Rear axle bearing Ø 40 mm / Ø 50 mm C5 - Karting

The Rear axle bearing C5 is an essential mechanical part to support and allow the fluid rotation of therear axle On a karting chassis (OK, OKJ, KZ, etc.). In Inner diameter 40 mm or 50 mm Depending on the axle used, this bearing is mounted in the bearing support (cassette or carrying carrier) and ensures a smooth and efficient transmission of the movement of the back shaft.

Rear axle bearing function

The axle bearing allows theback tree to run freely While ensuring the centering and maintenance of the rear train. On a competitive kart, the quality and accuracy of the bearing influence directly:

• the Fluidity of rotation of the axle

• the reduction of friction losses

• Engine response and peak speed

• constancy performance on several laps

Diameters available

Bearing Ø 40 mm

• Suitable for chassis using a rear axis of 40 mm inner diameter

• Frequent use on specific brands and configurations

• External dimensions and width dependent on the model (eg 40 × 80 mm)

Bearing Ø 50 mm

• Standard bearing for Rear axle Ø 50 mm, widely used on the majority of competition chassis

• Typical dimensions: Ø 50 × 80 mm with game and tolerances adapted to karting

These two sizes cover most of the needs of modern chassis.

Internal game C5 - What does it mean?

Suffix C5 designates the internal radial game Bearing, that is, the space between the inner and outdoor rings. A rolling in play C5 present:

• one more important internal game than normal

• a tolerance thought to support:

  • the high vibrations

  • the frequent operating temperatures

  • Thermal and dynamic variations related to the competition

On karting chassis, these upper internal games allow the bearing to operate more "freely" without excessive clamping when the rear train heats, thus reducing the risk of blocking or premature wear.

Types of rear axle bearings

The bearings can be offered with different characteristics according to your needs:

Steel bearings with shielding

• Metal shield or integrated joints for Protection against dust and dirt

• Good compromise sustainability / cost

• Simple installation in a cassette or carrier

Ceramic or hybrid bearings

• Ceramic balls or hybrid components for a Increased resistance and reduced friction

• More durable and more fluid, offering a slightly higher performance

• Ideal for sharp competition

Installation and compatibility

• These bearings are designed to be mounted in the Cassette or rear carrier chassis

• They are compatible with most competition chassis, both for configurations CADET / JUNIOR / SENIOR / KZ only for trains full of karting

• The assembly is generally done by mechanical insertion or using an appropriate press, with precise alignment of the bearing

Important : A bad assembly or incorrect lubrication can cause premature wear or faults.

Benefits of a C5 bearing for karting

• Fluid rotation of the rear axle

• Better tolerance to vibration and dynamic charges

• Reliable operation even at high temperatures

• Reduction of friction points in transmission

• Option possible in ceramic version for increased performance

Maintenance tips

• Regularly check the status of joints and shielding

• Clean and lubricate if possible according to rolling type

• Check the wear gauges and replace if excessive game or abnormal noise

• Entrust the installation to a professional if you are not experienced

MagickArt Council

A quality rear bearing is essential for a optimal engine behavior, especially on efficient or competitive chassis. Choose the right size (40 mm or 50 mm) and the right game (C5 for demanding environment) guarantees higher stability and durability.