338 is a NSK cylindrical roller bearing, bore 190 mm, O.D. 400 mm, width 78 mm, dynamic rating 219,000 lbs. Dimensions, drawing, interchanges and price.
Original catalogue drawing - NSK catalogue, page 55
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
190
7.4803
D
Outside diameter
400
15.748
B
Inner-ring / bearing width
78
3.0709
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)
190
Bore d (in)
7.4803
Outside dia. D (mm)
400
Outside dia. D (in)
15.7480
Width B (mm)
78
Width B (in)
3.0709
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
219000
Basic static load rating Cor (lbs)
284000
Limiting speed - grease (rpm)
1,400
Limiting speed - oil (rpm)
1,700
Weight
Weight (kg)
49.442
Mounting dimensions (fillets / shoulders)
Fillet ra max (in)
0.157
Fillet rb max (in)
0.157
Shaft shoulder da min (in)
8.268
Housing shoulder Da max (in)
14.961
Shaft shoulder db min (in)
8.268
Shaft shoulder db max (in)
9.449
Housing shoulder Db min (in)
13.858
Housing shoulder Db max (in)
14.961
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 400 rpm
4
243,540
102
4,233
6
162,360
392
16,354
8
121,770
1,024
42,667
10
97,416
2,154
89,768
15
64,944
8,323
346,811
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 974,161 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.57 (dimensions) / p.58 (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.
