The QWA series bearing consists of two ring seats — an inner ring and an outer ring with integral external teeth — along with a single row of steel balls and spacers. The raceways are precision-machined so that each ball maintains contact with the raceways at four distinct points. This four-point contact geometry allows the bearing to simultaneously support axial loads (in both directions), radial loads, and tilting moments – all within a single row of rolling elements.

The external gear is machined directly on the outer ring, enabling direct pinion drive coupling. This simplifies the transmission system, reduces component count, and facilitates a more compact overall design. The series follows a naming convention where "QW" denotes external teeth, and the subsequent numbers indicate key dimensional parameters such as pitch circle diameter and ball diameter. For example, a typical designation like QWA.355.20A indicates external teeth, a 355mm track center diameter, 20mm ball diameter, with "A" indicating a larger gear module option.

Performance Highlights

• Combined load capability: Handles axial, radial, and moment loads simultaneously

• Compact and lightweight: Single-row design saves space and reduces structural weight

• Good rigidity: Optimized raceway geometry provides stable operation under load

• Versatile size range: Available in a broad spectrum of diameters to suit various equipment requirements.