Torsion Axle Vs. Leaf Spring: The Similarities And Differences (2022)

Over time, there has always been an argument on which trailer axles and suspension work best. However, without any debate, all the axles have their functions and reasons to choose ahead of one another.

While some offer a smooth ride and seem pretty expensive, some, on the other hand, are affordable and easy to maintain.

However, out of all the axle options available, the focus has always been on the two most common axles: Torsion and Leaf Spring trailer axles.

Now, let’s get right into it!

Torsion Axle Vs. Leaf Spring: The Similarities And Differences (1)

Contents

  • 1 What Is Torsion Axle And Leaf Spring Axle?
    • 1.1 What Is A Torsion Axle?
    • 1.2 What Is A Leaf Spring Axle?
  • 2 Torsion Axle And Leaf Spring Comparison
    • 2.1 Similarities
    • 2.2 Differences
  • 3 Torsion Axle Vs. Leaf Spring Axle: Which One Is Better?
    • 3.1 Torsion Axle
    • 3.2 Leaf Spring Axle
  • 4 Our Recommendations
  • 5 Conclusion
  • 6 Frequently Asked Questions (FAQs)
    • 6.1 Do torsion axles wear out?
    • 6.2 How do I know if my leaf springs are worn?
    • 6.3 How do you maintain torsion axles?
    • 6.4 How to know the weight capacity of the trailer axle?

What Is Torsion Axle And Leaf Spring Axle?

Torsion and leaf spring axles are popular trailer axles that help the vehicle’s body maintain its balance.

What Is A Torsion Axle?

Torsion Axle Vs. Leaf Spring: The Similarities And Differences (2)

As the name implies, a Torsion axle is a torsion arm suspension system contained within the axle tube. It is attached to the trailer frame directly with brackets that are part of the axle assembly.

The dynamism of the torsion axle is based on the traditional use and ways of handling the bar suspension. And because of this unique arrangement, the torsion axle provides better suspension characteristics than leaf spring axles.

Functions

  • Trucks with torsion axle suspension have a lower bed, making loading the trailer easier.
  • Torsion axle allows the trailer to ride closer to the ground because it has a lower profile.
  • If half-torsion axles are used, each wheel can move on a torsion-axle trailer without the others.

What Is A Leaf Spring Axle?

Torsion Axle Vs. Leaf Spring: The Similarities And Differences (3)
(Video) 📊 Axle Comparison | Torsion Vs. Drop Leaf Spring Axles | Spread Axles

Like the Torsion axle, the Leaf spring axle is mounted to the underside of a trailer axle, and it is made out of a stack of curved springs (leaves).

In order to lower the trailer’s ride height, the axle is draped over the springs, which offers better load stability and makes loading and unloading the trailer easier.

Functions

  • Have a shock absorber to provide a cushioning effect.
  • Allow a structural member to support the load on it.
  • Support the trailer’s weight.

Read more: Broken Axle: Signs And Causes

Torsion Axle And Leaf Spring Comparison

The choice of which of the axles should be used depends on their similarities and differences. So, let’s get into that quickly.

Similarities

Even though they have different functions, torsion and leaf spring axles have some similarities that we cannot ignore because of their role in safely handling vehicles.

The similarities are listed below:

  • Support the trailer’s weight.
  • They are both serviceable.
  • Provide relevant recoil for the suspension component to bounce back to normal after moving on an unequal road.
  • Keep vehicles at regular standing height.

Differences

The two axles have several differences but let’s look at the three important ones.

Shape

A leaf spring axle is a thin, arc-shaped piece of spring steel with a rectangular cross-section. While the torsion axle looks like a square straight axle, the bars contain moveable parts.

How they work

A torsion axle uses cartridges inside the axle tube to control shock absorption and suspension travel. It relies solely on rubber compression to provide the necessary suspension support.

Torsion axles are connected directly to the trailer frame, which improves the trailer’s stability and construction.

(Video) Trailer Leaf Springs Or Torsion Axles?

On the other hand, a leaf spring axle can be coupled to the frame on both ends or probably one end, usually the front, with the other end connected by a shackle, a short swinging arm.

