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NTN 28580/28521: bore d 2.0000 in, outside diameter D 3.6250 in, width W 0.9688 in, drawn to scaled 2.0000 inD 3.6250 inW 0.9688 in
Drawing: BearingLookup, to the printed bore d, outside diameter D and width W cited in the specifications below; internal detail is illustrative.

NTN 28580/28521 inch tapered roller bearing

NTN 28580/28521 inch tapered roller bearing: bore d 2.0000 in (50.800 mm), outside diameter D 3.6250 in (92.075 mm), width 0.9688 in (24.608 mm).

Inch tapered roller bearings · All NTN part numbers

Rendering of a tapered roller bearing with the outer cup separated from the cone and its ring of tapered rollers
A typical inch tapered roller bearing — not necessarily this part. Photo: “Tapered-roller-bearing din720 ex” by Silberwolf, CC BY 2.5, via Wikimedia Commons (resized).

Specifications

Bore d2.0000 in (50.800 mm)
Outside diameter D3.6250 in (92.075 mm)
Width0.9688 in (24.608 mm)
Basic dynamic load rating Cr83.50 kN
Basic static load rating C0r116.00 kN

All specifications: Verified printed in NTN’s own product listing

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