320 is a NSK cylindrical roller bearing, bore 100 mm, O.D. 215 mm, width 47 mm, dynamic rating 67,100 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
100
3.937
D
Outside diameter
215
8.4646
B
Inner-ring / bearing width
47
1.8504
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)
100
Bore d (in)
3.9370
Outside dia. D (mm)
215
Outside dia. D (in)
8.4646
Width B (mm)
47
Width B (in)
1.8504
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
67100
Basic static load rating Cor (lbs)
75900
Limiting speed - grease (rpm)
2,800
Limiting speed - oil (rpm)
3,400
Weight
Weight (kg)
7.711
Mounting dimensions (fillets / shoulders)
Fillet ra max (in)
0.099
Fillet rb max (in)
0.098
Shaft shoulder da min (in)
4.449
Housing shoulder Da max (in)
7.913
Shaft shoulder db min (in)
4.449
Shaft shoulder db max (in)
4.961
Housing shoulder Db min (in)
7.480
Housing shoulder Db max (in)
7.953
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 900 rpm
4
74,619
102
1,881
6
49,746
392
7,268
8
37,309
1,024
18,963
10
29,848
2,154
39,897
15
19,898
8,323
154,138
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.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.
