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NTN 3578A/3525: bore d 1.7500 in, outside diameter D 3.4375 in, width W 1.1875 in, drawn to scaled 1.7500 inD 3.4375 inW 1.1875 in
Drawing: BearingLookup, to the printed bore d, outside diameter D and width W cited in the specifications below; internal detail is illustrative.

NTN 3578A/3525 inch tapered roller bearing

NTN 3578A/3525 inch tapered roller bearing: bore d 1.7500 in (44.450 mm), outside diameter D 3.4375 in (87.313 mm), width 1.1875 in (30.162 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 d1.7500 in (44.450 mm)
Outside diameter D3.4375 in (87.313 mm)
Width1.1875 in (30.162 mm)
Basic dynamic load rating Cr94.00 kN
Basic static load rating C0r117.00 kN

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

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