2311 is a NSK cylindrical roller bearing, bore 55 mm, O.D. 120 mm, width 43 mm, dynamic rating 33,200 lbs. Dimensions, drawing, interchanges and price.
Original catalogue drawing - NSK catalogue, page 63
Scanned from the manufacturer catalogue page listing this part number. All part numbers printed on that table share the same drawing.
Scale cross-section
Blue = inner / outer ring, yellow = rolling element. Drawn to scale from this part's own
dimensions for selection reference only - not a manufacturing or assembly drawing.
Dimension table (mm / inch)
Symbol
Dimension
mm
inch
d
Bore diameter
55
2.1654
D
Outside diameter
120
4.7244
B
Inner-ring / bearing width
43
1.6929
Notes
Cylindrical roller entries from the NSK inch catalogue are series numbers covering the N / NU / NJ / NUP / NH prefixes of the same size. Weights are given in kg. Load ratings are shown in both the original catalogue units and the converted value (1 N = 0.2248 lbf). Data is provided for selection reference only - confirm against the latest official catalogue before ordering.
Main dimensions
Bore d (mm)
55
Bore d (in)
2.1654
Outside dia. D (mm)
120
Outside dia. D (in)
4.7244
Width B (mm)
43
Width B (in)
1.6929
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
33200
Basic static load rating Cor (lbs)
36300
Limiting speed - grease (rpm)
4,500
Limiting speed - oil (rpm)
5,600
Weight
Weight (kg)
2.136
Mounting dimensions (fillets / shoulders)
Fillet ra max (in)
0.079
Fillet rb max (in)
0.079
Shaft shoulder da min (in)
2.520
Housing shoulder Da max (in)
4.370
Shaft shoulder db min (in)
2.520
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 1,500 rpm
4
36,920
102
1,129
6
24,613
392
4,361
8
18,460
1,024
11,378
10
14,768
2,154
23,938
15
9,845
8,323
92,483
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 147,681 N. Hours = L10 x 106 / (60n). Life-modification factors for lubrication, contamination and temperature (aISO) are not included.
Source & traceability
Brand
NSK
Source catalogue
NSK inch product catalogue
Catalogue page
p.65 (dimensions) / p.66 (ratings)
Dimensions in inches and millimetres, load ratings in lbs.
Send us the quantity you need and we will come back with price and
lead time, normally within 24 hours. Equivalent parts from other brands can be quoted at the same time.