The leaf spring’s predisposition to extend when compressed is exploited by the shackle, resulting in softer springiness. In addition, the shackle gives the leaf spring a lot of flexibility, allowing it to take a lot of punishment without breaking.

Axle load

Torsion axles include thick cords made of rubber hidden inside the axle tubing. The rubber cords compress as each wheel rises and falls, providing a balanced wheel suspension and a regular ride. In addition, this axle does not “share” load.

When you drive over a minor bump, the wheel closest to the hump may end up carrying far more weight than the others. It’s only a temporary overload, but it might be severe – and if the trailer is fully loaded, it can even pop tires!

Each wheel moves and absorbs shocks independently of the others. Torsion axles are directly attached to the frame, which results in fewer moving parts and regular shock action. And this reduces flex by stiffening the frame.

The Leaf spring is, however, known for its rigidity and durability. The loading is done vertically at four locations on the frame.

Each side of the frame carries about a quarter of the total axle load to simplify loading to the trailer, and the stress that comes with it is easily handled.

Its suspensions, especially in multi-axle applications, are dependable for a smooth ride and tire wear.

The load from an undulating terrain is better absorbed by leaf springs. Therefore, each tire is equipped with its set of springs.

Read more: Car Warning Lights: What You Should Know

Torsion Axle Vs. Leaf Spring Axle: Which One Is Better?

Often, when you spend a little time with some vehicle owners, you get confused about which of the axles is better.

It isn’t easy to answer because the Torsion trailer axles provide a more comfortable ride and require less maintenance. But, on the contrary, the Leaf springs are more robust, less expensive, and have fewer parts to replace.

(Video) What's The Difference Between Spring And Torsion Axles? - Trailer Innovations - LOOK Trailers

However, it would be best to stop worrying because this will help make choices.

Torsion Axle

Each trailer wheel mounts to a short trailing arm that pivots around the central axle tube, and it always has the elastomeric rods, which most people call the “rubber cords”.

The axle does not twist like a vehicle torsion bar suspension. However, there is torque and rotational resistance.

Pros

  • Have an independent wheel suspension
  • It is mainly welded to the trailer frame
  • Make the ride smooth
  • The components are not wearable

Cons

  • Cannot be repaired
  • It is pretty expensive to replace
  • Increase the tire wear on a multi-axle configuration

Excel In Application

  • Windy environments
  • Rough roads
  • Conditions where a lower ride height is required
  • Saltwater spray environments
  • High vibration applications (like wood chippers)

Leaf Spring Axle

From research, the leaf spring happened to be the most common. The name comes from the flat spring steel between the axle and the trailer. It always comes in an arc shape, and when more load is put on them, they become flattened.

Pros

  • The part is always available
  • Welding is not required to replace this axle
  • It is cheaper to repair
  • Tires are even in multi-axle configuration

Cons

  • Sometimes noisy due to the metal component
  • More wearable components
  • It bounces more on rough roads

Excel In Application

(Video) How Different Types of Suspension System Works? Explained in Details

  • Dump trailers.
  • Utility trailers.
  • It is available in any form with just a few notable exceptions.

Read more: Nissan Dashboard Symbols and Meanings: What All Drivers Need To Know

Our Recommendations

Choosing the correct axle is as simple as calculating the loads you’ll be carrying. Whatever approach you choose, the best results will come from adequately loading your trailer to get the maximum wear out of it.

A torsion axle is recommended for trailers with light duties and soft rides. Torsion axles are not proposed for trailers with a gross weight of over 5000 pounds.

On the other hand, a leaf spring is mainly suggested when a trailer is equal in stress distribution and clean. The leaf springs give a comfortable ride when the trailer is fully loaded. Then, when the trailer isn’t completely packed, it lets a little air out of the tires for a smoother ride.

If you’re going to use a torsion axle, be sure the trailer structure is strong enough to take the extra weight, but you can tell that the leaf spring axles work for most trailers.

Conclusion

It doesn’t matter which of the axles are involved; the fact remains that there are no trailers without them.

These hidden parts are essential even though they are primarily out of sight.

Generally, trailer axles are valuable for people who rely on your trailer to make a living.

Frequently Asked Questions (FAQs)

Do torsion axles wear out?

