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NTN 387A/382S: bore d 2.2500 in, outside diameter D 3.8125 in, width W 1.0000 in, drawn to scaled 2.2500 inD 3.8125 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 387A/382S inch tapered roller bearing

NTN 387A/382S inch tapered roller bearing: bore d 2.2500 in (57.150 mm), outside diameter D 3.8125 in (96.838 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 d2.2500 in (57.150 mm)
Outside diameter D3.8125 in (96.838 mm)
Width1.0000 in (25.400 mm)
Basic dynamic load rating Cr82.50 kN
Basic static load rating C0r105.00 kN

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

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