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The Ceramic ABEC 5 bearings have ceramic balls and steel races.
Balls:
Silicon Nitride Ceramic Si3N4 balls are made from pure Silicon Nitride material with extreme high density from uniform compaction, the micro-structural development of this material during manufacturing is second to none. These high precision grade 5, Si3n4 pure ceramic balls are 5/1,000,000″ from exactly round in sphericity, 60% lighter weight, and 7 times harder than steel.
The balls are Grade 3, Silicon Nitride (Si3n4). These are the roundest balls you can buy without a military license.
Seals:
We use Silicone VV seals, which is the lightest drag seal available on the market. VV Seals: two NBR 70 rubber seals with non-contact type seal, which rides in a matching groove machined into the bearing.