Yes. Any axle can wear down to the point where it needs to be replaced over time. Because the suspension is incorporated into a torsion axle, replacing the axle would be the only option if the suspension portion failed.

How do I know if my leaf springs are worn?

Whenever a truck is loaded above its limit, the leaf spring automatically flattens out, lowering the truck’s height.

How do you maintain torsion axles?

Unlike the leaf spring, the Torsion axle doesn’t need day-to-day maintenance. Instead, it only requires that the trailer be towed.

How to know the weight capacity of the trailer axle?

The axle’s load capacity and weight rating are always written on the trailer’s VIN plate or sticker as the Vehicle Identification Number (VIN).

You can also use the diameter of the axle to measure the axle’s weight capacity.

FAQs

What is the difference between leaf springs and torsion type axles? ›

Torsion trailer axles offer a smoother ride and less maintenance. Leaf springs are more durable, less expensive and far easier to replace parts on. Selecting the proper axle is as simple as determining your application, and figuring out the loads you need to carry.

What is leaf spring axle? ›

A leaf spring axle is the most common and well known axle. They consist of a stack of curved springs (leaves) and are attached to the underside of a trailer axle. The axle is slung over the springs in order to reduce the ride height of the trailer.

How does a torsion axle work? ›

Torsion axles work by using rubber cords or cartridges inside the axle tube to handle suspension travel and shock absorption. Torsion axles do not use leaf springs, but instead the compression of the rubber to supply the suspension support needed. Each wheel works independently from one another.

Are torsion axles good for off road? ›

Torsion axles work well on road, I have them on my horse trailer, but off road they just don't perform well. Failure of a torsion axle is not repairable in the field the closest you can come to it is welding a gusset in place to solidify the broke arm.

What is a leaf axle? ›

Leaf spring axles are used in the majority of the trailers we stock. They are made up of stacked spring leaves and are assembled over or under the trailer's axle. Take a look at these images to get an idea of what that looks like: Benefits of leaf spring axles: Reliable and equal distribution of tire wear.

What's inside a torsion axle? ›

Torsion Axles & How To Shorten Them - YouTube

What are leaf springs used for? ›

Leaf springs are an integral part of your vehicle's suspension system. They are installed to help support the entire weight of your car or truck. Leaf springs also help to maintain the tyres grip on the road and regulate the wheelbase lengths when it is speeding up or slowing down.

How long will a torsion axle last? ›

Subject: RE: Rubber Torsion Axle Life Expectancy? the lifespan is 15-20 years.... no matter how many miles towed or how stored (weight off frame, etc.)

Are torsion axles reliable? ›

Torsion axles offer a low maintenance, reliable, quiet, smooth ride. HSI Duratek torsion axles make it simple to have peace-of-mind while trailer towing.

How do you adjust a torsion axle? ›

How To Adjust A Torsion Axle - YouTube

How do you maintain torsion axles? ›

Torsion Axle Maintenance Torsion axles do not require any regular maintenance, unlike springs that need constant review for worn or loose parts. Spring axles must be checked regularly to make sure the spring surfaces are not corroded, creating a weak point in the suspension.

How do you mount a torsion axle? ›

Part 84 (Install 3500 lb. Flexride Torsion Axle) - YouTube

What is the advantage of a torsion axle? ›

Torsion axles are mounted directly to the frame which means fewer moving parts compared to spring suspensions, resulting in a smoother shock action. This stiffens the frame, reducing flex. This system is also less likely to corrode because the axle tube is galvanized inside and out.

Can you flip a torsion axle? ›

Otherwise, if you have a rubber torsion suspension, you have to have a welding shop add spacers between the frame and the axle. You may can flip the axles, but don't. Most have a camber built in to them, in other words they are bowed up in the middle.

Can you rebuild torsion axles? ›

Torsion axles use internal rubber cords to provide the suspension motion and they really are not practical to repair/rebuild. Certainly any axle that was damaged in an accident should be replaced purely for safety reasons.

Why is it called a leaf spring? ›

The leaf spring is named after the leaf because it's very similar to adding many leafs on top of each other. The arc is very slender, and it usually has a gap, it can be connected to a bottom piece which will have a slender gap. It's not difficult to make at all. The leaf spring is hardly ever used today.

