Determining torsion spring size is crucial for ensuring the proper functionality and safety of various mechanisms, from garage doors to industrial equipment. This comprehensive guide, brought to you by CONDUCT.EDU.VN, provides a step-by-step approach to accurately measure and select the correct torsion springs, emphasizing precision and safety. With the right tools and knowledge, you can confidently determine the appropriate spring specifications for your specific application and ensure optimal performance. You’ll gain insight into spring dimension, spring rate calculation, and proper spring selection.
1. Understanding the Importance of Accurate Torsion Spring Measurement
Accurately measuring torsion springs is paramount for several reasons. Using the wrong size spring can lead to operational inefficiencies, potential safety hazards, and premature wear and tear of the spring itself or the mechanism it supports. Selecting the correct torsion spring, following the below guide, ensures optimal performance, longevity, and safety.
1.1 Ensuring Optimal Performance
When a torsion spring is correctly sized, it provides the precise amount of torque needed to balance the load and facilitate smooth operation. An undersized spring will struggle to lift the load, causing strain on the motor or lifting mechanism, while an oversized spring can create excessive force, leading to jerky movements and potential damage.
1.2 Maintaining Safety
Using the wrong size torsion spring can create a safety hazard, particularly in applications such as garage doors. If the spring is not strong enough to support the weight of the door, it can suddenly drop, posing a risk of injury or property damage. Conversely, an overly strong spring can cause the door to snap open with excessive force, also creating a dangerous situation.
1.3 Preventing Premature Wear and Tear
An improperly sized torsion spring can undergo excessive stress and fatigue, leading to premature failure. This can result in unexpected breakdowns, costly repairs, and potential downtime. Selecting the correct spring size ensures that it operates within its design parameters, maximizing its lifespan and reliability.
1.4 Minimizing Operational Inefficiencies
Using the wrong size spring can lead to operational inefficiencies, such as increased energy consumption, reduced speed, and decreased productivity. By selecting the correct spring size, you can optimize the performance of the mechanism it supports, minimizing energy waste and maximizing efficiency.
1.5 Avoiding Costly Repairs and Downtime
Investing in correctly sized torsion springs can save you money in the long run by preventing premature wear and tear, reducing the risk of unexpected breakdowns, and minimizing downtime. While the initial cost of the spring may be higher, the long-term benefits of improved performance, safety, and reliability far outweigh the expense.
2. Essential Tools for Measuring Torsion Springs
Before you begin measuring torsion springs, gather the necessary tools to ensure accuracy and safety. Having the right tools at your disposal will make the process easier, more efficient, and less prone to errors.
2.1 Tape Measure
A tape measure is essential for determining the length of the spring, both when it is unwound and under tension. Choose a tape measure with clear markings and a sturdy construction for accurate readings.
2.2 Calipers
Calipers are used to measure the wire size, which is the thickness of the wire used to make the spring. While micrometers and calipers are not always reliable for measuring torsion spring wire due to factors like coil bending and corrosion, they can be helpful for confirming your 20-coil measurements.
2.3 Flashlight
A flashlight is useful for locating markings on the winding and stationary cones, which indicate the inside diameter of the spring.
2.4 Screwdrivers or Wrenches
Screwdrivers or wrenches may be needed to loosen the setscrews on the winding cone if the spring is broken. Caution: If the torsion spring is still wound, do not touch the setscrews on the winding cone. Do not touch the bolts that secure the stationary cone to the spring anchor bracket.
2.5 Safety Glasses
Safety glasses are crucial for protecting your eyes from debris or unexpected spring movements during the measurement process.
2.6 Gloves
Gloves can help improve your grip on the spring and protect your hands from sharp edges or corrosion.
2.7 Notebook and Pen
Keep a notebook and pen handy to record your measurements and any relevant observations.
3. Step-by-Step Guide to Measuring Torsion Springs
Follow these steps to accurately measure torsion springs, ensuring that you gather all the necessary information for selecting the correct replacement or new spring.
3.1 Measure the Length of the Spring
The length of the spring is the distance from the first coil on one end to the last coil on the other end. Do not include the cones themselves in your measurement, but include the coils that are on the cone.
3.1.1 Measuring an Unbroken Spring
If the torsion spring is unbroken and unwound, simply measure the length of the spring using a tape measure. Ensure that the tape measure is aligned straight and that you are measuring from the outermost point of the first coil to the outermost point of the last coil.
