324 is a NSK cylindrical roller bearing, bore 120 mm, O.D. 260 mm, width 55 mm, dynamic rating 101,000 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
120
4.7244
D
Outside diameter
260
10.2362
B
Inner-ring / bearing width
55
2.1654
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)
120
Bore d (in)
4.7244
Outside dia. D (mm)
260
Outside dia. D (in)
10.2362
Width B (mm)
55
Width B (in)
2.1654
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
101000
Basic static load rating Cor (lbs)
114000
Limiting speed - grease (rpm)
2,200
Limiting speed - oil (rpm)
2,800
Weight
Weight (kg)
13.154
Mounting dimensions (fillets / shoulders)
Fillet ra max (in)
0.099
Fillet rb max (in)
0.098
Shaft shoulder da min (in)
5.236
Housing shoulder Da max (in)
9.685
Shaft shoulder db min (in)
5.236
Shaft shoulder db max (in)
5.906
Housing shoulder Db min (in)
9.055
Housing shoulder Db max (in)
9.724
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 700 rpm
4
112,318
102
2,419
6
74,878
392
9,345
8
56,159
1,024
24,381
10
44,927
2,154
51,296
15
29,951
8,323
198,178
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 449,270 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.
