Original catalogue drawing - NSK catalogue, page 41
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
250
9.8425
B
Inner-ring / bearing width
58
2.2835
r
Chamfer (min)
2.997
0.118
Notes
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)
250
Outside dia. D (in)
9.8425
Width B (mm)
58
Width B (in)
2.2835
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
49800
Basic static load rating Cor (lbs)
47800
Limiting speed - grease (rpm)
2,200
Limiting speed - oil (rpm)
3,100
Weight
Weight (kg)
14.969
Mounting dimensions (fillets / shoulders)
Chamfer r (in)
0.118
Shaft shoulder da min (in)
4.646
Housing shoulder Da max (in)
9.134
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 700 rpm
4
55,380
64
1,524
6
36,920
216
5,143
8
27,690
512
12,190
10
22,152
1,000
23,810
15
14,768
3,375
80,357
Basic rating life per ISO 281: L10 = (C/P)3 with C = 221,521 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.43 (dimensions) / p.44 (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.
