HR30310C is a NSK tapered roller bearing, bore 50 mm, O.D. 110 mm, width 27 mm, dynamic rating 26,800 lbs. Dimensions, drawing, interchanges and price.
Original catalogue drawing - NSK catalogue, page 127
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
50
1.9685
D
Outside diameter
110
4.3307
B
Inner-ring / bearing width
27
1.063
T
Overall assembly width
29.25
1.1516
C
Cup / outer-ring width
20
0.7874
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)
50
Bore d (in)
1.9685
Outside dia. D (mm)
110
Outside dia. D (in)
4.3307
Width B (mm)
27
Width B (in)
1.0630
Overall width T (mm)
29.25
Overall width T (in)
1.1516
Cup width C (mm)
20
Cup width C (in)
0.7874
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
26800
Basic static load rating Cor (lbs)
31000
Limiting speed - grease (rpm)
3,400
Limiting speed - oil (rpm)
4,500
Weight
Weight (kg)
1.252
Mounting dimensions (fillets / shoulders)
Chamfer r (in)
0.079
Shaft shoulder da min (in)
2.561
Housing shoulder Da max (in)
3.937
Shaft shoulder db max (in)
2.559
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 1,100 rpm
4
29,803
102
1,539
6
19,869
392
5,947
8
14,902
1,024
15,515
10
11,921
2,154
32,643
15
7,947
8,323
126,113
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 119,212 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.129 (dimensions) / p.130 (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.
