SKF 6302 TN9 / C4 bearing

The SKF 6302 TN9 / C4 bearing (15 x 42 x 13 mm) pushes the technicality even further than version C3. It keeps the high performance polyamide cage (Tn9) that reduces friction and weight, but adopts a radial internal game C4 (more important than the C3). This specification is particularly popular with the motorists for the balancing and transmission shafts subjected to very strong thermal expansions or for the motor blocks whose machining requires maximum freedom of rotation.

Full description: Why choose the game C4?

In the world of high level karting, the game C4 offers specific benefits:

  1. Freedom of total rotation: The game C4 is more "loose" cold. Once the engine is at its maximum operating temperature (in full finish by 35 ° C outside), the components are dilated and the bearing then reaches its perfect operation tolerance, without any clamping.

  2. TN9 anti-friction cage: The polymerized polymer cage reduces the inertia of the masses in motion. It allows brighter accelerations of low engine.

  3. Reduction of warm up: By offering more ball space, the C4 game limits the internal heating of the bearing itself, thus prolonging the life of the lubrication (oil film).

  4. Reliability SKF Explorer: Designed for the harshest conditions, this bearing is the guarantor of a sandy that does not "force" ever.


? Michel's trick

"The C4 is for the engines that work hard! Do not be surprised: cold, if you move the tree by hand, you will feel a little more game than with a C3. It's quite normal! It's this game that saves your engine when everything is Burning on the track. My advice: It's the ideal turnover if you often ride in summer or on very demanding circuits for sanding. And as for the TN9 / C3, we forget the hammer! We heal the crankcase, we take out the rolling of the fee, and It must slip like dad in mom!"


? Tuto: assembly and recommendations

  1. Installation temperature: Heat the motor housing around 80 ° C - 90 ° C. The bearing, ideally stored in expenses, must fall to the bottom of its resistance housing.

  2. Lubrication: Never turn this dry bearing to "see how it turns". The C4 game requires the presence of an oil film (XPS Gear Oil) to work properly.

  3. Control: During your revisions, check that the TN9 cage does not have a traces of abnormal coloration (excessive browning), a sign of overheating due to a lack of box oil.

  4. Pairing: If you climb a C4 on a tree end, try keeping the same game class on the other level of the shaft for a perfect expansion symmetry.


✅ Features

  • Brand: SKF

  • Type: 6302

  • Dimensions: 15 mm (Int.) X 42 mm (ext.) X 13 mm (Ep.)

  • Specificities: Cage TN9 (polyamide) / Game C4 (Extra Large)

  • Compatibility: Rotax 125 Max, Junior, Senior, Master, Evo, DD2.

Note Magickart: Sold individually. This is the ultimate solution for mechanics to completely free the internal mechanical constraints.

  • Reference
    SKF6302.TN9C4

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