6001RS QCP Bearings

What Does ABEC 3 Mean?
ABEC ratings are standards which require each bearing to pass many tests in order to meet the scheduled requirements. This includes noise testing at high RPM, extremely tight tolerances for the internal diameter, outer diameter, roundness of ball, trueness of races, and surface finish of all of the above. The ABEC 3 rating is a good rating for use in bicycles. The ABEC standards increase as the number goes up. In other words, ABEC 5 is a higher standard than ABEC 3, even though only differing by 2 digits in rating.

The Balls are made from chromium steel. These high precision Grade 10 balls are 10/1,000,000” from exactly round in sphericity. For comparison, Shimano and Campagnolo use grade 25 balls in their top-level components. When talking ball grade, the smaller the number, the "rounder" the ball.

The Races are vacuum de-gassed 52100 high carbon chromium alloy steel, hardened to Rockwell C-62.

The Retainers are riveted steel for superior strength.

• Dimensions - 12mm x 28mm x 8mm
• Seals - LLB
• Ball Material - Chromium Steel
• Ball Grade - 10
• Races - Chromium Steel
• Application - Wheel Hub
• Grease - Mobile HP 222