12mm OD — Reliable Elastic Force for Precision Mechanical Applications

When a project demands consistent return force in a compact space, finding the right compression spring can be frustrating — wrong wire diameter, wrong free length, or springs that lose tension after a few cycles. Engineers, robotics builders, and hands-on DIYers who need repeatable, spec-accurate springs in small quantities will find exactly what they need here.

These compression springs feature a uniform wire diameter of 0.5mm and are available in outer diameters (OD) ranging from 3mm to 12mm (approximately 0.12 in to 0.47 in) and free lengths from 5mm to 120mm (approximately 0.20 in to 4.72 in). Each spring is wound from steel wire with a consistent coil pitch, offering a stable spring rate across the full compression range. Packaged in sets of 5 or 10 pieces depending on the selected variant.

Typical use cases include small compression spring for robotics actuators and sensor mounts, miniature return spring for DIY mechanical keyboards and button assemblies, and precision coil spring for 3D printer extruder tensioners and filament guides.

⚙️ Compatibility: Suitable for spring-loaded mechanisms, jigs, fixtures, and assemblies requiring OD 3–12mm and free length 5–120mm. Verify bore and seat dimensions before ordering.

✅ Key Features of These Compression Springs

📐Wide Size Matrix
Wire diameter 0.5mm with OD options from 3mm to 12mm and lengths from 5mm to 120mm — one listing covers a broad range of miniature spring needs.

🔩Consistent Coil Geometry
Uniform pitch and closed ends provide stable seating and predictable spring rate, reducing variability in repeated-use assemblies.

⚡Compact Wire Diameter
0.5mm wire diameter enables use in tight-clearance bores and lightweight mechanisms where larger wire would add unwanted mass or stiffness.

📦Flexible Pack Quantities
Available in packs of 5 or 10 pieces — order the quantity that matches your prototype run or small-batch production without overstocking.

🔄Broad Application Fit
Suited for robotics, automation, DIY electronics, 3D printing, model engineering, and general mechanical assemblies requiring small-format springs.

🛡️Steel Construction
Wound from steel wire for durability under cyclic loading; maintains coil shape and return force across repeated compression cycles in typical indoor applications.

📐 Technical Specifications — Compression Springs

Wire Diameter	0.5mm (0.020 in)
Outer Diameter (OD)	3mm – 12mm (0.12 in – 0.47 in)
Free Length	5mm – 120mm (0.20 in – 4.72 in)
Spring Type	Compression (closed ends)
Material	Steel wire
Coil Direction	See variant options
Spring Rate	See variant options
Surface Finish	See variant options
Packaging	5 pcs or 10 pcs (select above)

❓ Frequently Asked Questions

How do I choose the right outer diameter for my application?

Measure the bore or housing inner diameter where the spring will sit. The spring OD should be slightly smaller than the bore to allow free movement without binding. For a shaft-guided spring, the spring ID (OD minus twice the wire diameter) should be slightly larger than the shaft. Use the Size option above to select the OD that fits your assembly.

What free length should I select?

Free length is the uncompressed length of the spring. Select a free length longer than your required working stroke plus the compressed (solid) height. As a conservative estimate, solid height ≈ wire diameter × number of coils. If you are unsure, choose a longer spring and trim your seat depth accordingly.

How strong are these springs — what load can they handle?

With a 0.5mm wire diameter, these are light-duty miniature springs suited for low-force applications such as button returns, sensor preloads, and small actuator biasing — typically in the range of a few grams to a few hundred grams of force depending on OD and free length. They are not intended for heavy structural or high-cycle industrial loads.

Are these springs corrosion-resistant for outdoor or humid environments?

These springs are made from steel wire and are suitable for typical indoor and dry environments. For applications exposed to moisture, humidity, or corrosive media, consider applying a light coating of oil or grease, or contact us to confirm material suitability for your specific environment.

Can I use these springs in 3D printers, robotics, or electronics projects?

Yes. The compact wire diameter and wide OD/length matrix make these springs well-suited for 3D printer extruder tensioners, filament path guides, robotic gripper return mechanisms, PCB button assemblies, and similar low-force precision applications. Select the size combination that matches your design clearances.

What is the difference between the 5-piece and 10-piece packaging options?

Both packaging options contain identical springs — the only difference is quantity. The 10-piece pack is available for shorter lengths (5mm–50mm) and offers a lower per-unit cost for prototyping or small-batch builds. The 5-piece pack covers longer lengths (55mm–120mm). Select the Packaging (pcs) option above to choose your preferred quantity.

How do I confirm the spring will fit before I order?

Check three dimensions: (1) OD vs. bore inner diameter — OD should be smaller; (2) ID vs. guide shaft diameter — ID should be larger; (3) free length vs. available cavity depth. If you need assistance confirming fit for a specific assembly, contact us with your bore, shaft, and stroke dimensions.

🛒 Select your Size (OD), Length, and Packaging quantity above, then add to cart.

Compression Spring Various Size 3-12mm Diameter & 5-120mm Length Pressure Small

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Description

Compression Springs 3–12mm OD — Reliable Elastic Force for Precision Mechanical Applications

✅ Key Features of These Compression Springs

📐 Technical Specifications — Compression Springs

❓ Frequently Asked Questions

Compression Spring Various Size 3-12mm Diameter & 5-120mm Length Pressure Small

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