228 is a NSK cylindrical roller bearing, bore 140 mm, O.D. 250 mm, width 42 mm, dynamic rating 67,100 lbs. Dimensions, drawing, interchanges and price.
Original catalogue drawing - NSK catalogue, page 53
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
140
5.5118
D
Outside diameter
250
9.8425
B
Inner-ring / bearing width
42
1.6535
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)
140
Bore d (in)
5.5118
Outside dia. D (mm)
250
Outside dia. D (in)
9.8425
Width B (mm)
42
Width B (in)
1.6535
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
67100
Basic static load rating Cor (lbs)
83600
Limiting speed - grease (rpm)
2,400
Limiting speed - oil (rpm)
3,000
Weight
Weight (kg)
8.165
Mounting dimensions (fillets / shoulders)
Fillet ra max (in)
0.099
Fillet rb max (in)
0.098
Shaft shoulder da min (in)
6.063
Housing shoulder Da max (in)
9.331
Shaft shoulder db min (in)
6.024
Shaft shoulder db max (in)
6.496
Housing shoulder Db min (in)
8.858
Housing shoulder Db max (in)
9.331
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 800 rpm
4
74,619
102
2,117
6
49,746
392
8,177
8
37,309
1,024
21,333
10
29,848
2,154
44,884
15
19,898
8,323
173,406
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 298,476 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.55 (dimensions) / p.56 (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.
