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1/4 in x 7/16 in x 1/4 in Koyo NRB M-441 Drawn Cup Needle Roller BearingsProduct features

Calculation factor kr: 0.03 B: 4.978 mm Basic dynamic load rating C: 0.741 kN
Calculation factor f0: 6.4 Reference speed: 110000 r/min r1,2 min.: 0.3 mm
D: 12.7 mm Limiting speed: 56000 r/min D2 ≈: 11.15 mm
da min.: 6.4 mm Size (mm): 1/4 in x 7/16 in x 1/4 in

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