Cross roller bearings, turntable bearings and harmonic reducer bearings

Cross roller bearing In the cross cylindrical roller bearing, the cylindrical rollers are arranged in two 90 ° V-shaped raceways in a 90 ° included angle of 1:1, and the cylindrical rollers are separated by spacer blocks. This structure enables a set of bearings to bear radial load, axial load and overturning load at the same time. Turntable bearing In that turntable bear, a radial raceway of a thrust/centripetal L-shaped inn ring, a radial raceway of a thrust/centripetal seat ring and a group of centripetal cylindrical rollers form the radial part of the turntable bear, and an axial raceway of the thrust/centripetal L-shaped inner ring, two axial raceways of the thrust/centripetal seat ring, two groups of thrust cylindrical rollers and a retainer thereof form the axial part of the turntable bearing, The radial and axial combination structure of turntable bearing can bear radial load, bidirectional axial load and overturning moment. This series of bearings can be preloaded and achieve high rotation accuracy, so it is especially suitable for CNC rotary table, swing angle milling head, gear grinding machine table and other work occasions requiring high accuracy.