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The axle (also known as the axle) is connected to the frame (or load-bearing body) through the suspension, and wheels are installed at both ends. Its function is to transmit the forces in all directions between the frame (or load-bearing body) and the wheels.

The axle can be integral, like a huge barbell, with both ends supporting the body through the suspension system, so the integral axle usually cooperates with the non-independent suspension; the axle can also be disconnected, like 2 Umbrellas are inserted on both sides of the body, and then each supports the body through the suspension system, so the disconnected axle is used with the independent suspension.

    According to the different driving methods, the axles are also divided into 4 types: steering axles, drive axles, steering drive axles and support axles. Among them, the steering axle and the supporting axle belong to the driven axle. Most cars use front rear drive (FR), so the front axle acts as a steering axle and the rear axle acts as a drive axle; while in a front-front drive (FF) car, the front axle becomes the steering drive axle and the rear axle acts as a support axle.

    The structure of the steering axle is basically the same, consisting of 2 steering knuckles and a beam. If the beam is compared to the body, the steering knuckle is his head swaying from side to side, the neck is what we often call the kingpin, and the wheels are mounted on the steering knuckle, as if wearing a straw hat on his head. However, when driving, the straw hat turns, but the head does not turn. The middle is separated by a bearing, and the head just sways from side to side. The neck-kingpin is the axis of rotation of the wheel. The axis of this axis is not perpendicular to the ground, and the wheel itself is not perpendicular. We will discuss it in detail in the section on wheel positioning.

    The difference between the steering drive axle and the steering axle is that everything is hollow, the beam becomes the axle housing, and the steering knuckle becomes the steering knuckle housing, because there are more drive shafts inside. This driveshaft becomes 2 half shafts because it is divided in 2 by the differential located in the middle of the axle housing. The 2 straw hats are not simply put on the head, but also directly connected to the 2 half shafts inside. The half shaft also has 1 more joint at the “neck” position – a universal joint, so the half shaft has also become 2 parts, the inner half shaft and the outer half shaft.
Company Description
ZheJiang CZPT Trading Co., Ltd. was established in 2571. The company is located in HangZhou City, ZheJiang Province, where CZPT is located, 1 of the largest truck parts distribution centers in China.
The company adheres to the business policy of “quality first, service first, continuous improvement, innovation to satisfy customers”, and takes “high quality, high standard” as the quality goal.
Our products are of high quality and reasonable price and enjoy a good market all over the world. Our company pays attention to integrity and commitment, and makes customers feel respected and efficient. Welcome new and old customers to contact us to establish future business relationships and create brilliant future!
Our Advantage
1. Our company mainly sells Chinese brand heavy truck parts, including engine parts, gearbox parts, clutch parts, chassis parts, brake parts and various body parts and various related truck parts.
2. We can also sell heavy-duty trucks, light-duty trucks and special vehicles of Chinese brands, such as asphalt spray trucks, water tankers, oil tankers and crane trucks.
3. Sales of excavators, bulldozers, loaders, forklifts and other construction machinery.
4. We have reliable freight forwarders. Every month we have many 20ft and 40ft containers to deliver. We can get great prices for our shipping agents that will help you save a lot of money while keeping your cargo safe.
5. Ensure product quality and good after-sales service.
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FAQ
Q1. What is your terms of packing?
A: Generally, we pack our goods in neutral white boxes and brown cartons. If you have legally registered patent, we can pack the goods in your branded boxes after getting your authorization letters.

Q2. What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We’ll show you the photos of the products and packages 
before you pay the balance.

Q3. What is your terms of delivery?
A: EXW, FOB, CFR, CIF, DDU.

Q4. How about your delivery time?
A: Generally, it will take 30 to 60 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.

Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.

Q6. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and the courier cost.

Q7. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery

Q8: How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come fro

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Types of Axles

An axle is the central shaft of a rotating wheel or gear. It can be fixed to the wheels or to the vehicle itself. Depending on the design, it may be fixed in different positions and have different types of mounting points. It may also have bearings. Axles come in different types and shapes. Some of them are more functional than others, and they may be semi-floating, tandem-drive, or lift axles.

Customized axles work best for cars

Adding big horsepower to a car can increase its performance, but this addition can also cause problems. It is important to take proper measurements for the rear axle to ensure it is not too long or too short. However, this measurement can become complicated with limited-slip differentials and offset pinions.
If you want to add custom axles to your car, it is important to know the physical properties of the axle and what kind of load it can handle. If you’re only planning to make a minor upgrade, it may be enough to get a standard axle. However, if you’re planning to make any major modifications, a customized axle will be a much better option.
Customized axles can be made of a variety of materials. They can be made of carbon steel or nickel steel. Some are made to float freely and others are made to be rigid. If you’re building a car, you should also consider the type of bearings and kingpins that it will use.
Axles come in a variety of types, based on the amount of force they produce. Some are pre-defined, while others are customized to meet your car’s specifications. The advantages of customizing your axles include improved wheel speed and torque. You can even adjust the angle of the axles for even more performance.
Axles can make or break your car’s performance. Customized axles are made with a proprietary alloy material that increases the torsional strength. Because of this, they are able to withstand a tremendous amount of power. Additionally, they are able to withstand lateral and bending loads.
While customizing your axle is an excellent idea, it is also very expensive. The best way to go about it is to work with a professional. They are able to make the axles you need and they’re usually well-made and made of quality materials. However, you should make sure you check the reviews and ratings of the manufacturer before making a purchase.
If you want to shorten the axle on your car, you should have it machined with new splines. The number of splines on an axle is important because it determines the strength of the axle. A 33-spline axle is more durable than a 28-spline axle, and a 40-spline axle is even stronger.

