TRB RC 4x9x4mm non-flanged Precision High Speed Hybrid Ceramic Motor Ball Bearings.Fits 380 Size Motors Using 4 x 9 x 4mm Ball Bearings such as Traxxas 380 VelineonFeatures:Chromium Steel 52100 (GCr15) RacesCeramic Si3N4 BallsIncludes: 2 Hybrid Ceramic Ball Bearings 4x9x4mmAlways Verify Your Size Ball Bearings Due to Manufacture Model Updates. The Characteristic of Ceramic BallsCompared 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.
H**.
All tick, all the time.
They seem to be running smooth, but are nearly as noisy as the 20+ year old bearings they replaced.
K**S
Five Stars
worked ok
Trustpilot
3 days ago
2 days ago
