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What is a spindle hub?

What is a spindle hub?

The spindle is a critical component of the wheel hub spindle assembly in vehicles. The assembly supports the wheel, maintains stability while driving and enable smooth, efficient rotation. It combines several components into a single unit, making it simpler to install and maintain.

The spindle is a rod that extends from the suspension and connects the wheel hub. It supports the wheel hub assembly, transferring the load from the wheel to the suspension systems and to the chassis of the vehicle. The spindle should allow the wheel to rotate smoothly around its axis.

The wheel hub and spindle are of key importance in ensuring the smooth operation, movement and safety of HGVs.

What does a spindle hub do?

HGVS are large heavy vehicles requiring the highest quality components and exacting safety standards. A spindle hub has the critical task of providing a secure point for mounting wheels while allowing for controlled rotation. It acts as the intermediary between the wheels, tyres, brake systems and the vehicle’s suspension

The spindle hub needs to be strong and durable to withstand the significant forces generated during acceleration, braking and steering manoeuvres. The wheel hub spindle assembly is an essential component when it comes to delivering safe handling, reliability and optimal performance on the road.

What is the difference between a spindle and a hub?

Spindle and hub are often used interchangeably but they are in fact distinct components in HGV systems. The spindle is a cylindrical rod that enables rotation around its axis while bearing the load that is imposed on it. The hub is the protective enclosure that houses the bearing while providing a stable, convenient point for installation and maintenance. The spindle is required to efficiently transfer the load from the hub to the suspension system and the vehicle’s chassis.

A properly functioning wheel hub and spindle assembly ensures that wheels rotate smoothly, maintain correct alignment, and support the weight of the vehicle. It distributes forces during acceleration, cornering and braking, helping to create stable and controlled dynamics to support safe driving.

How do I know if my spindle hub is failing?

If a wheel hub and spindle assembly is failing, it’s important that the problem is identified and rectified as quickly as possible. This is because at the very least a failing wheel hub spindle assembly will mean a suboptimal performance and driving experience. At worst, the vehicle can become dangerous to drive, increasing the risk of accidents.

Some of the indicators of potential issues with a wheel hub and spindle include:

  • Unusual Noises

Sounds such as grinding, growling or squeaking, especially when making turns could point to issues with the spindle hub.

  • Loose Feel

If there is wobbling or excessive play in the wheel assembly it might be an indication that the wheel hub spindle assembly is compromised.

  • Uneven Tyre Wear

A giveaway sign of an alignment issue that stems from a malfunctioning spindle hub is uneven tyre wear patterns.

  • Reduced Braking Efficiency

If stopping distances appear to be extended or the driver experiences a pulsating brake pedal, it could indicate a problem with the spindle hub.

If you notice any of these issues you should immediately ensure your wheel hub and spindle assembly are investigated by a qualified mechanic.

What happens if a hub bearing fails?

A deteriorating hub bearing will lead to increased friction, generating excessive heat that accelerates wear and tear. Ultimately, this will result in a mechanical breakdown. This will compromise the ability of the wheel to rotate smoothly, jeopardising steering control and leading to a loss of vehicle stability. Over time, a failing hub bearing will cause damage to other components, such as the braking system, substantially increasing safety risks.

How much does it cost to replace a spindle hub?

The cost of replacing an HGV wheel hub spindle assembly will vary based on a range of factors. This will include the make and model of the vehicle, the quality of the replacement parts used, and any labour charges.  While choosing high-quality replacement parts requires more upfront expense, extended durability and performance makes them a cost-effective choice over time.

Expert wheel hub and spindle advice from CV Hubs & Bearings

CV Hubs & Bearings are the leading supplier of all things wheel hubs for HGV vehicles. We’re recognised experts when it comes to wheel hub assemblies and are always happy to answer questions and provide advice.

Whether you’re looking for high-quality parts, want to place an order or just in need of some advice, call +44 (0) 161 370 3344 or contact us online

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