How does a leaf spring work? ›

Animation How leaf spring works. - YouTube

What is the type of leaf spring? ›

Two leaf spring suspension types exist – mono and multi. Mono leaf springs only have a single piece of metal.

Can a torsion axle be welded? ›

Expert Reply: Torsion axles use internal rubber cords that make it tricky to weld them, such as for installation of a brake flange to let you install electric drum brakes on the axle.

How do you check a torsion axle? ›

How to Measure a Torsion Axle - trailercanada.com - YouTube

What is leaf spring made of? ›

Springs are mechanical devices that are capable of storing mechanical energy because of their elasticity. Springs are often made of coiled, hardened steel, although non-ferrous metals such as bronze and titanium and even plastic are used.

What vehicles use leaf springs? ›

Today leaf springs are still used in heavy commercial vehicles such as vans and trucks, SUVs, and railway carriages. For heavy vehicles, they have the advantage of spreading the load more widely over the vehicle's chassis, whereas coil springs transfer it to a single point.

Where are leaf springs used in cars? ›

automobiles. The leaf spring is used mainly for vehicle suspension and in one form consists of a stack of slightly curved narrow plates of equal width and varying length clamped together, with the shorter plates in the centre to form a semielliptical shape.

How do you replace a torsion axle spindle? ›

Dexter Torflex Removable Spindle - YouTube

Is torsion suspension good? ›

The main advantages of a torsion bar suspension are soft ride due to elasticity of the bar, durability, easy adjustability of ride height, and small profile along the width of the vehicle. It takes up less of the vehicle's interior volume than coil springs.

How do you lift a trailer with torsion axles? ›

etrailer | Dexter Axle Torflex Lift Kit Review - YouTube

What is the best trailer suspension? ›

Leaf spring suspension arguably the most common and cost effective type of trailer suspension. This suspension design is made up of a series of curved springs (leaves) that are stacked and attached to the underside of the trailer's axle using hangers and U-bolts.

Can you adjust the height on torsion axles? ›

No! The is no adjustment that can be made to the axle unit itself.

Can you widen a torsion axle? ›

No, you cannot. In fact you can't even weld on them or the rubber melts, burns or just plain turns to charcoal. I'd never have another trailer with torsion axles myself, you're just limited too much with modifications down the road.

Is my torsion axle worn out? ›

If the deflection, or amount of travel of the wheels, on the torsion axle has increased, caused the trailer to bottom out, or is not the same on each side then that would be a good indication that something is wrong. Having the weight off of the tires if the trailer will be sitting in the off season is not a bad idea.

What is independent torsion suspension? ›

Torsion bar suspension, sometimes known as torsion spring suspension, is any vehicle suspension that uses a torsion bar as its main weight-bearing spring. Independent torsion bar suspension uses the same technology, but applies it to each wheel rather than the entire axle.

Do torsion axles have camber? ›

All torsion axles are built with camber.

Camber is important because it properly aligns your tires.

Do torsion axles break in? ›

Because of their attached construction, torsion axles do not have replaceable or repairable parts to deal with when they break. If the axles are ever faulty, you will have to replace the entire suspension system by cutting off the old one and installing new.

How can I make my trailer higher? ›

One common way to lift your trailer is by "flipping" your axles. Flipping your axles just means moving your suspension from below the axle (standard, "underslung" springs) to above the axle ("overslung" springs) in order to create more clearance between the underside of the trailer and the road.

How do you increase ground clearance on a trailer? ›

Ways to raise the height of a trailer for better ground clearance include using larger wheels/tires and installing an axle over-under kit that reverses the placement of the springs and axle.

How long do torsion axles last? ›

Subject: RE: Rubber Torsion Axle Life Expectancy? the lifespan is 15-20 years.... no matter how many miles towed or how stored (weight off frame, etc.)

Are torsion axles good for boat trailers? ›

Having a good quality axle means you are worry-free. Torsion axles offer a low maintenance, reliable, quiet, smooth ride. HSI Duratek torsion axles make it simple to have peace-of-mind while trailer towing.

