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Compression Springs Compression Springs

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Extension Springs Extension Springs

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Torsion Springs Torsion Springs

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Conical Springs Conical Springs

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What are torsion springs?

Torsion springs are coil springs designed to work by twisting (torsion) rather than compressing or extending. They store energy when twisted and exert a rotational force (torque) as they return to shape. Their ability to open/shut motions make them essential where linear springs won’t work. 

What torsion spring sizes and dimensions are available? 

Here at The Spring Store, we offer torsion springs in a huge range of sizes, from tiny micro springs to heavy-duty coils. For example, we manufacture precision torsion springs with wire diameters as small as 0.006″ up to 1.00″. Our stock catalog includes springs of various inner diameters and coil lengths to fit virtually any need. In practical terms, we carry springs for petite projects (think electronics clips or small latches) all the way up to large machinery applications. No matter what your design requires, we have stock torsion spring dimensions in our catalog or can custom-build exactly the size you need.

Where do different torsion spring sizes apply?

Torsion spring sizes range from tiny micro springs to large heavy-duty coils, and each size serves very different purposes:

Micro Torsion SpringMicro Torsion Spring

Micro torsion springs (0.079–0.150 Outer Diameter /0.012–0.015″ Wire Diameter): These are often found in small precision devices where only light torque is needed. Think of battery doors, eyeglass hinges, camera shutters, or medical tools. Their compact size makes them perfect for delicate, controlled movements.

Small Torsion SpringSmall Torsion Spring

Small torsion springs (0.151–0.350 Outer Diameter /0.016″–0.035″ Wire Diameter): These are very common in consumer products. For example, you’ll find them in clips, levers, mechanical toys, and small robotics projects. They provide more torque than micro springs while still fitting into tight assemblies.

Medium Torsion SpringMedium Torsion Spring

Medium torsion springs (0.351–0.900 Outer Diameter / 0.036″–0.090″ Wire Diameter): These start to handle more demanding jobs. You might see them in farm equipment, exercise machines, or industrial hardware that requires repeated twisting motion under heavier loads.

Large Torsion SpringLarge Torsion Spring

Large torsion springs (0.901–1.485 Outer Diameter / 0.091″–0.135″ Wire Diameter): These start to handle more demanding jobs. You might see them in farm equipment, exercise machines, or industrial hardware that requires repeated twisting motion under heavier loads.

How do you measure a torsion spring?

Measuring a torsion spring correctly is the first step to finding a replacement or designing a new one. Start by measuring the wire diameter (thickness of the coil) with a caliper or micrometer. Next, measure the outer diameter of the coil and the inner diameter if you need to fit it over a shaft. Count the number of coils in the body of the spring, making sure to include any partial turns. Then, measure the leg lengths—the straight sections that extend from the coil. Finally, note the winding direction (left-hand or right-hand coil), since this determines how the spring works when installed. Having these torsion spring dimensions written down makes it much easier to search our torsion spring catalog or use the torsion spring calculator to design a custom one.

How To Measure Coil Torsion SpringsHow To Measure Coil Torsion Springs

What materials and coatings can I choose from? 

The Spring Store offers torsion springs in many spring-steel materials and finishes. The most common wire types are Music Wire (ASTM A228) and Stainless Steel 302 (ASTM A313) for good strength and corrosion resistance. We also stock springs made of specialty alloys (e.g. chrome-silicon) and other steels like Oil Tempered (ASTM A229) or Hard Drawn (ASTM A227) spring wire. Some applications may even use copper alloys like Phosphor Bronze (ASTM B159) for better conductivity or appearance. For environments where corrosion is a concern, many springs are available with protective coatings – for example, zinc plating or black-oxide finish can be applied to the coils.

Stainless Steel 302 (ASTM A313)Stainless Steel 302 (ASTM A313)
Music Wire (ASTM A228)Music Wire (ASTM A228)
Phosphor Bronze (ASTM B159)Phosphor Bronze (ASTM B159)

Why trust The Spring Store for torsion springs? 

As a division of Acxess Spring, an ISO-certified spring manufacturer with 40+ years’ experience, we pride ourselves on expertise and customer service. We are one of the leading torsion spring manufacturers in Southern California (and worldwide), offering high-quality parts and fast service. Our engineers will personally review your design to ensure the best performance and cost, a simple change of wire or leg angle can save you money without losing strength. Whether you need to buy torsion springs off-the-shelf or create a new custom design, you get top-notch quality, rapid delivery, and expert support from The Spring Store. Reach out any time with your questions – our spring specialists are ready to help guide beginners through the process.

 

What to Remember About Torsion Spring Sizes?

Torsion springs might look simple, but choosing the right size, material, and design can make all the difference in how your project performs. Whether you’re a student experimenting with small mechanisms, an engineer designing a hinge or latch, or a buyer looking for reliable replacements, The Spring Store has the tools and expertise to guide you. From our wide torsion spring catalog to powerful design tools like Spring Creator and Instant Spring Quote, everything is built to make your search faster, easier, and more accurate.

  • We stock https://www.thespringstore.com/torsion-spring-stock-catalog.html – from micro springs to heavy-duty coils – covering wire diameters from about 0.006″ up to 1.00″.

  • Multiple materials (music wire, stainless, oil-tempered, etc.) and finishes (zinc plating, black oxide, etc.) are available, so you can match strength and corrosion resistance to your needs.

  • Our Spring Finder and online catalog let you search thousands of stock torsion springs by dimensions, showing you the part numbers, sizes, and prices that match your criteria.

  • For custom designs, Spring Creator guides you through all dimensions and automatically generates detailed calculations, blueprints, and even 3D CAD files.

  • Instant Spring Quote delivers immediate pricing and lead-time estimates for one or more spring designs, so you know the cost before you order.

Contact our spring experts today to discuss your project or request a custom torsion spring quote – we’re here to help every step of the way.

Invest in precision and quality

Spring Creator 5.0 offers you the possibility to design springs that perfectly fit your needs. Our platform not only allows you to design various types of springs but also provides advanced tools like the Online Spring Force Tester to simulate and evaluate spring performance. Visualize your design in 3D, download detailed blueprints, and get instant quotes. Try it for free and discover why we are the preferred choice of engineers and makers!

Spring Creator tool - Try it now

Created by Alfonso Jaramillo Jr

President Acxess Spring

Over 40 Years of Experience in Spring Engineering and Manufacturing