Chain drive rear axle

Types of chain drive rear axle

A chain drive rear axle is a type of drivetrain commonly used on motorcycles, bicycles, and some off-road vehicles. Compared to other rear axle types like the shaft and belt, the chain drive rear axle is preferred because of its efficiency, simplicity, and lightweight nature. It is also flexible and offers a wide range of gear ratios.

The chain drive rear axle consists of a steel chain looped around two sprockets. One sprocket is connected to the engine via a shaft or pedals, while the other is connected to the wheels. When the driver/operator pushes the pedals or turns the shaft, the chain moves over the sprockets, driving the wheels and propelling the vehicle forward. Because of its complex nature, the chain drive rear axle is not very common in modern-day vehicles.

The chain drive rear axle is common in high-performance and specialized vehicles, including sports cars and motorcycles. This is mainly because the system offers a high-torque transmission, making it suitable for applications requiring high-speed and high-torque output. Below are the different types of chain drive rear axles:

• Single-sided swingarm:

  The single-sided swingarm is a type of motorcycle rear axle system in which the rear wheel is supported on one side by a swingarm. This design simplifies wheel removal and maintenance, making it popular among high-performance and racing motorcycles. The single-sided swingarm chain drive rear axle improves aerodynamics and reduces overall vehicle weight.

• Double-sided swingarm:

  The double-sided swingarm is another type of motorcycle rear axle system. In this design, the rear wheel is supported by two swingarms, one on each side. This design offers more stability and strength, making it suitable for off-road and touring motorcycles. The double-sided swingarm is more common than its single-sided counterpart.

• Monoshock rear axle:

  The monoshock rear axle is a type of motorcycle rear axle system in which the rear wheel is connected to the main frame through a single shock absorber. This design improves the motorcycle's handling and stability, especially on rough terrain. The monoshock rear axle system is mainly used in off-road and sports bikes.

• Chain and sprocket rear axle:

  The chain and sprocket rear axle is a common type of bicycle rear axle system. In this system, a chain loops over two sprockets (the chainrings and cassette) to transfer pedal power to the wheels. This design is simple and efficient, making bicycles easy to use and maintain. The chain and sprocket system is available in different gear ratios to suit various riding styles and terrains.

Specifications and Maintenance of Chain Drive Rear Axle

Chain drive rear axles come in different specifications to meet the requirements of various vehicle applications. Here are some general specifications to consider:

• Axle ratio

  The ratio of the number of teeth on the chain drive rear axle sprockets is called the axle ratio. It affects the vehicle's performance. For example, a higher axle ratio is suitable for off-road or towing applications because it offers more torque. On the other hand, a lower axle ratio favors high-speed applications.

• Load capacity

  Each chain drive rear axle is designed to handle a specific load. This is the maximum weight that the axle can support without experiencing damage or failure. Different vehicle models have varying load capacity requirements.

• Wheel bolt pattern

  The wheel bolt pattern is the number of bolts and the arrangement on the wheel hub. It is important that the chain drive rear axle's bolt pattern matches that of the vehicle to ensure proper wheel attachment.

• Differential type

  Some chain drive rear axles come with locking differentials. This is suitable for off-road and low-traction environments. The differential allows wheels to rotate at different speeds to enhance cornering on paved roads.

• Brake compatibility

  When selecting a chain drive rear axle, buyers should ensure that it is compatible with the braking system used in a given vehicle. For instance, the axle should have provisions for brake disc or drum attachment.

• Material and construction

  Axles are usually made from steel, although some high-performance models may use aluminum or composite materials. The chain drive rear axle's construction affects its strength, durability, and suitability for different applications.

Follow these tips to maintain chain drive rear axles and avoid failures:

• Regular inspection: Inspect the chain drive rear axle for damage and wear. Check the chain for proper tension, links, and wear. Also, check the sprockets for wear and damage.
• Proper lubrication: Lubricate the chain to reduce friction and wear. Do not over-lubricate because this may attract dirt and debris.
• Seal and gasket inspection: Check the seal and gaskets for wear, damage, or leaks and replace them if necessary. Ensure that the seals and gaskets are properly installed to prevent oil leaks.
• Regular oil change: Drain the old oil from the differential housing and fill it with new oil. Follow the manufacturer's recommendations for the type of oil to use in the differential.
• Proper wheel alignment: Ensure that the wheels are properly aligned to prevent uneven wear on the chain drive rear axle components. Check the wheel alignment using a wheel alignment tool and adjust the axle's alignment if necessary.

