Compression Spring 3mm Wire Diameter 22-29mm OD 20-100mm Length Pressure Spring

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Compression Spring 3mm Wire Diameter 22-29mm OD 20-100mm Length Pressure Spring

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Wire Dia x Outer Dia x Length: 3x22x20mm

Pack Size(Pcs): 1

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$9.15 USD

Stock:

In stock (500 units), ready to be shipped

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Compression Spring 3mm Wire Diameter — Reliable Elastic Force for Mechanical Applications

When a mechanical assembly demands consistent return force and fatigue resistance across thousands of cycles, selecting the right compression spring is critical. Engineers, robotics builders, and hands-on DIYers working on actuators, jigs, fixtures, and automated equipment need springs that hold their rated load without set or deformation over time.

These compression springs feature a 3mm wire diameter and are available in outer diameters ranging from 22mm to 29mm (approximately 0.87–1.14 in) and free lengths from 20mm to 100mm (approximately 0.79–3.94 in). The coil body is formed from carbon spring steel wire, delivering a balance of elasticity and tensile strength suited to moderate-to-heavy duty cyclic loading.

Typical use cases include compression spring for robotics end-effectors requiring precise return travel, pressure spring in industrial jig and fixture clamping systems, and coil spring replacements in small machinery, valve assemblies, and DIY automation rigs where exact OD and free length must be matched to bore and housing dimensions.

⚙️ Compatibility: Designed for standard spring housings and bores accepting 22–29mm OD coil springs. Verify your housing inner diameter and required free length before ordering. Wire diameter is fixed at 3mm across all variants.

✅ Key Features of These Compression Springs

🔩 3mm Wire Diameter

Consistent 3mm wire cross-section across all variants ensures predictable spring rate and load capacity for repeatable mechanical performance.

📏 Wide Size Matrix

Outer diameters from 22mm to 29mm and free lengths from 20mm to 100mm give you a broad selection to match your exact housing and travel requirements without custom fabrication.

🔄 Cyclic Fatigue Resistance

Carbon spring steel wire construction maintains elastic memory through repeated compression and release cycles, resisting permanent set under sustained loading.

⚖️ Flexible Pack Quantities

Available in packs of 1, 5, or 10 pieces — order a single unit for prototyping or a multi-pack for production runs and maintenance stock.

🎯 Precision-Wound Coils

Closed and ground ends (typical for this wire and OD range) provide flat seating surfaces for stable axial load transfer in spring seats and counterbores.

🛠️ Broad Application Fit

Suited for robotics, automation fixtures, valve mechanisms, DIY machinery, and general mechanical assemblies requiring a compact, moderate-load return spring.

📐 Technical Specifications — Compression Spring

Wire Diameter	3mm (0.118 in)
Outer Diameter (OD)	22mm – 29mm (0.87 – 1.14 in)
Free Length	20mm – 100mm (0.79 – 3.94 in)
Material	Carbon spring steel wire
End Type	See variant options
Spring Rate	See variant options
Surface Finish	See variant options
Coil Direction	Right-hand wound (typical)
Pack Size	1 / 5 / 10 pieces
Operating Temperature	See variant options

❓ Frequently Asked Questions

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

Measure your spring housing's inner diameter — the spring OD should be 0.5–1.5mm smaller than the bore for smooth travel without binding. For free length, select a spring whose free length is longer than your required compressed length plus the desired travel stroke. Use the variant selector to match Wire Dia × OD × Length to your assembly dimensions.

What load can a 3mm wire diameter compression spring handle?

Load capacity depends on OD, free length, and material. For 3mm wire carbon steel springs in the 22–29mm OD range, spring rates typically fall in the range of a few N/mm to tens of N/mm depending on the number of active coils. For precise load data for a specific variant, contact us to confirm.

Are these springs corrosion-resistant?

Carbon spring steel offers good mechanical properties but moderate corrosion resistance. For environments with moisture or mild chemicals, consider applying a light coating of machine oil after installation. For highly corrosive environments, contact us to confirm if a coated or stainless variant is available.

Will these springs fit standard metric spring housings?

Yes — the OD range of 22–29mm is designed to fit standard metric counterbores and spring seats. Verify your housing bore diameter and ensure the selected OD provides the recommended clearance (typically 0.5–1.5mm). The 3mm wire diameter is compatible with standard metric spring design guidelines.

Can I use these compression springs in robotics or automation equipment?

Yes. These springs are well-suited for robotics end-effectors, gripper return mechanisms, linear actuator preload, and automation fixture clamping. Select the free length and OD that match your travel and housing constraints. Order a single piece first to validate fit before purchasing a multi-pack.

What is the difference between ordering 1, 5, or 10 pieces?

The Pack Size option lets you choose the quantity per order. A single piece (1 pc) is ideal for prototyping and fit verification. Packs of 5 or 10 are cost-effective for production builds, maintenance kits, or when you need spares on hand. All packs contain identical springs of the selected Wire Dia × OD × Length variant.

How do I measure a compression spring to find a replacement?

Measure three dimensions: (1) wire diameter with calipers, (2) outer diameter across the coil body, and (3) free length when the spring is fully uncompressed. Match these to the variant options in the selector above. If your existing spring is slightly deformed, measure the wire diameter first as it is the most stable dimension.

🛒 Select your Wire Dia × Outer Dia × Length and Pack Size above, then add to cart.