The 675 Open is an ultra-miniature, single-row ball bearing designed for high-precision applications where minimal starting torque and maximum rotational velocity are paramount. Without the added friction of seals or shields, this 5x8x2.5 mm component offers an unobstructed path for lubrication, making it ideal for systems utilizing oil mist or oil bath lubrication. With a total weight of only 0.4 grams, the 675 open type is the preferred choice for high-speed spindles, precision measuring instruments, and vacuum environments where seal outgassing or drag must be strictly avoided.