HR31318J is a NSK tapered roller bearing, bore 90 mm, O.D. 190 mm, width 43 mm, dynamic rating 59,300 lbs. Dimensions, drawing, interchanges and price.
Original catalogue drawing - NSK catalogue, page 109
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
90
3.5433
D
Outside diameter
190
7.4803
B
Inner-ring / bearing width
43
1.6929
T
Overall assembly width
46.5
1.8307
C
Cup / outer-ring width
30
1.1811
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)
90
Bore d (in)
3.5433
Outside dia. D (mm)
190
Outside dia. D (in)
7.4803
Width B (mm)
43
Width B (in)
1.6929
Overall width T (mm)
46.5
Overall width T (in)
1.8307
Cup width C (mm)
30
Cup width C (in)
1.1811
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
59300
Basic static load rating Cor (lbs)
70800
Limiting speed - grease (rpm)
1,980
Limiting speed - oil (rpm)
2,690
Weight
Weight (kg)
5.52
Mounting dimensions (fillets / shoulders)
Chamfer r (in)
0.10
Shaft shoulder da min (in)
4.252
Housing shoulder Da max (in)
6.929
Shaft shoulder db max (in)
4.339
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 600 rpm
4
65,945
102
2,822
6
43,963
392
10,903
8
32,972
1,024
28,444
10
26,378
2,154
59,845
15
17,585
8,323
231,207
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 263,780 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.111 (dimensions) / p.112 (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.
