HR31309J is a NSK tapered roller bearing, bore 45 mm, O.D. 100 mm, width 25 mm, dynamic rating 21,500 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
45
1.7717
D
Outside diameter
100
3.937
B
Inner-ring / bearing width
25
0.9843
T
Overall assembly width
27.25
1.0728
C
Cup / outer-ring width
18
0.7087
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)
45
Bore d (in)
1.7717
Outside dia. D (mm)
100
Outside dia. D (in)
3.9370
Width B (mm)
25
Width B (in)
0.9843
Overall width T (mm)
27.25
Overall width T (in)
1.0728
Cup width C (mm)
18
Cup width C (in)
0.7087
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
21500
Basic static load rating Cor (lbs)
24500
Limiting speed - grease (rpm)
3,850
Limiting speed - oil (rpm)
5,230
Weight
Weight (kg)
0.73
Mounting dimensions (fillets / shoulders)
Chamfer r (in)
0.06
Shaft shoulder da min (in)
2.185
Housing shoulder Da max (in)
3.583
Shaft shoulder db max (in)
2.244
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 1,200 rpm
4
23,909
102
1,411
6
15,939
392
5,451
8
11,955
1,024
14,222
10
9,564
2,154
29,923
15
6,376
8,323
115,604
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 95,637 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.