Can you flip a torsion axle? ›

Otherwise, if you have a rubber torsion suspension, you have to have a welding shop add spacers between the frame and the axle. You may can flip the axles, but don't. Most have a camber built in to them, in other words they are bowed up in the middle.

Can torsion axles be repaired? ›

Torsion axles use internal rubber cords to provide the suspension motion and they really are not practical to repair/rebuild. Certainly any axle that was damaged in an accident should be replaced purely for safety reasons.

Over time, there has always been an argument on which trailer axles and suspension work best. However, without any debate, all the axles have their functions and reasons to choose ahead of one another.While some offer a smooth ride and seem pretty expensive, some, on the other hand, are affordable...

However, out of all the axle options available, the focus has always been on the two most common axles: Torsion and Leaf Spring trailer axles.. 1 What Is Torsion Axle And Leaf Spring Axle?. 3.1 Torsion Axle 3.2 Leaf Spring Axle. Torsion and leaf spring axles are popular trailer axles that help the vehicle’s body maintain its balance.. Like the Torsion axle, the Leaf spring axle is mounted to the underside of a trailer axle, and it is made out of a stack of curved springs (leaves).. Axle load Torsion axles include thick cords made of rubber hidden inside the axle tubing.. If you’re going to use a torsion axle, be sure the trailer structure is strong enough to take the extra weight, but you can tell that the leaf spring axles work for most trailers.

In the discussion of trailer axle leaf springs versus a torsion axle, let’s put some engineering behind the debate. I don’t want to change opinions, but I would like to offer a practical perspective. I have not seen this kind of analysis in other places, so maybe it will help you too? It’s just one...

In the discussion of trailer axle leaf springs versus a torsion axle, let’s put some engineering behind the debate.. Though there are many spring style trailer axle configurations, leaf springs are by far the most common.. The name “torsion axle” comes from the resistance to a moment load inside the trailer axle tube.. First , when we examine the trailer frame in the area where the axle mounts, loading on the trailer frame is quite different for a torsion axle as compared toa leaf spring style.. Leaf Spring Trailer Axle For leaf springs, the loading is effectively vertical, at fourlocations on the frame.. The image shows the stress distribution on a trailer frame main beam when supporting a leaf spring style axle.. Torsion Trailer Axles The torsion axle is very different because of the torque applied through the trailing arm (or torsion arm), to the axle beam, to the trailer frame.. Basically, since there is only one areaof connection on each side of the trailer, the axle assembly exerts a force being1/2 the vertical axle load PLUS a moment load of the trailing arm.. When using any axle, the trailer frame must be designed to handle the expected loads — not only the actual loading of the trailer, but also the dynamic and impact loading that can occur as the trailer travels.. Not In Tandem We do NOT recommend using torsion axles for multiple axle trailers .

When it comes to what's underneath your car, it's pretty easy not to pay much attention, unless it's a traffic cone, a wombat, or the sky.

Most of these arcane setups are outmoded these days, thanks to the two predominant methods widely adopted for keeping your car's rear end in check: semi-dependent torsion bars and fully independent suspension systems.. Keeping the wheels independent of each other but still connected requires more than a bit of tricky engineering. The motion of each wheel is isolated – independent, if you will – from the other, free to move and react without introducing sympathetic movements on the other side of the car.. Keeping the wheels independent of each other but still connected to the body, brakes and drive shafts requires more than a bit of tricky engineering.. Engineers have tackled this problem with varying degrees of complexity, but the best known are the MacPherson Strut, double wishbone and multi-link systems.. Next to dual wishbone and multi-link systems, the MacPherson offers little in the way of control, isolation or adjustability.. Multi-link and dual wishbone systems are the holy grail of suspension designs, allowing engineers to achieve agile handling without compromising ride quality.. Both multi-link and dual-wishbone setups offer true independence and unparalleled control, with the multi-link system edging ahead of the double-wishbone choice by offering greater adjustability.. Multi-link and double-wishbone independent setups are the most expensive and complex, as well as taking up more space than the simpler and slighter torsion beam.. Finding dual wishbone or multi-link suspension in your prospective new car usually means heading to the more premium end of the hatchback,wagon and sedan markets.. And it really is as simple, and ingenious, as that; a bar connecting both wheels that twists ever so slightly under duress, in order to give a degree of independence to each wheel's movements.. Torsion bars take up less vertical space than MacPherson strut setups and less horizontal space than double wishbone and multi-link systems, netting more room for humans in the cabin and their stuff in the boot.. Torsion-beam setups are relatively cheap and easy to manufacture, install and maintain, but they don't offer the engineer anywhere near the same amount of freedom to balance comfort, agility and stability as independent systems do.. Because torsion bars offer less isolation than independent systems, they can also allow more noise, vibration and harshness to filter into the cabin.. It's only when demands for comfort, poise and stability outstrip what engineers can achieve with the torsion beam that independent systems really come into their own.

