This needle roller bearing carries a drawn cup with open ends, manufactured to DIN 618/ISO 3245. The outside diameter is 26.0 mm and the width is 12.0 mm, with a net mass of 13.99 g. The limiting speed is rated at 12700 1/min, while the reference speed reaches 9700 1/min. The bearing is supplied without sealing, so lubricant access from both sides must be provided by the surrounding housing design, and protection against contamination has to be arranged externally. The open-end drawn cup construction keeps radial section height low while offering a defined outside diameter and width for direct housing fit, making the HK2012-B suitable where axial space is limited and where the mating shaft acts as the inner raceway.