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NTN 12580/12520: bore d 0.8130 in, outside diameter D 1.9380 in, width W 0.7813 in, drawn to scaled 0.8130 inD 1.9380 inW 0.7813 in
Drawing: BearingLookup, to the printed bore d, outside diameter D and width W cited in the specifications below; internal detail is illustrative.

NTN 12580/12520 inch tapered roller bearing

NTN 12580/12520 inch tapered roller bearing: bore d 0.8130 in (20.638 mm), outside diameter D 1.9380 in (49.225 mm), width 0.7813 in (19.845 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 d0.8130 in (20.638 mm)
Outside diameter D1.9380 in (49.225 mm)
Width0.7813 in (19.845 mm)
Basic dynamic load rating Cr37.50 kN
Basic static load rating C0r39.00 kN

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

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