8 × 12 × 10 mm. HK 0810 INA is a drawn-cup needle roller bearing with open ends. Its compact cross-section provides high radial load carrying capacity and stiffness; it is not intended to support axial load. The bearing has no separate inner ring, so a suitably hardened and ground shaft surface normally forms the raceway. Correct shaft quality, housing fit and lubrication are essential for service life.