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NTN 30304A: bore d 20.000 mm, outside diameter D 52.000 mm, width T 16.250 mm, drawn to scaled 20.000 mmD 52.000 mmT 16.250 mm
Drawing: BearingLookup, to the printed bore d, outside diameter D and width T cited in the specifications below; internal detail is illustrative.

NTN 30304A metric tapered roller bearing

NTN 30304A metric tapered roller bearing: bore d 20.000 mm (0.7874 in), outside diameter D 52.000 mm (2.0472 in), width 16.250 mm (0.6398 in).

Metric tapered roller bearings · All NTN part numbers

Cutaway rendering of a tapered roller bearing with the cup pulled away to show the tapered rollers on the cone
A typical metric tapered roller bearing — not necessarily this part. Photo: “Tapered-roller-bearing din720 120-ex” by Silberwolf, CC BY 2.5, via Wikimedia Commons (resized).

Specifications

Bore d20.000 mm (0.7874 in)
Outside diameter D52.000 mm (2.0472 in)
Width16.250 mm (0.6398 in)
Basic dynamic load rating Cr35.50 kN
Basic static load rating C0r34.00 kN

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

Same size, other makers and types (20 × 52 × 16.25 mm)

PartManufacturerType
30304ACKoyometric tapered roller bearing
30304AJRKoyometric 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.

Related parts

Sources