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NTN 578/572: bore d 3.1490 in, outside diameter D 5.5115 in, width W 1.4375 in, drawn to scaled 3.1490 inD 5.5115 inW 1.4375 in
Drawing: BearingLookup, to the printed bore d, outside diameter D and width W cited in the specifications below; internal detail is illustrative.

NTN 578/572 inch tapered roller bearing

NTN 578/572 inch tapered roller bearing: bore d 3.1490 in (79.985 mm), outside diameter D 5.5115 in (139.992 mm), width 1.4375 in (36.512 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 d3.1490 in (79.985 mm)
Outside diameter D5.5115 in (139.992 mm)
Width1.4375 in (36.512 mm)
Basic dynamic load rating Cr188.00 kN
Basic static load rating C0r288.00 kN

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

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