35mm Long Compression Spring 8mm - 60mm Diameter,Pressure- coiled springs

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Sale price$4.62 USD
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In stock (500 units), ready to be shipped

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Description

35mm Compression Springs — Reliable Coil Force Across 8–60mm Diameters

When a project demands consistent return force in a compact axial footprint, finding the right compression spring becomes the bottleneck. Engineers, makers, and maintenance technicians who work with mechanical assemblies, jigs, fixtures, or automation equipment need springs that hold their rated load cycle after cycle without set or fatigue. These 35mm long compression springs are designed for exactly that workload, available in wire diameters from 1.4 mm to 4 mm and coil diameters from 8 mm to 60 mm (approximately 0.31 in to 2.36 in) to cover a wide range of force and deflection requirements.

Each spring is formed from round wire wound into a close-tolerance helical coil with squared and ground ends for flat, stable seating. The body length is 35 mm (approximately 1.38 in). Wire diameters span 1.4 mm, 1.5 mm, 1.6 mm, 1.8 mm, 2 mm, 2.2 mm, 2.5 mm, 3 mm, 3.5 mm, and 4 mm. Coil outer diameters range from 8 mm through 60 mm. Material options include spring steel, stainless steel, and nickel-plated spring steel, each suited to different environmental and load conditions.

Typical use cases include compression spring replacement in industrial machinery and conveyor systems, return-force elements in DIY robotics and 3D-printer extruder assemblies, and load-bearing inserts in custom jigs, clamps, and fixture plates where a specific spring rate is required for repeatable clamping force.

⚙️ Compatibility: Suitable for spring seats, guide rods, and bores sized to match the selected outer diameter. Verify inner diameter clearance against your guide rod before ordering. Stainless steel variants recommended for humid or mildly corrosive environments; nickel-plated variants offer additional surface protection for decorative or light-duty applications.

✅ Key Features of These 35mm Compression Springs

📐 Wide Size Matrix

Wire diameters 1.4–4 mm paired with outer diameters 8–60 mm give you precise control over spring rate and load capacity for your specific application.

🔩 Three Material Options

Spring steel for general-purpose use, stainless steel for corrosion-sensitive environments, and nickel-plated for added surface protection — select the grade that matches your operating conditions.

📏 Consistent Free Length

All variants share a 35 mm (≈1.38 in) free length, simplifying drop-in replacement and standardized fixture design across multiple spring sizes.

🔄 Squared & Ground Ends

Flat end coils ensure stable, perpendicular seating on spring pockets and guide rods, reducing lateral buckling and improving load linearity.

📦 Flexible Pack Quantities

Available in packs of 1, 2, 5, or 10 pieces depending on the variant — order exactly what your project requires without excess inventory.

🛠️ Broad Application Range

Suited for industrial machinery, robotics, 3D printers, jigs, fixtures, automotive components, and general mechanical assemblies requiring reliable axial return force.

📐 Technical Specifications — Compression Spring

Free Length 35 mm (≈1.38 in)
Wire Diameter Range 1.4 mm – 4 mm
Outer Diameter Range 8 mm – 60 mm (≈0.31 in – 2.36 in)
End Type Squared and ground (closed ends)
Winding Direction Right-hand (standard)
Material Options Spring steel / Stainless steel / Nickel-plated spring steel
Spring Rate See variant options
Max Load / Deflection See variant options
Surface Finish Natural (spring steel), Bright (stainless), Nickel plated
Pack Quantity 1 / 2 / 5 / 10 pcs (varies by variant)
Operating Temperature Spring steel: typically –40°C to +120°C; Stainless: up to +200°C

❓ Frequently Asked Questions

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

Measure the bore or spring pocket your spring will sit in and select an outer diameter (OD) that fits with a small clearance — typically 0.5–1 mm smaller than the bore. If your spring rides on a guide rod, ensure the inner diameter (ID = OD minus twice the wire diameter) is larger than the rod diameter by at least 0.5 mm to prevent binding.

What is the difference between spring steel and stainless steel variants?

Spring steel (high-carbon steel) offers excellent fatigue resistance and a higher spring rate per unit weight, making it ideal for general mechanical applications in dry or indoor environments. Stainless steel provides significantly better corrosion resistance and is recommended for humid, wet, or mildly chemical environments. Stainless variants typically have a slightly lower spring rate for the same wire diameter due to the material's lower modulus of rigidity.

What does the nickel-plated option offer compared to plain spring steel?

Nickel plating adds a protective surface layer over spring steel, improving resistance to light corrosion, oxidation, and surface wear. It also provides a cleaner aesthetic finish. Nickel-plated springs are a cost-effective middle ground between plain spring steel and full stainless steel for applications with occasional moisture exposure or decorative requirements.

How do I select the correct wire diameter for my load requirement?

Thicker wire diameters produce stiffer springs with higher spring rates and load capacities. For light-duty return or positioning applications, wire diameters of 1.4–1.8 mm are typically sufficient. For moderate loads in jigs or fixtures, 2–2.5 mm wire is common. Heavy-duty clamping or industrial applications generally call for 3–4 mm wire. If you have a specific load and deflection target, use a spring rate calculator with the OD, wire diameter, and free length to verify before ordering.

Can these springs be used outdoors or in wet environments?

Spring steel variants are not recommended for prolonged outdoor or wet exposure without additional protection, as they can rust. For outdoor or humid environments, select the stainless steel variants, which offer substantially better corrosion resistance. Nickel-plated variants provide moderate protection for occasional moisture but are not a substitute for stainless steel in continuously wet conditions.

How many pieces do I receive per order?

Pack quantity varies by variant and is clearly indicated in the "Material Selection & Qty" option — available in 1, 2, 5, or 10 pieces. Select the quantity that matches your project needs. For prototyping or single-unit repairs, the 1 or 2-piece options are ideal; for production runs or stocking, the 5 or 10-piece packs offer better value per unit.

Are these springs compatible with 3D printer extruder or bed-leveling assemblies?

Yes. Compression springs in the 8–16 mm OD range with 1.4–2 mm wire diameter are commonly used in 3D printer extruder tensioners and bed-leveling spring mounts. Verify the OD, ID, and free length against your printer's spring specification before ordering. The 35 mm free length is a standard size used in many FDM printer designs.

What should I check before purchasing to ensure the spring fits my application?

Confirm four key parameters: (1) Free length — 35 mm for all variants here; (2) Outer diameter — must fit within your bore or housing with clearance; (3) Wire diameter — determines spring rate and load capacity; (4) Material — match to your environmental conditions. If you have a specific spring rate or load requirement, contact us with your application details and we can help identify the best variant.

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

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