Compared with the single row angular contact ball bearings, double row NTN bearings 5207NTR have better rigidity, can sustain the overturning moment. And the type of bearing is separate, especially suitable for high rigid situations, like widely used in car wheel hub, oil pump, roots blower, air compressor, injection pump and various gearbox, etc.

Here, datasheet of NTN bearings 5207NR are listed as follows, 

   

Metric series 4T-32307 tapered roller bearings dimensions are standardized according to ISO / JISB1512 standards, so they features energy savings, higher output, longer life, higher speed and more efficient assembly specifications. Further more, the type of bearings are very sell successful to Middle East, East Europe, and Latin America customers.

NTN bearings 4T-32307 technical data are shown as follows, for reference

       
d: 35 mm
D: 80 mm
B: 31 mm
M: 0.787 kg
Basic dynamic load rating: ...

UC design UC206-103 is a widespread NTN pillow block bearing, which combination of a plumber block, an automatic self-aligning bearing, seal and a housing of high grade cast iron which comes in to various shapes. And the type of pillow block bearing are especially  popular used in crushing equipment, automatic spray gun, washing equipment, dairy machinery, crane, vacuum pump, injection molding machine, sanding machine, etc.

For reference, NTN bearings unit technical data are shown as below, ...