AST AST50 56IB40 plain bearings
What 90 mm d is the ABEC 1 (ISO Class Normal) precision rating: best place to buy AST AST50 56IB40 plain bearings online? 190 mm D Manufacturing Service . d 90 mm precision rating: ABEC 1 (ISO Class Normal) D 190 mm finish/coating: Uncoated B 43 mm cage material: Steel bore type: Round outer ring