1mm Wire Dia Compression Spring 11-18mm Dia 10-305mm Length A2 Stainless Steel

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1mm Wire Dia Compression Spring 11-18mm Dia 10-305mm Length A2 Stainless Steel

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Wire Dia x Outer Dia x Length: 1x11x10mm

Pack Size(Pcs): 10

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$11.53 USD

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In stock (500 units), ready to be shipped

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1mm Wire Dia Compression Spring — A2 Stainless Steel, 11–18mm OD, 10–305mm Length

Finding a compression spring that holds its load cycle after cycle — without corroding in damp or chemically active environments — is a recurring challenge for engineers, makers, and maintenance technicians. These 1mm wire diameter compression springs are manufactured from A2 (304) stainless steel, delivering reliable elastic return force for robotics, automation fixtures, electronic enclosures, medical devices, and general mechanical assemblies.

Each spring is formed from 1mm round wire, with outer diameters ranging from 11mm to 18mm (approximately 0.43 in to 0.71 in) and free lengths spanning 10mm to 305mm (approximately 0.39 in to 12.0 in). The A2 stainless steel alloy provides a balance of tensile strength and corrosion resistance suitable for indoor and light outdoor applications.

Typical use cases include return-force mechanisms in jigs and fixtures, plunger assemblies in pneumatic and hydraulic tooling, vibration isolation mounts in electronics enclosures, and tension-balancing components in small-batch robotics and automation builds. Available in pack sizes of 1, 5, 10, 20, and 50 pieces to suit prototyping through production runs.

⚙️ Compatibility: Suitable for shafts and bores sized to match the selected outer diameter. Verify inner diameter clearance and free length against your assembly before ordering. Consult variant options for exact dimensions.

✅ Key Features of These 1mm Wire Compression Springs

🔩A2 Stainless Steel Construction — Formed from 304-grade stainless wire for corrosion resistance in humid, mildly acidic, and salt-spray environments where carbon steel springs would degrade.
📐Wide Size Matrix — Outer diameters from 11mm to 18mm and free lengths from 10mm to 305mm (0.39 in to 12.0 in) cover a broad range of mechanical design requirements in a single product family.
🔄Consistent Elastic Return — Close-wound or open-wound geometry (see variant options) maintains repeatable spring rate across compression cycles, critical for precision actuation and load-sensing applications.
📦Flexible Pack Quantities — Order 1, 5, 10, 20, or 50 pieces per variant to match prototyping, small-batch, or production-volume needs without overstocking.
🏭Robotics & Automation Ready — 1mm wire diameter is a common specification in lightweight actuator return mechanisms, sensor mounts, and gripper assemblies used in desktop robotics and CNC tooling.
🔍Traceable SKU System — Each variant carries a unique SKU encoding wire diameter, outer diameter, and length, simplifying BOM management and reorder workflows for engineering teams.

📐 Technical Specifications — Compression Spring

Wire Diameter	1mm (0.039 in)
Material	A2 Stainless Steel (304 grade)
Outer Diameter Range	11mm – 18mm (0.43 in – 0.71 in)
Free Length Range	10mm – 305mm (0.39 in – 12.0 in)
Spring Type	Compression (open coil)
End Type	See variant options
Spring Rate	See variant options
Surface Finish	Bright / natural stainless
Pack Size Options	1 / 5 / 10 / 20 / 50 pieces
Corrosion Resistance	Suitable for indoor and light outdoor use
Operating Temperature	Typically –20°C to +200°C (–4°F to +392°F)

❓ Frequently Asked Questions

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

Select an outer diameter (OD) that fits freely inside your bore or housing with a small clearance — typically 0.5mm to 1mm smaller than the bore ID. For the free length, choose a spring that is longer than your required compressed length so the spring remains under load at its working position. Use the variant selector to browse all available OD × length combinations in this 1mm wire diameter family.

What is A2 stainless steel and how does it compare to carbon steel springs?

A2 stainless steel (equivalent to AISI 304) contains approximately 18% chromium and 8% nickel, giving it good resistance to oxidation, moisture, and mild chemical exposure. Carbon steel springs offer higher tensile strength at lower cost but will rust without protective coating. For applications in humid environments, food-adjacent equipment, or where surface contamination is a concern, A2 stainless is the more durable choice.

Are these springs suitable for outdoor or marine environments?

A2 stainless steel provides good corrosion resistance for light outdoor and intermittently wet conditions. For continuous saltwater immersion or aggressive marine environments, A4 (316) stainless steel is generally recommended. These springs are well-suited for sheltered outdoor enclosures, garden equipment, and light-duty marine accessories where direct prolonged saltwater contact is avoided.

Can I use these springs in robotics and automation builds?

Yes. The 1mm wire diameter and 11–18mm OD range are commonly specified in lightweight return mechanisms, end-effector components, sensor mounts, and gripper assemblies for desktop and collaborative robotics. The stainless construction also suits cleanroom-adjacent automation where particulate contamination from rust is unacceptable. Select the OD and length that match your actuator stroke and preload requirements.

What pack size should I order for prototyping versus production?

For initial prototyping and design validation, the 1-piece or 5-piece packs allow you to test fit and spring rate without committing to large quantities. Once your design is confirmed, the 10, 20, or 50-piece packs offer a lower per-unit cost and reduce reorder frequency for small-batch or production runs. All pack sizes ship the same spring — only the quantity differs.

How do I read the variant naming format (e.g., 1x11x10mm)?

The variant name follows the format Wire Diameter × Outer Diameter × Free Length, all in millimeters. For example, 1x11x10mm means: 1mm wire diameter, 11mm outer diameter, 10mm free length. This encoding is consistent across all variants in this product family, making it straightforward to cross-reference with your BOM or engineering drawing.

What is the inner diameter (ID) of these springs?

The inner diameter is approximately equal to the outer diameter minus twice the wire diameter. For example, a 1x11x_mm spring has an approximate ID of 11mm − 2×1mm = 9mm. Actual ID may vary slightly due to manufacturing tolerances. If your application requires a precise ID for shaft guidance, please contact us to confirm before ordering.

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