HR30306JNSKTapered Roller

Name: NSK HR30306J Tapered Roller Bearing
Brand: NSK
SKU: HR30306J

HR30306J is a NSK tapered roller bearing, bore 30 mm, O.D. 72 mm, width 19 mm, dynamic rating 13,400 lbs. Dimensions, drawing, interchanges and price.

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Bore d30mm

Outside dia. D72mm

Width B19mm

Dynamic Cr13,400lbs

Static C0r13,500lbs

Limiting speed5,300rpm

Weight0.404kg

Cr / C0r0.99

Mean dia. dm51mm

Original catalogue drawing - NSK catalogue, page 107

HR30306J 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	30	1.1811
D	Outside diameter	72	2.8346
B	Inner-ring / bearing width	19	0.748
T	Overall assembly width	20.75	0.8169
C	Cup / outer-ring width	16	0.6299

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)	30
Bore d (in)	1.1811
Outside dia. D (mm)	72
Outside dia. D (in)	2.8346
Width B (mm)	19
Width B (in)	0.7480
Overall width T (mm)	20.75
Overall width T (in)	0.8169
Cup width C (mm)	16
Cup width C (in)	0.6299

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	13400
Basic static load rating Cor (lbs)	13500
Limiting speed - grease (rpm)	5,300
Limiting speed - oil (rpm)	7,500

Weight

Weight (kg)	0.404

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.06
Shaft shoulder da min (in)	1.614
Housing shoulder Da max (in)	2.480
Shaft shoulder db max (in)	1.575

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 1,700 rpm
4	14,902	102	996
6	9,934	392	3,848
8	7,451	1,024	10,039
10	5,961	2,154	21,122
15	3,974	8,323	81,603

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 59,606 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 inch product catalogue
Catalogue page	p.109 (dimensions) / p.110 (ratings)

Dimensions in inches and millimetres, load ratings in lbs.

Interchange - same dimensions, other brands

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1306-K-TVH-C3	FAG	Ball	30	72	19	21.7 kN	0.379
1306-TVH	FAG	Ball	30	72	19	21.7 kN	0.384
6306	FAG	Ball	30	72	19	29 kN	0.355
6306-2RSR	FAG	Ball	30	72	19	29 kN	0.365
6306-2Z	FAG	Ball	30	72	19	29 kN	0.363
6306-C	FAG	Ball	30	72	19	32 kN	0.328
6306-C-2BRS	FAG	Ball	30	72	19	32 kN	0.339
6306-C-2HRS	FAG	Ball	30	72	19	32 kN	0.34
6306-C-2Z	FAG	Ball	30	72	19	32 kN	0.339
QJ306-TVP	FAG	Ball	30	72	19	58.5 kN	0.379

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1306	NSK	Ball	30	72	19	4,770 lbs	0.408
6306	NSK	Ball	30	72	19	5,990 lbs	0.345
7306B	NSK	Ball	30	72	19	6,550 lbs	0.358
BL306	NSK	Ball	30	72	19	7,410 lbs	0.363
306	NSK	Cylindrical Roller	30	72	19	8,690 lbs	0.358
NU306E	NSK	Cylindrical Roller	30	72	19	65.5 kN	0.409
HR30306	NSK	Tapered Roller	30	72	19	73 kN	0.403
HR30306C	NSK	Tapered Roller	30	72	19	12,700 lbs	0.39

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
15117/15245	NSK	Tapered Roller	30	62	20.64	10,400 lbs	0.263
15117/15250	NSK	Tapered Roller	30	63.5	20.64	10,400 lbs	0.295
HR30206	NSK	Tapered Roller	30	62	16	53 kN	0.238
HR30206C	NSK	Tapered Roller	30	62	16	7,980 lbs	0.238
HR30206J	NSK	Tapered Roller	30	62	16	9,670 lbs	0.236
HR30306	NSK	Tapered Roller	30	72	19	73 kN	0.403
HR30306C	NSK	Tapered Roller	30	72	19	12,700 lbs	0.39
HR31306	NSK	Tapered Roller	30	72	19	60.5 kN	0.393

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