10pcs Compression Spring Wire Diameter 0.7-0.8mm & Length 5-50mm Pressure Small

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10pcs Compression Spring Wire Diameter 0.7-0.8mm & Length 5-50mm Pressure Small

HomeDIYer

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By HomeDIYer®

Wire Diameter: 0.7mm

Outside diameter: 5

Length: 5

Price:

$2.98 USD

Stock:

In stock (500 units), ready to be shipped

Quantity:

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Compression Spring — Precision Small Pressure Springs for DIY and Mechanical Assemblies

When a loose fit, inconsistent return force, or undersized spring causes your mechanism to fail mid-cycle, the root cause is almost always a mismatched spring spec. Engineers, hobbyists, and small-batch manufacturers who need reliable, repeatable compression force in tight spaces rely on precisely dimensioned small compression springs to keep their builds running smoothly.

Each pack contains 10 compression springs made from carbon steel wire. Wire diameter ranges from 0.7 mm to 0.8 mm (approximately 0.028–0.031 in), with outside diameters spanning 5–14 mm (approximately 0.20–0.55 in) and free lengths from 5 mm to 50 mm (approximately 0.20–1.97 in). Springs feature a closed-end, ground or plain finish typical of this wire gauge range.

Typical use cases include spring-loaded button mechanisms in consumer electronics, return springs in 3D printer extruder assemblies, and preload springs in small robotics joints and servo linkages — all applications where a compact, consistent compression spring for precision mechanical design is essential.

⚙️ Compatibility: Suitable for spring seats, bores, and housings designed for outside diameters of 5–14 mm. Verify free length and spring rate against your application before ordering. Select your wire diameter and outside diameter variant above to confirm fit.

✅ Key Features of These Compression Springs

🔩 Wide Size Matrix

Wire diameters of 0.7 mm and 0.8 mm combined with outside diameters from 5 to 14 mm and free lengths from 5 to 50 mm give you a broad selection in a single listing.

⚡ Consistent Return Force

Uniform coil pitch and wire cross-section deliver repeatable compression and extension cycles, reducing variance in spring-loaded mechanisms.

🛡️ Carbon Steel Construction

Carbon steel wire provides the tensile strength needed for sustained cyclic loading in mechanical assemblies, tooling fixtures, and electronic devices.

📦 10-Piece Pack

Each order ships as a pack of 10 identical springs, giving you spares for prototyping, testing, and replacement without over-ordering.

🎯 Compact Form Factor

Small outside diameters (5–14 mm) and short-to-medium free lengths (5–50 mm) make these springs ideal for space-constrained enclosures, PCB assemblies, and miniature actuators.

🔄 Multi-Application Versatility

Used in 3D printers, robotics, consumer electronics, automotive trim clips, pen mechanisms, and DIY jigs — wherever a small, reliable pressure spring is required.

📐 Technical Specifications — Compression Spring

Spring Type	Compression (pressure) spring
Wire Diameter	0.7 mm / 0.8 mm (≈ 0.028–0.031 in)
Outside Diameter	5–14 mm (≈ 0.20–0.55 in)
Free Length	5–50 mm (≈ 0.20–1.97 in)
Material	Carbon steel
End Type	See variant options
Surface Finish	See variant options
Spring Rate	See variant options
Quantity per Pack	10 pieces
Coil Direction	Right-hand (typical for this wire gauge)

❓ Frequently Asked Questions

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

Measure the bore or housing inner diameter where the spring will seat. The spring's outside diameter should be 0.5–1.5 mm smaller than the bore to allow free movement without binding. For a shaft-guided spring, the spring's inner diameter should be at least 0.5 mm larger than the shaft. Use the Outside Diameter option above to select the closest match.

What is the difference between 0.7 mm and 0.8 mm wire diameter?

A thicker wire (0.8 mm) produces a stiffer spring with a higher spring rate, meaning it requires more force to compress by the same distance compared to a 0.7 mm wire spring of the same geometry. If you need a softer, more sensitive return force, choose 0.7 mm. For applications requiring more resistance or load-bearing capacity, choose 0.8 mm.

Are these springs corrosion-resistant?

These springs are made from carbon steel, which offers good mechanical strength but limited corrosion resistance in humid or wet environments. For indoor, dry, or controlled environments they perform reliably. If your application involves moisture, chemicals, or outdoor exposure, consider applying a light coat of oil or using stainless steel springs instead.

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

Yes. The 5–14 mm outside diameter range and 5–50 mm free length range make these springs well-suited for 3D printer extruder return mechanisms, bed leveling spring mounts, and small robotic joint preload applications. Match the free length and outside diameter to your specific mount geometry before ordering.

How do I determine the correct free length to order?

Free length is the uncompressed length of the spring. Measure the available travel distance in your assembly and add your desired preload compression. For example, if your mechanism has 10 mm of travel and you want 5 mm of preload, you need a spring with a free length of at least 15 mm. Use the Length option above to select the appropriate size.

Are these sold individually or as a pack?

Each order includes 10 pieces of the same spring specification (same wire diameter, outside diameter, and free length). This is ideal for prototyping, where you need spares, or for small-batch production runs requiring consistent parts.

What industries or applications are these compression springs used in?

These small compression springs are commonly used in consumer electronics (button return mechanisms, battery contacts), robotics and automation (joint preload, sensor mounts), 3D printing (extruder and bed leveling), automotive trim and clip assemblies, pen and writing instrument mechanisms, and general DIY mechanical jigs and fixtures.

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