1. Product Overview B65-27 non-standard single-row open deep groove ball bearing, overall dimension 65mm inner bore × 100mm outer diameter × 17mm width, dedicated for CVT primary pulley assembly. Open design without rubber seals, equipped with stamped low-carbon steel cage and C0 standard internal clearance. It bears heavy radial load and slight bidirectional axial load, running stably and low-noise under long-time high-speed variable vibration and high-temperature transmissi