Original catalogue drawing - NSK catalogue, page 197
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
170
6.6929
D
Outside diameter
310
12.2047
B
Inner-ring / bearing width
52
2.0472
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)
170
Bore d (in)
6.6929
Outside dia. D (mm)
310
Outside dia. D (in)
12.2047
Width B (mm)
52
Width B (in)
2.0472
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
68300
Basic static load rating Cor (lbs)
83800
Limiting speed - grease (rpm)
3,400
Limiting speed - oil (rpm)
4,500
Weight
Weight (kg)
17.205
Mounting dimensions (fillets / shoulders)
Fillet ra (in)
0.118
Fillet rb (in)
0.059
Shaft shoulder da (in)
7.402
Housing shoulder Da (in)
11.496
Housing shoulder Db (in)
11.850
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 1,100 rpm
4
75,953
64
970
6
50,636
216
3,273
8
37,977
512
7,758
10
30,381
1,000
15,152
15
20,254
3,375
51,136
Basic rating life per ISO 281: L10 = (C/P)3 with C = 303,814 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.199 (dimensions) / p.200 (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.
