TRB RC 4x9x4mm Precision High Speed Hybrid Ceramic Motor Ball Bearings.
Compatible with 380 Size Motors Using 4 x 9 x 4mm Ball Bearings. Compatible with Traxxas 380 Velineon
Chromium Steel 52100 (GCr15) Races
Ceramic Si3N4 Balls
2 Hybrid Ceramic Ball Bearings 4x9x4mm
Always Verify Your Size Ball Bearings Due to Manufacture Model Updates.
The Characteristic of Ceramic Balls
Compared with steel, ceramic materials are noted for their better or particular characteristics, such as wear-resistance, corrosion resistance, high temperature resistance, electrical insulation (except SiC), non-magnetic, high strength, high rigidity, and low specific gravity. These properties qualify them for replacing steel to make bearings serve in conditions of higher speed, harsh environment and less lube, and decrease wear, noise, vibration and maintenance time of bearings, and eventually increase performance, reliability and life of bearings.