Some terms and facts to know when choosing a trailer axle - Leaf Springs or Torsion Axles - like measurements so they fit and function.

Also, be sure to match springs and tires, because the real capacity is the lesser of Axle Capacity, Spring Capacity, or Tire Capacity.. For positioning the axle fore and aft on the trailer, the article on Calculating Axle Position may interest.. Because Torsion Axles don’t have springs to mount, it’s the bracket width (usually meaning the outside dimension of the frame members or Frame Width ) that defines it’s Mounting Position.. Axle Spacing (for Multiple Axles) For Multiple Axle trailers, the distance from axle centerline to axle centerline is the axle spacing.. Overslung or Underslung Since it’s easier to illustrate than to explain, the image shows a pair of trailer axles — one with the springs mounted on top (or Overslung), and one with the springs mounted underneath (or Underslung).. Wheel and Tire Size Though technically not an axle part, choices about trailer wheels , including the Tire Type are very interrelated.. With this info, we can make the measurements for the trailer — or maybe more accurately — take measurements FROM the trailer (before ordering trailer axles).. Clearance for the axle is set by being a Drop or Straight axle ( No-Load Arm Start Angle for torsion axles) and the tire outside diameter.. Load Capacity Spring Centers Hub Faces Straight Or Drop Underslung or Overslung Hub Bolt Pattern Brakes or not, and what type – Drum or Disc – Electric or Hydraulic Spring Type and Length Axle Camber — Yes or No. Or, if you want to switch the trailer axles — convert from springs to torsion (for single axles) , we have Torsion Axle Conversion plans available.. More New Product Announcements: The Mechanical Elements line of DIY Trailer Blueprints has just expanded – AGAIN – with more trailer plans for torsion axles.

In this article you will learn about different suspensions types such as coil springs, leaf springs and torsion bar suspension systems, their functions and how their...

When you think it's time to replace those coil springs, we've got a wide range of replacement standard height coil springs as well as coil springs to enhance the vehicles ride height under our Coil Spring Suspension category.. Every coil spring we supply are manufactured pecifically for RoughTrax with spring rates, design and specifications taken from the original Toyota coil spring, this way you can be assured the pig tailing, quality of materials & thickness of the coil will be as per the original or uprated for enhanced performance.. When a lot of weight is being carried, leaf springs spread the load out more evenly across the vehicle's chassis than coil springs or torsion bars.. This mounting also requires leaf springs to have a stiffer spring rate - reducing ride comfort levels that softer springs would provide.. You can view alternatives for replacement leaf springs under our Leaf Spring Suspension category, we have a wide range of standard uprated replacements and leaf springs to enhance the vehicles ride height.. Every leaf spring we supply are manufactured specifically for RoughTrax in the UK with spring rates, design and specifications taken from the original Toyota leaf spring, this way you can be assured the quality of materials & thickness of the leafs will be as per the original or heavy duty for enhanced performance.. Whether your vehicle uses coil springs, leaf springs or torsion bars (or a combination) replacing them will bring noticeable "quality-of-life" improvements that you'll feel in your hands and in your seat.

Leaf springs are all but dead as a technology in the car world. But surely they must have had some merits? Let us explain...

