Our 6900 ceramic silicon nitride ball bearings are high-performance components that offer exceptional durability and efficiency in various industries, including cycling, RC models, automotive, aerospace, and precision machinery. These bearings are part of the 6900 series and feature a construction using silicon nitride ceramic material, known for its outstanding properties.

The size 6900 designation indicates the bearing's dimensions, with an inner diameter of 10 millimeters, an outer diameter of 22 millimeters, and a width of 6 millimeters. This compact size makes them suitable for applications where space is limited, while still providing robust performance.

Ceramic silicon nitride ball bearings provide several advantages over traditional steel bearings. Silicon nitride ceramic material offers superior hardness, reduced friction, excellent wear resistance, and resistance to corrosion and high temperatures.

One of the primary benefits of 6900 ceramic silicon nitride ball bearings is their reduced friction coefficient. Ceramic balls have a smoother surface and lower density than steel balls, resulting in reduced friction during rotation. This leads to improved efficiency, lower energy consumption, and reduced heat generation, making them ideal for high-speed applications.

Furthermore, the silicon nitride ceramic material used in these bearings provides exceptional hardness and wear resistance. This allows the bearings to withstand heavy loads, impacts, and abrasive conditions without premature wear or damage. The increased durability of ceramic silicon nitride ball bearings translates into extended service life, reduced maintenance requirements, and cost savings for industries.

Ceramic silicon nitride ball bearings also exhibit excellent corrosion resistance. They can withstand exposure to moisture, chemicals, and harsh environments without compromising their performance or structural integrity. This corrosion resistance ensures reliable operation in challenging conditions and contributes to the longevity of the bearings.

ACER Racing's size 6900 ceramic silicon nitride ball bearings offer exceptional performance and durability due to their silicon nitride ceramic construction. These bearings provide reduced friction, improved efficiency, enhanced wear resistance, and corrosion resistance. Whether used in automotive, aerospace, or precision machinery applications, 6900 ceramic silicon nitride ball bearings continue to deliver reliable and efficient performance in demanding operating conditions.

12x21MM Ceramic Engine Bearing | 6801 Ceramic Engine Bearing

12x21MM Ceramic Engine Bearing | 6801 Ceramic Engine Bearing

$59.99 $17.99 Save $42.00

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12x21mm Ceramic Engine Bearing

If you need 7x17mm ceramic engine bearings please click HERE

Welcome to ACER Racing's new line of Ceramic Ball Bearings made for competition use in high performance RC car engines. These are from our Ceramic Nitride Pro Series line of world champion bearings. These 12x21x5mm ceramic engine ball bearings feature our diamond polished Silicon Nitride ceramic balls plus a super high speed PEEK inner cage to withstand the heat and stress of your engine. Proprietary internal tolerances have been incorporated into this ceramic bearing as well. New generation PEEK polymer was chosen for the cages because of its superior combination of strength and flexibility, high operating temperatures, and high chemical and wear resistance. The design of the cage and material used are of paramount importance for the performance of the cage as well as for the operational reliability of the bearing itself. Ball Bearing cages are mechanically stressed by friction, strain and inertia. They may also be subjected to the chemical action of certain lubricants, lubricant additives or products of their ageing or organic solvents. The relative importance of these considerations can be affected by other operational parameters such as elevated temperatures, shock loads, vibrations or combinations of these and other conditions. The materials from which the bearing components are made determine to a large extent the performance and reliability of the rolling bearings. This why ACER Racing has used PEEK cages for our ceramic engine bearings. PEEK cages have an excellent combination of strength and elasticity. The good sliding properties of the polymer on lubricated steel surfaces and the smoothness of the cage surfaces in contact with the rolling elements produce the lowest amount of friction so that heat generation and wear in the bearing are at a minimum. The low density of the material means that the inertia of the cage is small contributing to greater speed. The excellent running properties of polymer cages under lubricant starvation conditions permit continued operation of the bearing for some time without risk of seizure and secondary damage. Our PEEK bearing cages show no signs of aging by temperature and oil additives up to +200 °C (392°F). Price is for one ball bearing. NOTE: For 12x21mm ball bearings that will NOT be used in RC car engines, please use ACER Racing part C020.

