HK series is designed to handle heavy loads and has high-strength Conrad separator options that can manage severe loads and speeds.

HD series features an innovative fractured outer ring design that allows for maximum ball complement in a radial deep-groove bearing. This provides significant improvements in dynamic load capacity and predicted service life.

HA series has a non-separable design with counter-bored outer rings and one-piece, high strength separators. Ideal for preloaded and/or thrust-type applications.

Options include deep-groove outer and relieved inner races for ultra-high-speed applications.

HT series is a high-performance line featuring full deep-groove outer rings, one-piece, high strength separators and two extra-deep-groove inner ring halves. Ideal for use on high-speed shafts with reversing thrust loads.