The H7003C-2RZ HQ1 is an ultra-precision hybrid angular contact ball bearing engineered for extreme high-speed machinery where rotational accuracy and thermal stability are critical. By combining premium high-carbon chrome steel rings with aerospace-grade Silicon Nitride (Si3N4) ceramic balls, this bearing achieves a staggering grease-lubricated limiting speed of 73,800 RPM. The 17mm bore and 35mm outside diameter make it the standard choice for high-frequency electric spindles, dental handpieces, and micro-machining centers. Ceramic balls are 40% less dense than steel, which virtually eliminates centrifugal ball loading and drastically reduces internal heat generation at extreme velocities. Certified to P4/HQ1 precision standards, this 40-gram bearing offers the ultimate combination of speed, durability, and electrical insulation.
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