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521 Series Tapered Roller Bearings — Sizes & Specifications

8 models in the 521 series, 170–317.5 mm bore. Every row links to the full specification page and to the cross-reference page of that model.

ModelBrandBore d (mm)OD D (mm)Width B (mm)
52134ANDGE170280150—
52136ANDGE180300160—
52138ANDGE190320170—
52140ANDGE200340184—
52144ANDGE220370195—
52148ANDGE240400210—
52152ANDGE260440225—
521316/C9ANDGE317.5422.275269.875—

About the 521 series

521 series bearings follow the ISO dimension plan for this family, so a given number is dimensionally interchangeable between brands - see the cross-reference to confirm. Choose the suffix for your duty: shields for dry, clean positions, contact seals for wet or dusty ones, and a larger clearance class where the fit or temperature demands it.

Other Tapered Roller Bearings series: EE · HM · LM · M · 320 · BT · 322 · L