Original catalogue drawing - NSK catalogue, page 201
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
180
7.0866
D
Outside diameter
250
9.8425
B
Inner-ring / bearing width
33
1.2992
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)
180
Bore d (in)
7.0866
Outside dia. D (mm)
250
Outside dia. D (in)
9.8425
Width B (mm)
33
Width B (in)
1.2992
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
30600
Basic static load rating Cor (lbs)
39200
Limiting speed - grease (rpm)
4,700
Limiting speed - oil (rpm)
7,000
Weight
Weight (kg)
4.94
Mounting dimensions (fillets / shoulders)
Fillet ra (in)
0.079
Fillet rb (in)
0.039
Shaft shoulder da (in)
7.480
Housing shoulder Da (in)
9.449
Housing shoulder Db (in)
9.606
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 1,500 rpm
4
34,029
64
711
6
22,686
216
2,400
8
17,014
512
5,689
10
13,612
1,000
11,111
15
9,074
3,375
37,500
Basic rating life per ISO 281: L10 = (C/P)3 with C = 136,116 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.203 (dimensions) / p.204 (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.