8 piece Ceramic 627 Inline Skate Bearings Kit | 627 Bearing Kit

$94.99 $35.99 Save $59.00

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NOTE: These bearings are ABEC7 size 627 2RS bearings for 7mm axles NOT 608 bearings for 8mm axles. The inner diameter is 7mm which some skates use please check your particular skates to see if this is what you need. If not, we also sell 608 ceramic skate bearings which are for standard 8mm axles with an inner diameter of 8mm. For skaters looking to upgrade from their Fafnir 37K 8 ball bearings these are the best choice.

With our National and World Champion reputation in the high performance ball bearing industry we set out to engineer the best ceramic skate bearing at any price. First we started with our tried and tested Ceramic Nitride Pro Series silicon nitride balls (Si3N4). The same super hard balls that gave us the reputation as "the hardest balls in the industry." These balls are matched for consistent concentricity per set. They are polished using diamonds for a super smooth and shiny finish. Their durability is unmatched by any other ball or material in the industry. With a melting temperature of 2552 degrees F and the best modulus of elasticity in the world, these are the best balls period. We use a special synthetic lubrication in our ceramic skate bearings which has an extremely wide service temperature range of from -50 to +120 degrees Celsius with an incredible speed factor of 1 million. We integrate our HSR inner ball bearing cage for durability and strength with superior heat resistance at high RPMs. This insures that your ceramic skate bearings will spin faster, longer. We seal our ACER SK8 ceramic skate bearings with two no contact grey seals which will resist the elements while allowing simple removal for easy cleaning when necessary. Each bearing is laser etched with our trademark "CERAMIC NITRIDE PRO SERIES" logo to insure that you are receiving the original ACER SK8 ceramic skate ball bearings. These are the best ceramic skate bearings at any price. Whether used in your skateboard, inline skates, roller skates or anywhere a size 627 size 7x22x7mm ball bearing is used, rest assured you will be running the finest ball bearings in the industry.

3 Racing Sakura X1 Sport Ceramic Ball Bearing Kit

Team XRAY X4 Ceramic Bearing Kit

$119.99 $89.99 Save $30.00

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Ceramic Ball Bearing Kit for the Team XRAY X4 (including 2024 version & X4F). Race faster and longer with our World Champion Ceramic Bearing Kit. HSR inner cage technology for durable high speed operation, SIN 100% synthetic oil (not heavy grease) for super fast, cool and quiet operation, and our world famous Ceramic Nitride Pro Series for the ultimate in low friction, lightweight, and blistering fast speeds. We also offer a complete set of aerospace grade titanium turnbuckles for the X4.

Kit is complete with all the following bearings in ceramic:

10x15mm 4 pcs

3x8mm 2 pcs

5x8mm 4 pcs

4x7mm 2 pcs

6x10mm 8 pcs

3x6mm 5 pcs

Our ceramic bearing for the Team XRAY X4 are a super high-performance upgrade for your RC car. They are made with high-quality precision diamond polished ceramic balls which provide much lower friction and better durability than standard steel bearings. This leads to improved performance, lower heat, better acceleration & top speed and longer bearing life.

The Team XRAY X4 ball bearings are also sealed, which helps to keep out dirt and dust. This can help to prevent premature wear and tear on the bearings. The bearings are also pre-lubricated with our high-quality synthetic lube, which helps to keep them running smoothly.

The Team XRAY X4 ball bearings are a great upgrade for any RC car enthusiast. They can help to improve your car's performance and extend the life of your bearings. If you are looking for a high-quality upgrade for your RC car, then the Team XRAY X4 ball bearings are a great option.

Here are some of the benefits of using Team XRAY X4 ball bearings:

Lower friction: Ceramic bearings have a lower coefficient of friction than steel bearings. This means that they can spin more easily, which can lead to improved performance.
Better durability: Ceramic bearings are more durable than steel bearings. This is because they are less susceptible to wear and tear from dirt, dust, and other contaminants.
Sealed bearings: The Team XRAY X4 ball bearings are sealed, which helps to keep out dirt and dust. This can help to prevent premature wear and tear on the bearings.
Pre-lubricated: The Team XRAY X4 ball bearings are pre-lubricated with our high-quality synthetic lubricant. This helps to keep the bearings running smoothly.