... and double row taper roller bearing Sizes and sphere of our tapered roller bearing production: Single row taper roller bearing series:1) Single row ... ) Single row, with flanged outer rings Double row tapered roller bearing series:1) Double-row, inch series & metric series2) ... the world.Series:Metric series, inch series, ISO series, non-standard series and diameter according to Timken, FAG, SKF,NTN, ...