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NTN 6921LUNC3: bore d 105.000 mm, outside diameter D 145.000 mm, width B 20.000 mm, drawn to scaled 105.000 mmD 145.000 mmB 20.000 mm
Drawing: BearingLookup, to the printed bore d, outside diameter D and width B cited in the specifications below; internal detail is illustrative; seals or shields, if any, are not shown.

NTN 6921LUNC3 deep groove ball bearing

NTN 6921LUNC3 deep groove ball bearing: bore d 105.000 mm (4.1339 in), outside diameter D 145.000 mm (5.7087 in), width 20.000 mm (0.7874 in).

Deep groove ball bearings · All NTN part numbers

Open deep groove ball bearing with its steel balls visible
A typical deep groove ball bearing — not necessarily this part. Photo: “1984 deep groove ball bearing UR 6304 made in Czechoslovakia by ZKL” by R. Henrik Nilsson, CC BY 4.0, via Wikimedia Commons (resized).

Specifications

Bore d105.000 mm (4.1339 in)
Outside diameter D145.000 mm (5.7087 in)
Width20.000 mm (0.7874 in)
Basic dynamic load rating Cr47.00 kN
Basic static load rating C0r42.00 kN

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

Same size, other makers and types (105 × 145 × 20 mm)

PartManufacturerType
7921CKoyoangular contact ball bearing
6921-1 2RSKoyodeep groove ball bearing
6921-1 2RUKoyodeep groove ball bearing
6921-1 ZZKoyodeep groove ball bearing
6921Koyodeep groove ball 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