3.1.2 Measuring a Broken Spring
If the torsion spring is broken, loosen the setscrews on the winding cone. Caution: If the torsion spring is still wound, do not touch the setscrews on the winding cone. Do not touch the bolts that secure the stationary cone to the spring anchor bracket. Once the winding cone is free to slide on the shaft, slide the two parts of the spring back together. The coils should be touching, and there should not be a gap anymore. As with the unwound spring above, measure the distance from the first coil on one end to the last coil on the other. Do not include the cones, but include the coils that are on the cones.
3.1.3 Measuring a Wound Spring
Measuring a wound spring requires determining the number of turns on the spring. To determine the unwound length of a wound spring, it is imperative that you exercise caution. Caution: Keep your fingers out of the spring and away from the winding cones – the spring could suddenly unwind at any time.
If there are paint, chalk, or crayon marks wrapping around the spring, this will be easy. The mark originally traveled across the length of the spring and did not wrap around. The torsion spring has one turn for each time the paint stripe comes back to the front of the spring.
Also, if you have a residential garage door with standard 4″ cable drums, simply deduct from the total spring length the number of coils added when the spring was originally wound. On seven-foot high doors, this would be eight coils, and on eight-foot high doors, it would be nine coils.
For example, on a seven-foot high garage door, a 34″ spring comprised of .250 wire would grow eight coils when it is wound and stretched. The spring will grow 7.5 coils, or 7.5 X .250 for the coil size, or 1 7/8″. Springs are usually stretched an extra 1/8″, so the total addition to the spring length is eight coils or two inches. The 34″ spring will measure out at thirty-six inches. Deducting eight coils from the total length will provide an accurate length of thirty-four inches.
There is another way to determine the number of turns on the springs on larger standard lift industrial doors or residential doors with non-standard drums. Measure the circumference of the cable drum, and measure the height of the garage door in inches. Divide the height of the garage door by the cable drum circumference, then add one. This is the number of turns that are on your spring. For example, a 14′ high door is 168″ high. Many of these have drums with 17″ circumferences. Dividing 168″ by 17″ would give you 9.88. Add one to this, and you get 10.88 turns, and with a little stretch, a total of 12 coils. Deducting 12 coils from the total length will give you an accurate length of the spring when it is unwound.
If you measure springs on a larger commercial or industrial door and there is not a paint stripe, and if you have a vertical-lift or high-lift garage door, it will probably be easier for you to unwind the springs than to calculate the length of the spring.
Regardless of how you determine the number of turns on a wound spring, count off one coil for each turn and measure the remaining length of the spring to determine the unwound length of the spring.
3.2 Determine the Wire Size
The wire size is the thickness of the wire used to make the spring. It is crucial to measure the wire size accurately, as even slight variations can significantly impact the spring’s performance.
3.2.1 Measuring 10 and 20 Coils
The only accurate way to measure the wire size is to measure 10 and 20 coils. Since the coils rub together when the garage door operates, the sides of the coils are less impacted by corrosion. In addition, when springs are painted, the paint does not get between the coils. The 10 and 20 coil measurements are highly accurate.
To measure 10 coils, insert the end of a tape measure between two coils or hook the tape on the end of the spring if it does not have a cone on it. Then, count 10 coils and pull the tape to the point where the 10th and 11th coils meet. Measure to the nearest 16th of an inch. Note that the hook on the end of the tape is slotted for measuring outside dimensions as well as inside dimensions. Since you are measuring the outside dimensions of the coils, you will need to pull the tape away from the end to get the correct length. Pushing the tape into the end of the ruler will give you a longer length, often 1/16″ more. Record this measurement on a piece of paper.
When measuring, make sure all the coils are compressed. If there are gaps between the coils, you will measure incorrectly and order the wrong spring.
Next, measure the width of 20 coils. We measure 20 coils because it is more accurate, and to eliminate errors from counting coils. Record the 20 coil measurement. This reading should be twice as long as your 10 coil reading. If it is not, go back and remeasure 10 and 20 coils.
If you have one spring that is broken and one that is still wound, you will need to measure 10 and 20 coils on the wound spring as well. Caution: Do not touch the setscrews on the winding cone. Do not touch the bolts that secure the stationary cone to the spring anchor bracket. Do not grab the spring.