How to choose chain drive rear axle

When purchasing 4x4 chain drive rear axle for sale, business buyers should consider the following factors:

• Purpose

  Buyers should know the project purpose before purchasing the chain drive rear axle. Is it for off-road purposes or on-road vehicles? Different purposes will require different axle specifications.

• Vehicle Compatibility

  Business buyers should ensure that the axle they choose will be compatible with the vehicle it will be used in. To ensure compatibility, buyers should consider the vehicle's make, model, and year.

• Axle Ratio

  The axle ratio is important to consider when choosing a chain drive rear axle. Buyers should know that the axle ratio will influence torque and acceleration. A chain drive rear axle with a low ratio will offer more torque, while a rear axle with a high ratio will provide better fuel efficiency.

• Budget

  Business buyers should set a budget for the chain drive rear axle purchase. It is advisable to have a budget before purchasing to avoid overspending. Also, with a set budget, buyers can shop around and get a chain drive rear axle that will be within their financial reach.

• Quality

  For 4x4 chain drive rear axle buyers, quality is an important factor to consider. Business buyers should go for axles that are of high quality and from reputable manufacturers. High-quality rear axles will offer buyers durability and reliability.

• Installation

  Buyers should consider the ease of installing the chain drive rear axle. To avoid extra costs, it is advisable to purchase an axle that is easy to install. Additionally, business buyers can choose a chain drive rear axle that is compatible with their mechanics or workshop, thus eliminating the need to look for a new installer.

How to DIY and Replace Chain Drive Rear Axle

Here's a basic guide on how to replace a chain drive rear axle:

• Preparation

  Ensure the bike is on a stable, level surface. Gather all necessary tools: new rear axle assembly, jack stands, safety jack, adjustable wrench, torque wrench, socket set, and possibly a hammer. Wear safety glasses and gloves for protection.

• Remove the rear wheel

  Use the wrench to loosen and remove the nuts or bolts securing the rear wheel. Then, use the bike jack to raise the motorcycle, providing enough clearance to remove the rear wheel. Slide the bike's jack under the frame and secure it. Start loosening the nuts or bolts and spin them off until loose. Grab the wheel and pull it back to the swing arm. The wheel will detach from the bike once the nuts or bolts are completely spun off.

• Remove the old axle

  Once the rear wheel is removed, the axle will be visible. Use a wrench or socket to remove the nuts or bolts securing the axle. The brake caliper and chain tensioners may also be removed to allow the axle to slide out.

• Install the new axle

  Slide the new axle through the swing arm and into the wheel hub. Ensure it is properly seated and aligned. Replace the washers and nuts or bolts, and tighten them securely. Reinstall the brake caliper and chain tensioners.

• Reattach the rear wheel

  Slide the rear wheel back into place, ensuring proper alignment with the chain and brake disc. Pull the wheel forward until it makes contact with the swing arm. Then, tighten the chain tensioner bolts to secure the axle's position.

• Final adjustments

  Lower the bike from the jack stands. Check the chain tension and adjust it if necessary. Spin the rear wheel manually to ensure it rotates smoothly and without interference. Double-check all nuts, bolts, and adjustments before riding the bike again.

Q&A

Q1: What is a chain drive rear axle?

A1: A chain drive rear axle is a type of rear axle commonly used in chain-driven vehicles such as motorcycles and some bicycles. Instead of using a shaft to transmit power from the engine to the wheels, this system uses a chain similar to that of a bicycle.

Q2: What are the benefits of a chain drive rear axle?

A2: Chain drive rear axles offer several advantages: they are lighter, more efficient, and easier to maintain than other drive systems like shaft drives or belt drives. They provide direct power transfer, which can be more responsive and quicker. This is especially beneficial for sports and racing applications where performance is critical.

Q3: Where are chain drive rear axles used?

A3: While common in motorcycles and bicycles, chain drive rear axles can also be found in ATVs, some 4WD vehicles, and even in certain industrial machinery and construction equipment. Anywhere precise, efficient power transfer in a lightweight, low-maintenance package is required, a chain drive rear axle can be the solution.

Q4: How to maintain a chain drive rear axle?

A4: Maintaining a chain drive rear axle is crucial to its longevity and performance. Regular lubrication of the chain is essential to reduce friction and prevent wear. Use a suitable chain lube to keep the chain running smoothly. It's also important to periodically inspect the chain for signs of wear or damage, such as stretched links or broken pitches. Replace the chain when needed to maintain optimal performance.

A5: Another crucial maintenance aspect is ensuring proper tension of the chain. A properly tensioned chain ensures efficient power transfer and reduces the risk of axle failure. Follow the manufacturer's guidelines for appropriate tension.