However, you don’t need to look back too far to find mass produced cars from the Western World that featured the leaf spring suspension.. Most leaf spring setups are formed into an elliptical shape through the use of spring steel which has properties that allow it to flex as pressure is added at either end, but then returning to its original position through a damping process.. The elasticity of the spring steel allows for a pliancy within the suspension for comfort and control of a car while moving, and a leaf spring setup has been proven as a viable option for cars for many decades, despite only really being found on HGVs and Military vehicles these days.. Due to the sheer amount of metal layered together, leaf springs offer a large amount of support between the wheels, axles and the car’s chassis.. Vertical loading is also distributed throughout the length of the leaf spring rather than acutely through a small spring and damper, which can potentially create a concentrated force too large for the suspension to handle.. Leaf springs coped much better with vehicle damping due to the friction between each plate of steel which made the response time after a vertical flex in the suspension much quicker, thus making for a much more controllable car.. Leaf springs were simple in design and cheap to produce in comparison with the early springs and dampers therefore it was the go-to setup once cars were being fully mass produced to ensure reliability while keeping costs low.. Monoleaf springs were the simplest design of the lot, using only one leaf of spring steel which tapered from thick in the middle to thin at the edges (known as parabolic leaf springs) to distribute the vertical loads appropriately.. This lack of adjustability of leaf setups is emphasised by the fact that the ends of the leaf springs are attached to the chassis, which leaves very little scope for shortening or lengthening of the leafs.. In comparison with a helical spring, leaf springs are generally much stiffer simply down to the steel construction and the tight package that they are bolted and clamped into.. Ride comfort is therefore not a feature of vehicles that use leaf springs which made their popularity decrease dramatically after proper dampers were introduced in the 1970s to everyday cars in a cost-effective manner.. The FRP monoleaf system can handle ten times as many cycles as the steel equivalent and the lack of interaction between leafs that occurs in a multileaf spring means that the suspension stays pliant, upholding the levels of handling and ride comfort.. With only commercial vehicles still using leaf springs for suspension for the most part, you’ll have to hark back a few decades to find ‘performance’ cars with that kind of suspension - Corvette aside, of course.. From a gladiator’s chariot to a Ford Mustang GT, the leaf spring certainly had its time at the forefront of vehicle damping but despite its simple design, the age of the spring and damper is well and truly in full swing.

The Ford Axle Code Chart is crucial in identifying the correct make and model of the rear axle. Click here to know why.

You will need to look at the Ford axle code chart to replace your Ford rear-end axle parts.. That is your vehicle’s axle code.. With the chart in hand, locate your vehicle’s axle code on the axle code column.. As you proceed to the Ford Axle Code chart, you will notice that the table indicates it has a Ford 8.8″ Limited Slip Differential with an Axle Ratio of 3.55.. Ford Axle code identification

For me, a person who has had "Blow outs" on RV trailers, it's the safety factor. After the blow out one can pull to safety on three of the tires. The drum, axle, and trailer receive less stress.

Topic: single vs. double axles, torsion vs. leaf Posted By: krnmsn. on 10/26/11 04:46am. What are the advantages and disadvantages of different types and numbers of axles?. Posted By: KD4UPL. on 10/26/11 11:32am. I switched form a single axle trailer to a tandem axle trailer for hauling my boat.. Posted By: skipnchar. on 10/26/11 07:39am. Tandam axles carry more weight with greater stability than a single axle trailer but are MUCH harder on tires (thus the high frequency of blow outs).. Tend to travel in a straight line very easy with no sway when things are right where as many single axle trailer seem to have some amount of trailer sway even when things are corect.Torsion axles tend to ride quite a bit smoother than leaf springs probably mostly because of the far less sprung weight.. Posted By: Sunbird. on 10/27/11 11:47pm. We have had a 16' single axle with leaf springs, two 20' tandem axle with leaf springs and two 17' Casitas single torsion axle.I find the better aerodynamics of the Casitas make more difference than the axle count.. I wanted double axles but I wanted a very small trailer, so my new trailer (a Fun Finder X-139) has single axles -- I could not find a little trailer with two axles.. Posted By: acadianbob. on 10/27/11 09:49am. A WD hitch would transfer some tongue weight back to the trailer axle and therefore MIGHT reduce the bouncing you describe.FWIW, I prefer torsion axles for another reason not yet mentioned.. Posted By: ExRocketScientist. on 10/27/11 10:18am. Tandem axles with springs can be made to be almost as smooth as torsion axles.. I wanted double axles but I wanted a very small trailer, so my new trailer (a Fun Finder X-139) has single axles -- I could not find a little trailer with two axles.. I may go with the 17 foot Casita, also single axle, but my 11'Nissan Frontier (6300 lb max tow, 125 in WB) would pull the smallest of the tandem axle trailers.

