Compression Spring Wire Dia 1.4mm OD 8mm 9mm Spring Steel Pressure Coil Springs

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Compression Spring Wire Dia 1.4mm OD 8mm 9mm Spring Steel Pressure Coil Springs

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Wire Diameter x Outer Diameter: 1.4mm x 8mm

Length: 10mm

Packing QTY (Piece): 10 PCS

Price:

$9.93 USD

Stock:

In stock (500 units), ready to be shipped

Quantity:

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Compression Spring 1.4mm Wire Diameter — Reliable Coil Springs for DIY Mechanisms

When a loose-fitting assembly rattles, a valve fails to return, or a trigger mechanism loses its snap, the culprit is almost always an undersized or worn-out compression spring. These 1.4mm wire diameter compression springs are engineered for makers, hobbyists, and small-workshop builders who need consistent return force in compact spaces without sourcing industrial minimum-order quantities.

Each spring is wound from spring steel wire with a wire diameter of 1.4mm (0.055 in) and an outer diameter of either 8mm (0.315 in) or 9mm (0.354 in). Available lengths range from 10mm to 50mm (approximately 0.39 in to 1.97 in), giving you the flexibility to match the exact free-length your design requires. Ends are closed and ground for stable seating on flat surfaces.

Typical applications include DIY push-button mechanisms, pen and stylus assemblies, small valve and plunger returns, 3D-printer extruder tensioners, and RC model suspension components — all scenarios where a compact compression spring with predictable spring steel performance is essential.

🔧 Compatibility: Suitable for any application requiring a compression spring with 1.4mm wire diameter and OD 8mm or 9mm. Verify bore/housing inner diameter and required free length before ordering.

✅ Key Features of These Compression Coil Springs

🌀Spring Steel Construction — Wound from carbon spring steel wire for consistent elastic return and resistance to permanent set under repeated cycling.
📏Dual OD Options — Choose OD 8mm or OD 9mm (wire dia 1.4mm) to fit different bore sizes without modification.
📐Wide Length Range — Nine length options from 10mm to 50mm let you dial in the exact free length and spring rate your assembly needs.
⚙️Closed & Ground Ends — Flat, ground end coils seat squarely on mounting surfaces, reducing lateral deflection and improving load alignment.
📦Flexible Pack Quantities — Available in 10, 20, 50, or 100-piece packs so you can stock exactly what your project or workshop demands.
🔩Compact DIY-Friendly Size — The 1.4mm wire / 8–9mm OD profile fits standard small-bore housings used in pens, valves, latches, and electronic enclosures.

📐 Technical Specifications — Compression Coil Springs

Wire Diameter	1.4mm (0.055 in)
Outer Diameter (OD)	8mm (0.315 in) or 9mm (0.354 in) — See variant options
Free Length	10mm – 50mm (0.39 in – 1.97 in) — See variant options
Material	Carbon Spring Steel
End Type	Closed & Ground
Finish	See variant options
Spring Rate	See variant options
Pack Quantity	10 / 20 / 50 / 100 PCS — See variant options

❓ Frequently Asked Questions

How do I choose between the 8mm and 9mm outer diameter?

Measure the inner diameter of the bore or housing where the spring will sit. For a smooth sliding fit, select an OD approximately 0.5–1mm smaller than the bore ID. If the spring rides on a post, the post OD should be roughly 0.5–1mm smaller than the spring's inner diameter (ID = OD − 2 × wire diameter, so ID ≈ 5.2mm for OD 8mm and ≈ 6.2mm for OD 9mm).

What free length should I order for my application?

The free length is the uncompressed length of the spring. You typically want a free length 20–40% longer than your required compressed (working) length to ensure adequate spring force without fully coil-binding the spring. Measure your available cavity depth and working stroke, then select the closest available length from 10mm to 50mm.

Are these springs strong enough for repeated cycling?

Yes. Carbon spring steel maintains its elastic properties through many thousands of compression cycles when operated within its elastic range (i.e., not compressed to solid height). Avoid compressing the spring to coil-bind (solid height) repeatedly, as this causes permanent set and reduces spring force over time.

Are these springs corrosion-resistant for outdoor or humid environments?

Carbon spring steel has moderate corrosion resistance. For outdoor, marine, or high-humidity environments, consider applying a light coat of oil or grease, or contact us to confirm whether a coated or stainless-steel variant is available for your size requirement.

Can I use these springs in 3D printers or RC models?

Absolutely. The 1.4mm wire / 8–9mm OD size is commonly used in 3D-printer extruder tensioners, bed-leveling assemblies, and RC model suspension or steering return mechanisms. Verify the required free length and spring rate against your printer or model's specifications before ordering.

How many springs do I need to order, and which pack size is right for me?

For a single prototype or repair, the 10-piece pack is ideal. Workshop builders or makers running small production runs typically choose the 50- or 100-piece pack for a lower per-unit cost and a ready supply of spares. The 20-piece pack suits small batch projects or when you need a backup set.

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

The inner diameter is calculated as OD minus twice the wire diameter. For OD 8mm: ID ≈ 8 − (2 × 1.4) = 5.2mm (0.205 in). For OD 9mm: ID ≈ 9 − (2 × 1.4) = 6.2mm (0.244 in). These values are nominal; actual ID may vary slightly due to manufacturing tolerances.

🛒 Select your Wire Diameter × OD, Length, and Packing QTY above, then add to cart.

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These o rings are a great for my ear tunnels

These o rings are a great for my ear tunnels, always loosing one here and there, I always have a new ones in the drawer. Being silicone, don't have any reactions compared to standard rubber ones I purchased at hardware stores, plus much less expensive. Purchased 16mm I'd to use on 19mm tunnels, and stay on great, might be able to get away with 17mm rings, but really happy with my choice.

Will never order from these folks again

I waited a long time and that’s all I received was the eyebolt with no threaded rod attached to it

Perfect they are really made well and I used them for my car

Perfect they are really made well and I used them for my car. The only thing I had a great for us. It took three weeks to get here. So shipping was slow.

did not include wing nuts

Hi Scott, thank you for your feedback. We're sorry for any inconvenience caused. Please get in touch with us directly, and we'll assist you. Thanks for shopping with HomeDIYer!

Haven't received the order yet! It's been over

Haven't received the order yet! It's been over 19 days!

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Compression Spring Wire Dia 1.4mm OD 8mm 9mm Spring Steel Pressure Coil Springs

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DIY Expert Support

Description

Compression Spring 1.4mm Wire Diameter — Reliable Coil Springs for DIY Mechanisms

✅ Key Features of These Compression Coil Springs

📐 Technical Specifications — Compression Coil Springs

❓ Frequently Asked Questions

Compression Spring Wire Dia 1.4mm OD 8mm 9mm Spring Steel Pressure Coil Springs

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