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NTN 28990/28920: bore d 2.4400 in, outside diameter D 4.0000 in, width W 1.0000 in, drawn to scaled 2.4400 inD 4.0000 inW 1.0000 in
Drawing: BearingLookup, to the printed bore d, outside diameter D and width W cited in the specifications below; internal detail is illustrative.

NTN 28990/28920 inch tapered roller bearing

NTN 28990/28920 inch tapered roller bearing: bore d 2.4400 in (61.976 mm), outside diameter D 4.0000 in (101.600 mm), width 1.0000 in (25.400 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 d2.4400 in (61.976 mm)
Outside diameter D4.0000 in (101.600 mm)
Width1.0000 in (25.400 mm)
Basic dynamic load rating Cr90.50 kN
Basic static load rating C0r134.00 kN

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

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