100mm Long Compression Spring 12mm - 80mm Diameter，Pressure- coiled springs

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100mm Long Compression Spring 12mm - 80mm Diameter，Pressure- coiled springs

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By HomeDIYer®

Length(mm) & Wirediameter: 100 mm & 2 mm

Diameter: 12 mm

Material Selection & Qty (pcs): Stainless steel & 2pcs

Price:

$6.61 USD

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In stock (500 units), ready to be shipped

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100mm Compression Springs — Reliable Coiled Spring Force for DIY & Industrial Use

When a project demands consistent return force — whether you're building a custom jig, repairing a mechanical assembly, or prototyping a robotics actuator — finding a compression spring in exactly the right diameter and wire gauge is rarely straightforward. These 100mm long compression springs are designed for engineers, makers, and maintenance professionals who need a precise, ready-to-install coiled spring without custom fabrication lead times.

Each spring is 100 mm (3.94 in) in free length, with wire diameters ranging from 2 mm to 5 mm (0.079–0.197 in) and outer diameters spanning 12 mm to 80 mm (0.47–3.15 in). Available in stainless steel, spring steel, and nickel-plated steel, the range covers corrosion-sensitive, high-cycle, and decorative applications alike.

Typical use cases include compression spring replacement in industrial machinery, return-force elements in 3D printer Z-axis assemblies, suspension buffers in lightweight robotics platforms, and load-bearing inserts in custom tool fixtures requiring repeatable spring-back force.

⚙️ Compatibility: Suitable for standard spring seats and guide rods matching the selected outer diameter. Verify inner diameter clearance against your guide rod OD before ordering. See variant options for exact dimensions.

✅ Key Features of These 100mm Compression Springs

📐 Wide Size Matrix

Outer diameters from 12 mm to 80 mm (0.47–3.15 in) paired with wire diameters from 2 mm to 5 mm — one listing covers dozens of application-specific combinations.

🔩 Three Material Options

Choose stainless steel for corrosion resistance, spring steel for high-cycle fatigue strength, or nickel-plated steel for a clean finish in visible assemblies.

📏 Consistent 100 mm Free Length

All variants share a 100 mm (3.94 in) free length, simplifying drop-in replacement and design standardization across multiple assemblies.

🔄 Closed & Ground Ends

Closed coil ends provide a flat seating surface for stable load transfer and reduced lateral deflection under compression.

📦 Flexible Pack Quantities

Available in 1, 2, 3, 4, or 5-piece packs — order exactly what your project requires without excess inventory.

🏭 Broad Application Range

Suited for DIY fabrication, light industrial machinery, robotics, 3D printer frames, automotive jigs, and general mechanical assemblies requiring reliable return force.

📐 Technical Specifications — Compression Springs

Free Length	100 mm (3.94 in)
Outer Diameter Range	12 mm – 80 mm (0.47 – 3.15 in)
Wire Diameter Range	2 mm – 5 mm (0.079 – 0.197 in)
Material Options	Stainless Steel / Spring Steel / Nickel Plated Steel
End Type	Closed coil ends
Spring Rate	See variant options
Load Capacity	See variant options
Surface Finish	Natural (stainless/spring steel) or Nickel Plated
Pack Quantity	1 / 2 / 3 / 4 / 5 pcs (see variant options)
Application	DIY, industrial machinery, robotics, 3D printers, tool fixtures

❓ Frequently Asked Questions

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

Measure the inner diameter of your spring housing or the outer diameter of your guide rod. The spring's outer diameter should be slightly smaller than the housing bore (typically 0.5–1 mm clearance) and larger than the guide rod OD to prevent binding. Select the closest matching variant from the Diameter option above.

What is the difference between spring steel and stainless steel for compression springs?

Spring steel (typically 65Mn or similar) offers higher tensile strength and is well-suited for high-cycle applications where fatigue resistance matters. Stainless steel provides superior corrosion resistance, making it the better choice for humid, wet, or chemically exposed environments. For most indoor mechanical assemblies, spring steel is sufficient; for outdoor or marine use, choose stainless.

Are these springs corrosion resistant?

Stainless steel variants offer good corrosion resistance suitable for damp or mildly corrosive environments. Nickel-plated variants provide a protective coating that resists light oxidation. Plain spring steel variants are best used in dry, indoor environments or with additional protective coating if moisture exposure is expected.

Can I use these springs in a 3D printer or robotics project?

Yes. The 100 mm free length and wide diameter range make these springs compatible with many 3D printer Z-axis bed leveling assemblies, extruder return mechanisms, and lightweight robotics actuators. Select the wire diameter and outer diameter that match your guide rod and housing dimensions for a secure fit.

What wire diameter should I select for heavier loads?

A larger wire diameter produces a stiffer spring with a higher spring rate and load capacity. For light-duty return-force applications, 2–2.5 mm wire is typically sufficient. For moderate industrial loads, 3–3.5 mm wire is recommended. For heavy-duty or high-load applications, select 4–5 mm wire diameter variants.

How many pieces do I need to order, and can I mix sizes?

Each variant is sold in a fixed pack quantity (1, 2, 3, 4, or 5 pcs) as shown in the Material Selection & Qty option. To mix sizes or materials, add each desired variant to your cart separately. This allows you to build a custom assortment tailored to your project requirements.

What is the free length, and does it change under load?

The free length is 100 mm — the spring's natural, unloaded length. Under compression, the spring shortens proportionally to the applied load and its spring rate. The compressed (solid) length depends on the number of coils and wire diameter; refer to the variant specifications or contact us for detailed load-deflection data on a specific size.

🛒 Select your Length & Wire Diameter, Diameter, and Material above, then add to cart.