The spring wire remains the same size after it is wound, so the measurements will not be affected. We measure both springs because about a third of the garage doors installed have unmatched springs on them. Manufacturers do this to minimize cost; service companies do it to minimize inventory. Replacing with matched torsion springs will allow you to maximize cycle life.
3.2.2 Using a Wire Gauge Chart
With the 10 and 20 coil measurements, you can determine the wire size from the chart below. Note that the dimensions are not exact, but rounded to the nearest 16th of an inch. For example, 20 coils of .177 wire will measure to be 3 1/2″ to the nearest 16th of an inch, but not exactly 3 1/2″. Dividing 3 1/2″ by 20 will give you 0.175, not 0.177.
Note: Wire sizes .200 and .237 are no longer used. If you have springs with these sizes, contact us at CONDUCT.EDU.VN, and we will calculate replacements for these. The specs generally fall between the wire sizes before and after them on the chart. The .289 was not included in our price list because of its low usage, but springs with that wire can still be made. Just contact us for prices.
If you look at the chart above, you’ll notice that there are several items in bold. These measurements are nearly equivalent to the naked eye if you measure them improperly. It is absolutely necessary that you do the 20 coil measurement for accuracy on this particular measurement. If you don’t measure properly, you can get a spring that is not strong enough for your garage door.
| 10-Coil Measurement | 20-Coil Measurement | Wire Size |
|---|---|---|
| in | cm | in |
| 1 3/4″ | 4.50 | 3 1/2″ |
| 1 7/8″ | 4.76 | 3 3/4″ |
| 1 15/16″ | 4.88 | 3 7/8″ |
| 2″ | 5.08 | 4″ |
| 2 1/16″ | 5.26 | 4 1/8″ |
| 2 3/16″ | 5.55 | 4 3/8″ |
| 2 1/4″ | 5.72 | 4 1/2″ |
| 2 3/8″ | 5.95 | 4 11/16″ |
| 2 3/8″ | 6.02 | 4 3/4″ |
| 2 7/16″ | 6.19 | 4 7/8″ |
| 2 1/2″ | 6.35 | 5″ |
| 2 5/8″ | 6.67 | 5 1/4″ |
| 2 3/4″ | 6.93 | 5 1/2″ |
| 2 13/16″ | 7.19 | 5 5/8″ |
| 2 7/8″ | 7.34 | 5 3/4″ |
| 2 15/16″ | 7.49 | 5 7/8″ |
| 3 1/16″ | 7.79 | 6 1/8″ |
| 3 1/8″ | 7.94 | 6 1/4″ |
| 3 3/16″ | 8.12 | 6 3/8″ |
| 3 5/16″ | 8.41 | 6 5/8″ |
| 3 7/16″ | 8.73 | 6 7/8″ |
| 3 5/8″ | 9.21 | 7 1/4″ |
| 3 3/4″ | 9.53 | 7 1/2″ |
| 3 15/16″ | 10.00 | 7 7/8″ |
| 4 1/16″ | 10.32 | 8 1/8″ |
| 4 7/32″ | 10.71 | 8 7/16″ |
| 4 5/16″ | 10.93 | 8 5/8″ |
| 4 3/8″ | 11.11 | 8 3/4″ |
| 4 17/32″ | 11.51 | 9 1/16″ |
| 4 5/8″ | 11.72 | 9 1/4″ |
| 4 11/16″ | 11.90 | 9 3/8″ |
| 4 7/8″ | 12.45 | 9 3/4″ |
| 5″ | 12.70 | 10″ |
| 5 5/16″ | 13.49 | 10 5/8″ |
| 5 5/8″ | 14.29 | 11 1/4″ |
| 6 1/4″ | 15.88 | 12 1/2″ |
3.3 Determine the Inside Diameter (ID)
The inside diameter (ID) of a torsion spring is the distance across the inside of the spring coil. It is essential to measure the ID accurately, as it determines whether the spring will fit properly on the shaft or mounting hardware.
3.3.1 Identifying Markings on Cones
The inside diameter of a torsion spring can be difficult to measure when the spring is on the shaft, so it is better to look for markings on the winding and stationary cones. You will need a flashlight to see these.
The more common inside diameters for residential doors will have “175” or “134” for 1-3/4″, as pictured below. Some light commercial doors may also use a 1-3/4″ inside diameter spring.
