Compression Spring Spring Steel Pressure Coil 1.5mm Wire OD 5-18mm 10-100mm Shop

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Compression Spring Spring Steel Pressure Coil 1.5mm Wire OD 5-18mm 10-100mm Shop

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By HomeDIYer®

Size: 1.5mm X 8mm X 10mm

Quantitys: 10 PCS

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$4.47 USD

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In stock (500 units), ready to be shipped

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Compression Spring Steel Coil — Precise Force Control for Every Mechanical Application

When a loose or mismatched spring causes your mechanism to bind, chatter, or fail under load, the root cause is almost always an incorrect wire diameter or free length. Engineers, robotics builders, and hands-on DIYers who need repeatable, consistent spring force rely on a well-specified compression spring rather than a generic substitute. These 1.5mm wire diameter compression springs are designed for applications where dimensional accuracy and consistent spring rate matter.

Each spring is manufactured from spring steel wire with a wire diameter of 1.5mm (0.059 in). Outer diameter options span 5–18mm (0.20–0.71 in), and free lengths range from 10–100mm (0.39–3.94 in). The coil body features a closed-end or open-end configuration depending on the selected variant; end style and pitch are consistent within each size group.

Typical use cases include compression spring replacements in 3D printer extruder assemblies, return springs in small pneumatic or mechanical actuators, preload springs in robotics joint mechanisms, and general-purpose coil spring applications in DIY jigs, fixtures, and tooling. Long-tail search terms such as "1.5mm wire compression spring metric," "small steel coil spring OD 10mm," and "compression spring 1.5mm 50mm length" describe exactly what this listing covers.

⚙️ Compatible with standard metric spring seats, spring pockets, and plunger assemblies designed for 1.5mm wire diameter coil springs. Verify OD and free length against your housing bore and travel requirement before ordering.

✅ Key Features of These Compression Spring Steel Coils

🔩 1.5mm Wire Diameter

Consistent 1.5mm (0.059 in) wire cross-section across all size variants ensures predictable spring rate and fatigue life in repetitive-cycle applications.

📐 Wide OD Range: 5–18mm

Outer diameter options from 5mm to 18mm (0.20–0.71 in) cover a broad range of spring pocket bores and plunger guide diameters.

📏 Free Length 10–100mm

Free lengths from 10mm to 100mm (0.39–3.94 in) allow selection of the correct travel and preload for your specific assembly.

🛡️ Spring Steel Construction

Spring steel wire provides the elastic modulus and yield strength needed for sustained cyclic loading without permanent set under normal operating conditions.

📦 10-Piece Pack

Each order ships as a 10-piece pack, giving you spares for prototyping, replacement, or multi-axis assemblies without over-ordering.

🔄 Metric Sizing for Direct Substitution

All dimensions follow metric standards, making these springs a direct drop-in for metric-spec mechanisms and simplifying BOM documentation for engineering projects.

📐 Technical Specifications — Compression Spring

Wire Diameter	1.5mm (0.059 in)
Outer Diameter (OD)	5–18mm (0.20–0.71 in) — See variant options
Free Length	10–100mm (0.39–3.94 in) — See variant options
Material	Spring Steel
Spring Type	Compression (coil)
End Style	See variant options
Surface Finish	See variant options
Pack Quantity	10 PCS per order
Dimensional Standard	Metric

❓ Frequently Asked Questions

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

Measure the bore or pocket that will house the spring to determine the maximum allowable OD, then subtract 0.5–1mm for clearance. For free length, add your required travel (compression distance) to the desired compressed length. Select the variant whose free length and OD fall within those bounds.

What is the spring rate of these compression springs?

Spring rate depends on wire diameter, OD, free length, and number of active coils. Because these springs span a wide range of OD and length combinations, the spring rate varies by variant. If you need a specific spring rate (N/mm or lbf/in), contact us with your OD and free length selection and we can provide the estimated rate for that variant.

Are these springs corrosion-resistant?

These springs are made from spring steel, which provides good mechanical properties but has limited inherent corrosion resistance compared to stainless steel. For outdoor, humid, or chemically exposed environments, consider applying a light coat of oil or grease, or contact us to inquire about stainless steel alternatives.

Can I use these springs in a 3D printer extruder or hotend assembly?

Yes. The 1.5mm wire diameter and compact OD options (8–12mm) are commonly used in extruder idler arm assemblies and hotend spring-loaded mounts. Select the OD that fits your idler pivot bore and a free length that provides the correct preload for your filament type.

What is the difference between OD and ID for these springs?

OD (outer diameter) is the overall outside measurement of the coil. Inner diameter (ID) equals OD minus twice the wire diameter. For a 1.5mm wire spring with 10mm OD, the ID is approximately 7mm (10mm − 2 × 1.5mm). Use ID when sizing a guide rod that passes through the center of the spring.

How many pieces come in each order, and can I order larger quantities?

Each order includes 10 pieces of the selected size. If you need larger quantities for production runs or bulk stocking, please contact us directly to discuss volume pricing and availability.

Will these springs take a permanent set if compressed fully?

Compressing any spring to its solid height (coil bind) repeatedly will cause permanent set over time. For best service life, design your assembly so the spring operates between 20% and 80% of its free length, avoiding solid-height contact during normal use.

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