Compression Spring 4-5mm Wire dia 40-80mm Diameter & 300mm Length Pressure Small

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Compression Spring 4-5mm Wire dia 40-80mm Diameter & 300mm Length Pressure Small

Name: Compression Spring 4-5mm Wire dia 40-80mm Diameter & 300mm Length Pressure Small
Brand: HomeDIYer
Price: 9.83 USD
Availability: InStock

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By HomeDIYer®

Wire diameter: 4mm

Outer diameter: 40mm

Length & Quantity (pcs): 300mm & 1

Price:

$9.83 USD

Stock:

In stock (500 units), ready to be shipped

Quantity:

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Compression Spring for DIY Automation — Reliable Elastic Force in Every Build

When a project demands consistent push-back force — whether you're building a custom jig, a return mechanism, or a spring-loaded fixture — finding a compression spring in exactly the right wire diameter and outer diameter can be the difference between a smooth prototype and a frustrating rebuild. Makers, hobbyists, and small workshop operators who work with mechanical assemblies know how critical it is to match spring geometry to load requirements without over-engineering the solution.

These compression springs are wound from carbon steel wire in three wire diameters — 4mm, 4.5mm, and 5mm — with outer diameters ranging from 25mm to 80mm (approximately 0.98 in to 3.15 in). Each spring is 300mm (11.8 in) in free length. Available in quantities of 1, 2, 5, or 10 pieces per order to suit both single-unit prototyping and small-batch production runs.

Typical use cases include compression spring for automation return mechanisms, spring-loaded clamp fixtures in woodworking or metalworking setups, and elastic-force elements in robotics and 3D-printer bed leveling systems. The wide outer-diameter range makes these compression springs suitable for both compact inline assemblies and larger-bore guide-rod applications.

⚙️ Compatible with standard guide rods and spring seats sized to match the selected outer diameter. Verify inner diameter clearance against your guide rod before ordering.

✅ Key Features of These Compression Springs

🔩Three Wire Diameters

Choose 4mm, 4.5mm, or 5mm wire to match your load and deflection requirements precisely.

📏Wide OD Range

Outer diameters from 25mm to 80mm cover a broad spectrum of guide-rod and bore sizes in one product family.

📐Fixed 300mm Free Length

All variants share a 300mm free length, simplifying design calculations and interchangeability across projects.

🔄Flexible Quantity Options

Order 1, 2, 5, or 10 pieces — ideal for prototyping single units or stocking small-batch production runs.

⚡Carbon Steel Construction

Wound from carbon steel wire for reliable elastic performance under repeated compression cycles in dry indoor environments.

🛠️Broad Application Fit

Suited for return mechanisms, spring-loaded fixtures, robotics, 3D-printer beds, and general DIY automation assemblies.

📐 Technical Specifications — Compression Spring

Wire Diameter	4mm / 4.5mm / 5mm (see variant options)
Outer Diameter (OD)	25mm – 80mm (see variant options)
Free Length	300mm (approx. 11.8 in)
Material	Carbon steel
Spring Type	Compression (open-end coil)
End Style	See variant options
Surface Finish	See variant options
Quantity per Order	1 / 2 / 5 / 10 pcs (see variant options)
Spring Rate	See variant options
Max Load Capacity	See variant options

❓ Frequently Asked Questions

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

Measure the inner bore or guide-rod diameter of your assembly. The spring's outer diameter should be slightly smaller than the bore (for guided applications) or match your design clearance. The inner diameter of the spring is approximately OD minus twice the wire diameter — use this to verify guide-rod fit.

What wire diameter should I select for my load requirements?

A larger wire diameter (e.g., 5mm) produces a stiffer spring with higher load capacity, while a smaller wire diameter (e.g., 4mm) yields a softer spring with lower force. If you have a target spring rate or load, compare it against the variant specifications or contact us to confirm before ordering.

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

These compression springs are wound from carbon steel, which is best suited for dry indoor environments. For outdoor, humid, or corrosive environments, consider applying a protective coating or selecting stainless steel springs. Contact us to confirm suitability for your specific conditions.

Can I cut or modify the spring to a shorter free length?

Carbon steel compression springs can be cut to a shorter length using an angle grinder or spring cutter, but the cut end will be open and may require grinding flat. Modifying the spring may affect its spring rate and load capacity. We recommend ordering the closest standard length to your requirement.

Are these springs compatible with 3D-printer bed leveling or robotics applications?

Yes. The range of outer diameters (25–80mm) and wire diameters (4–5mm) makes these springs suitable for a variety of DIY automation tasks including 3D-printer bed leveling, robotic return mechanisms, and spring-loaded fixtures. Verify the OD and free length against your design before ordering.

How do I decide between ordering 1, 2, 5, or 10 pieces?

Order 1 or 2 pieces for prototyping and fit-testing. Order 5 or 10 pieces if you are building multiple units, need spares, or want a lower per-unit cost. Bulk quantities are priced at a discount compared to single-piece orders.

What is the inner diameter of each spring variant?

The inner diameter (ID) is approximately equal to the outer diameter minus twice the wire diameter. For example, a 4mm wire / 40mm OD spring has an approximate ID of 32mm. Use this to check guide-rod clearance. Exact values may vary slightly due to manufacturing tolerances.

🛒 Select your wire diameter, outer diameter, and quantity above, then add to cart.

Compression Spring 4-5mm Wire dia 40-80mm Diameter & 300mm Length Pressure Small

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Description

Compression Spring for DIY Automation — Reliable Elastic Force in Every Build

✅ Key Features of These Compression Springs

📐 Technical Specifications — Compression Spring

❓ Frequently Asked Questions

Compression Spring 4-5mm Wire dia 40-80mm Diameter & 300mm Length Pressure Small

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