ABEC 3 MAX radial double row bearing with 17 mm inner diameter, 30 mm outer diameter, 10/13 mm thickness with increased one sided inner edge and double-lip type sealing with strong contact, making a labyrinth seal.
ABEC 3 bearings use grade 10 Chromium Steel Balls and 52100 High Carbon Chromium Alloy Races.
The high precision balls are within 10/1.000.000″ round, twice as round as the industry standard, at it's highest level.
The alloy races are made from a vacuum de-gassed process for the purest chromium alloy steel, hardened to R-62, extremely tough and very durable. Polished to a mirror finish for ABEC-3 precision and noiseless movement. The riveted Steel Retainer stands for toughness, ABEC-3 tolerances and noise tested.
Manufacturer item code: 3903 LLU-E
Weight supplement: manufacturer spec