You can usually read markings on the winding or stationary cone. This winding cone says P175W*4 for a 1-3/4″ inside diameter, though it could have said “134” instead. The stationary cone should have a similar marking as well.
Embossed on springs with larger inside diameters will be the numbers “2.0,” “200,” or “2000,” corresponding to 2,” as pictured below. Raynor 2 1/4″ cones are marked with the numbers “1264,” “1265,” “1266,” and “1267.” Larger 2-5/8″ cones are marked with “258” or “263.” Residential torsion springs rarely have an inside diameter greater than 2-5/8″.
This stationary cone says P200S*5 for a 2″ inside diameter. The winding cone should have a similar marking as well. Many cones, like this one, are difficult to read.
This winding cone says “334 WS” for a 3-3/4″ inside diameter, though it could have said “375” instead.
Commercial and industrial doors, depending partly on their weight, use torsion springs with inside diameters all the way up to 8-1/2″. The markings on these cones are similar: “334” or “375” refers to 3-3/4″, “600” corresponds to 6″, etc.
3.3.2 Measuring with Calipers or a Ruler
If you cannot find any of these markings, measure the inside diameter with calipers or a ruler to the nearest 1/16″. Be careful: if you bend your tape measure to get it around the shaft, you will most likely come up with the wrong measurement, and the spring you order will not work properly.
3.3.3 Confirming with the Door Manufacturer
Once you come up with an inside diameter for your springs, confirm this dimension with the manufacturer of the garage door from the chart below if there are any identifying marks on the door.
| Inside Diameter | Door Manufacturer |
|---|---|
| 1 19/32″ | Crawford only |
| 1 3/4″ | Most manufacturers except for BarCol, Crawford, Raynor & Wagner |
| 1 13/16″ | Older Raynor and BarCol only |
| 2″ | Most manufacturers except for BarCol, Crawford, Kinnear, Raynor, Rowe & Wagner, |
| 2 3/16″ | Kinnear only. Raynor springs often measure 2 1/8″ or 2 3/16,” but they are regarded as 2 1/4.” |
| 2 1/4″ | Raynor & Rowe Way only |
| 2 7/16″ | Overhead Door only |
| 2 1/2″ | Wagner only |
| 2 5/8″ | Most manufacturers except for Crawford, Raynor & Wagner |
| 2 3/4″ | Raynor & Rowe Way only |
| 2 25/32″ | Crawford only |
| 3″ | Overhead Door only |
| 3 1/8″ | Kinnear only |
| 3 3/8″ | Overhead Door only |
| 3 1/2″ | Raynor Only |
| 3 3/4″ | Most manufacturers except for BarCol, Crawford, Overhead, Raynor, Rowe & Wagner |
| 3 25/32″ | Crawford only |
| 4″ | Wagner only |
| 4 1/8″ | Kinnear only |
| 4 3/8″ | Overhead Door only |
| 4 1/2″ | BarCol & McKee only |
| 4 7/8″ | Rowe Way only |
| 5 1/8″ | Kinnear only |
| 5 1/4″ | Most manufacturers except for BarCol, Crawford, McKee, Overhead, Raynor, Rowe & Wagner |
| 5 1/2″ | Raynor only |
| 5 3/4″ | BarCol only |
| 5 7/8″ | Overhead Door only |
| 6″ | Most manufacturers except for BarCol, Kinnear, Overhead, Raynor, Rowe & Wagner |
| 6 1/2″ | Kinnear only |
| 7 5/8″ | Overhead Door only |
| 8 1/2″ | Kinnear only |
3.4 Determine the Wind of the Spring
Determining the wind of the spring is crucial for ensuring that you install the correct spring in the proper location. The wind refers to the direction in which the spring is coiled.
Left wind torsion springs have the wire ending on the left when viewed from the end of the spring.
3.4.1 Identifying the Wind Direction
This is the most confusing part of measuring springs, so you will need to be careful. Examine the drawing to the right. Notice that when the end of the coil is on the bottom, it points to the left. The spring on the left in the drawing is left wind. This is one way to identify the wind.
Another way to determine spring wind is to make a fist, as shown to the left. Notice that the thumb points down and into the “spring,” and the index finger curls in the direction of the end of the “spring.” A spring following this image of the hand is a right wind spring. A spring following the mirror image created by the left hand is a left wind spring.
Caution: Do not wrap your hand around a wound torsion spring.