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What is a torsion axle?. Burkholdertrailers.com A torsion axle is a form of combined axle and suspension unit where the deflection of the suspension is provided by the torsion, or twisting, of the axle bar within a steel sleeve that is lined with rubber compounds to provide rotational resistance.. The trailer torsion axle applies the torsion bar technology to a trailer axle, thus allowing the trailer to ride smoothly without the aid of conventional spring and …. Hsiduratek.com Our Dexter rubber torsion axles have internal rubber cords that provide load carrying capacity verses leaf spring type axles.. A rubber torsion axle mounts directly to the travel trailers frame and will resist torsion and create a suspension system that is an upgrade that comes standard compared to the typical leaf spring axle.. The torsion bar is restrained by synthetic rubber cores inside a steel square tube axle directly fastened to the trailer chassis.. Spitfiresa.com.au Torsion axles are connected directly to the trailer frame, which improves the trailer’s stability and construction.. On the other hand, a leaf spring axle can be coupled to the frame on both ends or probably one end, usually the front, with the other end connected by a shackle, a short swinging arm.. Torsion axle is a kind of trailer suspension which is different from leaf spring trailer suspension.. Use of cookies.. Knott by Treadway offers Jockey Wheels, Stands, Torsion Axles, Trailer Chassis, Trailer Kits, and Trailer Componentry.. Since the axles are not in the trailer the .... Etrailer.com A torsion bar suspension, also known as a torsion spring suspension, is any vehicle suspension that uses a torsion bar as its main weight-bearing spring.

What is a suspension system? How it works? and what are different types of suspension systems used in automobile vehicles? PDF download

Independent front suspension Twin I-Beam Suspension System Single I-Beam Front Suspension System Independent Front End Suspension Using Torsion Bar Parallelogram Type Independent Front Suspension Struck and Link Type Suspension System Trailing Arm Independent Front Suspension Sliding Types Suspension System Vertical Guide Suspension System. Rear End Suspension System Longitudinal leaf spring rear end suspension Transverse leaf spring rear end suspension Coil spring rear end suspension. Independent Front End Suspension Using Torsion Bar This type of suspension system, a steel rod, known as a torsion bar, act as a spring to hold the upper and lower control arms parallel under load.. Longitudinal leaf spring rear end suspension Transverse leaf spring rear end suspension Coil spring rear end suspension. Longitudinal and Transverse Leaf Spring Rear End Suspension Longitudinal leaf spring and coil spring rear end suspensions are widely used in modern vehicles.. Coil Spring Rear End Suspension The figure shows coil spring rear end suspension.. De-Dion and Independent Type Coil Spring Rear End Suspensions The figure shows De-Dion and independent type coil spring rear end suspensions.

Introduction to Spring Springs are elastic bodies (generally metal) that can be twisted, pulled, or stretched by some force. They can return to their original…

– Used in Vehicle suspension springs, Railway buffer springs, Buffer springs in elevators, Vibration mounts for machinery To store energy – Used in Springs used in clocks, toys.. There are two basic types of helical springs: compression spring and tension spring.. helical spring diagram It should be noted that although the spring is under compression, the wire of helical compression spring is not subjected to compressive stress.. The conical and volute springs are used in special applications where a telescoping spring or a spring with a spring rate (load required per unit deflection) that increases with the load is desired.. The construction of this spring is similar to that of compression or tension spring, except that the ends are formed in such a way, that the spring is loaded by a torque, about the axis of the coils.. compression spring nomenclature When the compression spring is compressed until the coils come in contact with each other, then the spring is said to be solid.. The spring rate (or stiffness or spring constant) is defined as the load required per unit deflection of the spring.. When one end of a helical spring is resting on a rigid support and the other end is loaded suddenly, then all the coils of the spring will not suddenly deflect equally, because some time is required for the propagation of stress along the spring wire.

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