244 is a NSK cylindrical roller bearing, bore 220 mm, O.D. 400 mm, width 65 mm, dynamic rating 171,000 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
220
8.6614
D
Outside diameter
400
15.748
B
Inner-ring / bearing width
65
2.5591
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)
220
Bore d (in)
8.6614
Outside dia. D (mm)
400
Outside dia. D (in)
15.7480
Width B (mm)
65
Width B (in)
2.5591
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
171000
Basic static load rating Cor (lbs)
242000
Limiting speed - grease (rpm)
1,500
Limiting speed - oil (rpm)
1,800
Weight
Weight (kg)
37.195
Mounting dimensions (fillets / shoulders)
Fillet ra max (in)
0.118
Fillet rb max (in)
0.118
Shaft shoulder da min (in)
10.394
Housing shoulder Da max (in)
15.118
Shaft shoulder db min (in)
9.291
Shaft shoulder db max (in)
10.394
Housing shoulder Db min (in)
14.055
Housing shoulder Db max (in)
15.118
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
190,161
102
3,386
6
126,774
392
13,083
8
95,081
1,024
34,133
10
76,065
2,154
71,814
15
50,710
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 760,646 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.