Semi-floating axles

Semi-floating rear axles are a common type of axle used in midsize trucks. They utilize a single wheel support bearing and use one axle shaft to transmit rotation to the wheels. A semi-floating axle is typically lubricated. Aftermarket kits are available to make the axle shaft stronger. However, these kits do not upgrade the axle differential assembly. Therefore, axles with weak differential assemblies may not benefit from conversion.
Semi-floating axles feature a “C-Clip” for holding the axle shaft in place in the axle casing. The problem with this design is that the axle shaft is exposed to more wear and tear. In addition, axle shafts with a C-Clip must be surface-hardened in the area where the axle shaft is flexed.
Semi-floating axles differ from full-floating axles in their appearance. A semi-floating axle has a hub that looks like the hub of a 3/4-ton 14-bolt Ford axle, whereas a full-floating axle’s hub looks like that of a 1 ton Ford axle.
Semi-floating axles have a tapered end. This makes them more efficient in carrying weight. In addition, they have a keyed end to prevent the rear hub from slipping around. This ensures the axle remains stable even when the rear wheels are turning. It is also important to note that semi-floating axles can only carry a small amount of weight, while full-floating axles can carry a lot of weight.
Semi-floating axles are lighter than full-float axles, which makes them less expensive to manufacture. Additionally, if one axle fails, the vehicle will continue to operate normally. Aside from this, semi-floating axles also have c-clips, which are the bearings that bear the weight of the vehicle.
A semi-floating axle is also available with an optional 5-lug hub. The axle shaft transmits rotational torque from the differential to the wheel, and the hub rides on tapered roller bearings. A full-floating axle assembly is stronger than a semi-floating axle system. In addition, it is compatible with factory 5-lug hubs.
Semi-floating axles are easier to install than full-floating axles. However, if you want to convert your semi-floating axle to a full-floating axle, you can install an aftermarket kit.

Tandem-drive axles

A tandem drive axle is a type of axle with two wheels on one side of the vehicle. Compared to a single axle with two wheels, a tandem drive axle is 60 pounds lighter and offers improved performance and durability. This type of axle is designed to optimize fleet uptime by balancing design efficiency and application-specific demands.
The suspension system of a tandem drive axle includes air springs that control the suspension of the lead and trailing axles. The air springs are pneumatically connected to a common reservoir. The springs’ displacements are averaged to provide a controlling input to the air spring pressurization controller.
A tandem drive axle may be used to transport heavier loads. It is important to note that the maximum weight of a tandem drive axle may be different in different states. In general, the federal regulations allow up to 34K pounds per axle, but the state regulations may be different. However, the weight limits of tandem axle groups are significantly lower than for single axles.
A tandem drive axle is a common type of vehicle drive axle. It is characterized by two axles spaced more than 40 inches apart. The distances are measured from the axle centers. A tandem-drive axle may be a drive axle or a steer axle. If the steer axle is overloaded, steering will be more difficult.
A tandem drive axle is a popular choice for commercial trucks. It is durable and can handle heavy loads. It is often used in cement mixing trucks and tanker trucks, where the weight of the load is distributed evenly between the two axles. The combination of the two axles helps a tandem drive truck make a smoother start from a stopped position. Because the weight is distributed across two axles, the torque generated by the engine can be distributed more effectively.
A tandem drive axle is usually paired with two air-lift axles. A tandem drive axle is also used when the weight of a cargo truck cannot be supported by the two air-lift axles. Tandem-drive axles are typically installed at the rear of a truck’s chassis.

Lift axles

Lift axles are a great way to reduce the workload on your powertrain, while also improving your fuel economy. These axles reduce rolling resistance, thrust, and tandem scrub, and can improve fuel economy by two to five percent. However, you should use lift axles with care, and pay special attention to suspension spacing.
Some lift axles have a steering feature, which allows the driver to control when the axle is raised, which is useful for taking sharp corners. However, some drawbacks to non-steerable lift axles include excessive tire wear. Steerable lift axles can alleviate this problem, but they are generally more expensive.
Another benefit of lift axles is that they increase a vehicle’s weight carrying capacity. This is useful for trucks with large load capacities. Although state laws vary, federal regulations are generally in favor of spreading the weight of a truck’s cargo across several axles. This helps protect large road pavements and bridges.
Lift axles are an important feature of dump trucks and should be considered if you’re considering making a change. However, they can be costly, and it’s important to consider the costs and benefits before deciding on a new configuration. These axles are best used when the load capacity of a truck is more than double what it is capable of carrying.
The developed algorithm has been tested under various scenarios. First, the algorithm accepts the command from the driver to lift axles. However, it ignores the tag axle dropping command if the vehicle is traveling more than 30 kph. Second, the vehicle stops for about 60 seconds. Once loaded, the algorithm drops the axles in order.
Besides enhancing the weight carrying capacity of a truck, lift axles are also used for auxiliary purposes. Most of these axles are used on dump trucks. In addition to the pusher axle, some dump trucks have a tag axle, which increases the distance between the steer axle and rearmost axle. This allows the truck to carry more cargo than the pusher axle.

editor by czh