260 is a NSK cylindrical roller bearing, bore 300 mm, O.D. 540 mm, width 85 mm, dynamic rating 315,000 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
300
11.811
D
Outside diameter
540
21.2598
B
Inner-ring / bearing width
85
3.3465
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)
300
Bore d (in)
11.8110
Outside dia. D (mm)
540
Outside dia. D (in)
21.2598
Width B (mm)
85
Width B (in)
3.3465
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
315000
Basic static load rating Cor (lbs)
464000
Limiting speed - grease (rpm)
1,100
Limiting speed - oil (rpm)
1,300
Weight
Weight (kg)
88.904
Mounting dimensions (fillets / shoulders)
Fillet ra max (in)
0.157
Fillet rb max (in)
0.157
Shaft shoulder da min (in)
14.094
Housing shoulder Da max (in)
20.472
Shaft shoulder db min (in)
12.598
Shaft shoulder db max (in)
14.094
Housing shoulder Db min (in)
19.055
Housing shoulder Db max (in)
20.472
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 300 rpm
4
350,297
102
5,644
6
233,532
392
21,805
8
175,149
1,024
56,889
10
140,119
2,154
119,691
15
93,413
8,323
462,415
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 1,401,190 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.
