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NTN 387AS/383A: bore d 2.2500 in, outside diameter D 3.9370 in, width W 0.8268 in, drawn to scaled 2.2500 inD 3.9370 inW 0.8268 in
Drawing: BearingLookup, to the printed bore d, outside diameter D and width W cited in the specifications below; internal detail is illustrative.

NTN 387AS/383A inch tapered roller bearing

NTN 387AS/383A inch tapered roller bearing: bore d 2.2500 in (57.150 mm), outside diameter D 3.9370 in (100.000 mm), width 0.8268 in (21.000 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 D3.9370 in (100.000 mm)
Width0.8268 in (21.000 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

Same size, other makers and types (57.15 × 100 × 21 mm)

PartManufacturerType
CR-1194PX1NTNmetric tapered roller bearing

These match this part on the dimensions each maker prints. A size match is not a stated interchange: check the other specifications before substituting.

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