On most residential garage doors, the spring to the left of the center support bracket is right-wind, and the spring to the right is a left-wind spring. In other words, the right wind spring is typically on the left side above the garage door, and the left wind spring is above the right side of the door as you view the door from inside the garage.
4. Understanding Different Types of Torsion Spring Ends
Most torsion springs have standard ends that are bent out slightly. However, some applications require special ends to accommodate specific mounting configurations or operational requirements.
4.1 Standard Ends
Standard ends are the most common type of torsion spring ends. They are bent out slightly to provide a secure attachment point for the spring.
4.2 Special Ends
If the spring you are ordering needs special ends, let us know at CONDUCT.EDU.VN. Otherwise, you will receive a spring with standard ends.
For example, Crawford and older BarCol springs pictured use end cones that are no longer available. If you would like to reuse your cones, you can order springs without cones.
5. Measuring Clopay and Ideal EZ-Set Springs
Measuring Clopay and Ideal EZ-Set springs can be more challenging than measuring standard torsion springs due to their unique design and construction. These springs often have gaps between the coils, which can make it difficult to obtain accurate measurements.
5.1 Measuring a Broken EZ-Set Spring
The most challenging torsion springs to measure are the EZ-Set springs because there are gaps between the coils. In order to measure the length of a broken spring, you will need to press the ends of the spring together. Often the black spacer will prevent full compression, so you will need to measure the length of each piece separately while pressing the ends together to remove the gaps between the coils. After that, add the lengths of the two pieces.
In order to measure 10 and 20 coils on a broken spring, you will need to press the coils together while pulling the opposite direction on your tape measure to measure the 10 and 20 coils. It is best to mark the 10 and 20 coils before squeezing the ends of the spring together to measure the coils.
5.2 Measuring an Unbroken EZ-Set Spring
In order to measure an unbroken spring, you will need to place a coin between two coils in the middle of the spring. Next, push the coils to the left and measure the length of the left side of the spring. Then push the coils to the right of the coin to measure the spring length to the right of the coin. If the spring is still wound, you will need to deduct the width of a coil for every turn of tension on the spring.
5.3 Providing Garage Door Information
Since measuring the springs can be so difficult, many customers prefer to provide the garage door width, height, and model number. The model number is often embedded in the serial number or PID number located at one end of the garage door.
If you call us at conduct.edu.vn with information from the stickers, we can usually determine the springs you need.
6. Torsion Spring Selection: Beyond Measurement
While accurate measurement is the foundation, selecting the right torsion spring involves more than just dimensions. It’s crucial to consider the application, material, and spring rate to ensure optimal performance and longevity.
6.1 Understanding the Application
The intended use of the torsion spring is a primary factor in selection. Garage door springs, for instance, require different specifications than those used in industrial machinery or automotive suspensions. The weight of the load, frequency of use, and environmental conditions all play a role in determining the appropriate spring.
6.2 Material Selection
Torsion springs are typically made from high-carbon steel, but other materials such as stainless steel, chrome silicon, and beryllium copper may be used for specialized applications. High-carbon steel offers excellent strength and durability for most applications, while stainless steel provides corrosion resistance in harsh environments. Chrome silicon and beryllium copper offer enhanced fatigue life and temperature resistance for demanding applications.
6.3 Determining Spring Rate
The spring rate, also known as the stiffness, is the amount of torque required to rotate the spring a certain angle. It is a crucial factor in ensuring that the spring provides the appropriate amount of force for the application. The spring rate is determined by the wire size, inside diameter, number of coils, and material properties.
6.4 Considering Cycle Life
The cycle life of a torsion spring is the number of times it can be loaded and unloaded before it fails. The required cycle life depends on the frequency of use and the desired lifespan of the application. Selecting a spring with a higher cycle life will ensure greater reliability and reduce the need for frequent replacements.
6.5 Factoring in Safety
Safety is paramount when selecting torsion springs, particularly in applications where failure could result in injury or property damage. It’s crucial to choose a spring with a sufficient safety factor to withstand unexpected loads or stresses. Consulting with a spring expert or engineer can help ensure that you select a spring that meets all safety requirements.
7. Common Mistakes to Avoid When Measuring Torsion Springs
Measuring torsion springs can be tricky, and even experienced individuals can make mistakes. Being aware of these common pitfalls can help you avoid errors and ensure accurate measurements.
