These Kartmaster ceramic hybrid axle bearings are a great choice for your racing kart. They fit 50mm axles and are sold individually. With a 50mm inner diameter and 80mm outer diameter, these bearings are built with top - notch components. The races are made of #52100 chrome steel, and they use Si3N4 ceramic balls. The injection - molded polyamide cage, rubber seals, C3 clearance, and P6 precision make them high - quality bearings. These SB - style insert bearings have an inner ring that's flush on one side. The Si3N4 ceramic balls are non - porous, non - magnetic, non - corrosive, and lighter than steel. They're also harder and spin faster with almost no friction. Compared to steel balls, Si3N4 silicon nitride balls offer superior performance. They're over 2x harder, 4x smoother, and about half the weight. They won't crack or micro - weld like steel balls, and they can polish the races as they roll. They're resistant to corrosion and won't pick up or micro - weld to particles in the bearing. They reduce friction, run at lower temperatures, vibrate less, and get smoother with use. Note that these ceramic hybrid bearings need a short break - in period to reach full efficiency.
Using these Kartmaster ceramic hybrid axle bearings is easy. First, make sure your kart's axle is 50mm in size as these bearings are designed to fit that specific dimension. Simply install them on the axle one by one since they're sold individually. During the initial use, remember that these bearings need a short break - in period. Don't expect to get the best performance right away; let them 'settle in' for a while to achieve full efficiency. For maintenance, keep an eye on the rubber seals. If they're damaged, replace them to prevent dirt from getting inside the bearing. Also, periodically check the races for any signs of pitting or damage. If you notice any issues, the Si3N4 ceramic balls will usually polish the races smooth again, but it's still a good idea to inspect regularly to ensure long - lasting performance.
