The 674 Open is a precision-engineered, single-row miniature ball bearing designed for applications where absolute minimal rotational resistance and maximum speed are the primary requirements. By removing the physical barriers of shields or seals, this 4x7x2.5 mm component allows for unrestricted lubrication flow and zero "drag," making it perfect for high-frequency vibration tools and precision instruments. With a featherweight mass of just 0.3 grams, the 674 open type excels in energy-sensitive systems where reducing mechanical friction is critical to extending battery life and improving motor response.