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NTN 6311LU: bore d 55.000 mm, outside diameter D 120.000 mm, width B 29.000 mm, drawn to scaled 55.000 mmD 120.000 mmB 29.000 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 6311LU deep groove ball bearing

NTN 6311LU deep groove ball bearing: bore d 55.000 mm (2.1650 in), outside diameter D 120.000 mm (4.7244 in), width 29.000 mm (1.1417 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 d55.000 mm (2.1650 in)
Outside diameter D120.000 mm (4.7244 in)
Width29.000 mm (1.1417 in)
Basic dynamic load rating Cr79.50 kN
Basic static load rating C0r45.00 kN

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

Same size, other makers and types (55 × 120 × 29 mm)

PartManufacturerType
7311Koyoangular contact ball bearing
7311BKoyoangular contact ball bearing
7311CKoyoangular contact ball bearing
N311Koyocylindrical roller bearing
NF311Koyocylindrical roller bearing
NJ311RKoyocylindrical roller bearing
NU311RKoyocylindrical roller bearing
NUP311RKoyocylindrical roller bearing
6311 2RSKoyodeep groove ball bearing
6311 2RUKoyodeep groove ball bearing
6311 ZZKoyodeep groove ball bearing
6311Koyodeep 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. 6 more share this size.

Related parts

Sources