HR31330NSKTapered Roller

Name: NSK HR31330 Tapered Roller Bearing
Brand: NSK
SKU: HR31330

HR31330 is a NSK tapered roller bearing, bore 150 mm, O.D. 320 mm, width 75 mm, dynamic rating 975 kN. Dimensions, drawing, interchanges and price.

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Bore d150mm

Outside dia. D320mm

Width B75mm

Dynamic Cr975kN

Static C0r1100kN

Limiting speed1,000rpm

Weight28.5kg

Cr / C0r0.89

Mean dia. dm235mm

Original catalogue drawing - NSK E1103, page 268

HR31330 NSK Tapered Roller bearing catalogue drawing

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	150	5.9055
D	Outside diameter	320	12.5984
B	Inner-ring / bearing width	75	2.9528
T	Overall assembly width	82	3.2283
C	Cup / outer-ring width	50	1.9685
r	Chamfer (min)	4	0.1575

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)	150
Outside dia. D (mm)	320
Width B (mm)	75
Overall width T (mm)	82
Cup width C (mm)	50

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	219189
Basic static load rating Cor (lbs)	247290
Basic dynamic load rating Cr (N)	975000
Basic static load rating C0r (N)	1100000
Limiting speed - grease (rpm)	1,000
Effective load centre a (mm)	5

Weight

Weight (kg)	28.5

Mounting dimensions (fillets / shoulders)

Housing fillet r max (mm)	4

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 300 rpm
4	243,750	102	5,644
6	162,500	392	21,805
8	121,875	1,024	56,889
10	97,500	2,154	119,691
15	65,000	8,323	462,415

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 975,000 N. Hours = L₁₀ x 10⁶ / (60n). Life-modification factors for lubrication, contamination and temperature (a_ISO) are not included.

Source & traceability

Brand	NSK
Source catalogue	NSK CAT. No. E1103 (metric)
Catalogue page	p.268 (dimensions)

Load ratings in newtons, weights in kg, limiting speeds for grease and oil lubrication.

Interchange - same dimensions, other brands

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
31330-X	FAG	Tapered Roller	150	320	75	790 kN	28
31330-X-XL	FAG	Tapered Roller	150	320	75	930 kN	27.8
31330X	Timken	Tapered Roller	150	320	75	862 kN	28.15

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
30230	NSK	Tapered Roller	150	270	45	97,800 lbs	10.7
30330	NSK	Tapered Roller	150	320	65	155,000 lbs	24.204
32330	NSK	Tapered Roller	150	320	108	252,000 lbs	41.408
32930	NSK	Tapered Roller	150	210	36	305 kN	3.8
HR30330	NSK	Tapered Roller	150	320	65	1020 kN	25
HR31330J	NSK	Tapered Roller	150	320	65	137,100 lbs	28.477
HR32030	NSK	Tapered Roller	150	225	48	460 kN	6.6
HR32030XJ	NSK	Tapered Roller	150	225	48	375,000 lbs	6.6

Request a quotation for HR31330

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