421 is a NSK cylindrical roller bearing, bore 105 mm, O.D. 260 mm, width 60 mm, dynamic rating 111,000 lbs. Dimensions, drawing, interchanges and price.
Original catalogue drawing - NSK catalogue, page 57
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
105
4.1339
D
Outside diameter
260
10.2362
B
Inner-ring / bearing width
60
2.3622
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)
105
Bore d (in)
4.1339
Outside dia. D (mm)
260
Outside dia. D (in)
10.2362
Width B (mm)
60
Width B (in)
2.3622
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
111000
Basic static load rating Cor (lbs)
124000
Limiting speed - grease (rpm)
2,400
Limiting speed - oil (rpm)
3,000
Weight
Weight (kg)
17.237
Mounting dimensions (fillets / shoulders)
Fillet ra max (in)
0.118
Fillet rb max (in)
0.118
Shaft shoulder da min (in)
--
Housing shoulder Da max (in)
9.606
Shaft shoulder db min (in)
4.764
Shaft shoulder db max (in)
5.551
Housing shoulder Db min (in)
--
Housing shoulder Db max (in)
--
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 800 rpm
4
123,438
102
2,117
6
82,292
392
8,177
8
61,719
1,024
21,333
10
49,375
2,154
44,884
15
32,917
8,323
173,406
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 493,753 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.59 (dimensions) / p.60 (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.
