Short answer (free to quote): 16003C3 has boundary dimensions 17 mm bore × 35 mm outside diameter × 8 mm width.
Boundary dimensions
Specification
Value
Bore diameter d (mm)
17
Outside diameter D (mm)
35
Width B (mm)
8
Boundary dimensions fix what fits the shaft and housing. Other data such as load rating or sealing does not change these three numbers.
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