7.1 Measuring Wound Springs Inaccurately
Measuring wound springs can be challenging, as the coils are compressed and the length is shorter than the unwound length. It is crucial to accurately determine the number of turns on the spring and deduct the corresponding length from the total measurement.
7.2 Incorrectly Measuring Wire Size
Measuring wire size with calipers or micrometers can be unreliable due to coil bending, corrosion, and paint coatings. The most accurate method is to measure 10 and 20 coils and use a wire gauge chart to determine the wire size.
7.3 Overlooking Markings on Cones
The winding and stationary cones often have markings that indicate the inside diameter of the spring. Overlooking these markings can lead to inaccurate measurements and the selection of the wrong spring size.
7.4 Neglecting to Consider Spring Wind
The wind of the spring is crucial for ensuring that you install the correct spring in the proper location. Neglecting to consider the wind can result in improper installation and potential damage to the mechanism.
7.5 Not Accounting for Special Ends
Some applications require special ends to accommodate specific mounting configurations or operational requirements. Failing to account for special ends can result in the selection of a spring that does not fit properly or function correctly.
8. The Role of Professional Spring Suppliers
While this guide provides a comprehensive overview of how to measure torsion springs, consulting with a professional spring supplier can offer valuable expertise and ensure that you select the right spring for your application.
8.1 Expertise and Guidance
Professional spring suppliers have extensive knowledge and experience in spring design, manufacturing, and application. They can provide valuable guidance in selecting the appropriate spring material, dimensions, and spring rate for your specific needs.
8.2 Custom Spring Design
If you require a torsion spring with specific dimensions or performance characteristics, a professional spring supplier can design a custom spring to meet your exact requirements.
8.3 Quality Assurance
Reputable spring suppliers adhere to strict quality control standards to ensure that their springs meet the highest levels of performance and reliability.
8.4 Cost Savings
While it may seem counterintuitive, consulting with a professional spring supplier can actually save you money in the long run. By selecting the right spring for your application, you can minimize the risk of premature failure, reduce the need for frequent replacements, and optimize the performance of the mechanism it supports.
9. Safety Precautions When Handling Torsion Springs
Torsion springs store a significant amount of energy, and improper handling can result in serious injury. It is crucial to follow strict safety precautions when working with torsion springs.
9.1 Wear Safety Glasses and Gloves
Always wear safety glasses and gloves to protect your eyes and hands from debris or unexpected spring movements.
9.2 Avoid Touching Wound Springs
Never touch the setscrews on the winding cone or the bolts that secure the stationary cone to the spring anchor bracket when the spring is wound. The spring could suddenly unwind, causing serious injury.
9.3 Use Proper Tools
Use the correct tools for the job, and ensure that they are in good working condition. Using improper tools can increase the risk of accidents and injuries.
9.4 Seek Professional Assistance
If you are not comfortable working with torsion springs, seek professional assistance from a qualified technician.
10. Case Studies: Real-World Applications of Torsion Spring Measurement
To illustrate the importance of accurate torsion spring measurement, let’s examine a few real-world case studies.
10.1 Garage Door Spring Replacement
A homeowner attempted to replace a broken garage door spring without accurately measuring the existing spring. They purchased a spring that was too short and had the wrong wire size. As a result, the garage door was difficult to open and close, and the new spring failed after only a few months.
10.2 Industrial Machinery Repair
A maintenance technician replaced a torsion spring in an industrial machine without consulting the manufacturer’s specifications. They selected a spring with the wrong spring rate, which caused the machine to operate erratically and damaged other components.
10.3 Automotive Suspension Upgrade
An automotive enthusiast attempted to upgrade the suspension of their car by installing aftermarket torsion bars. They did not properly measure the existing torsion bars and selected replacements that were too stiff. This resulted in a harsh ride and reduced handling performance.
In each of these cases, the individuals involved could have avoided costly mistakes and potential safety hazards by accurately measuring the existing torsion springs and consulting with a professional spring supplier.
11. Frequently Asked Questions (FAQ) About Torsion Springs
Here are some frequently asked questions about torsion springs, along with their answers:
- What is a torsion spring?
A torsion spring is a mechanical device that stores energy when it is twisted or rotated. - What are torsion springs used for?
Torsion springs are used in a wide variety of applications, including garage doors, industrial machinery, automotive suspensions, and consumer products. - **How do I measure a
