HR30304JNSKTapered Roller

Name: NSK HR30304J Tapered Roller Bearing
Brand: NSK
SKU: HR30304J

HR30304J is a NSK tapered roller bearing, bore 20 mm, O.D. 52 mm, width 15 mm, dynamic rating 7,870 lbs. Dimensions, drawing, interchanges and price.

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Bore d20mm

Outside dia. D52mm

Width B15mm

Dynamic Cr7,870lbs

Static C0r7,530lbs

Limiting speed7,500rpm

Weight0.172kg

Cr / C0r1.05

Mean dia. dm36mm

Original catalogue drawing - NSK catalogue, page 107

HR30304J 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	20	0.7874
D	Outside diameter	52	2.0472
B	Inner-ring / bearing width	15	0.5906
T	Overall assembly width	16.25	0.6398
C	Cup / outer-ring width	13	0.5118

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)	20
Bore d (in)	0.7874
Outside dia. D (mm)	52
Outside dia. D (in)	2.0472
Width B (mm)	15
Width B (in)	0.5906
Overall width T (mm)	16.25
Overall width T (in)	0.6398
Cup width C (mm)	13
Cup width C (in)	0.5118

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	7870
Basic static load rating Cor (lbs)	7530
Limiting speed - grease (rpm)	7,500
Limiting speed - oil (rpm)	10,000

Weight

Weight (kg)	0.172

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.06
Shaft shoulder da min (in)	1.220
Housing shoulder Da max (in)	1.732
Shaft shoulder db max (in)	1.063

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 2,500 rpm
4	8,752	102	677
6	5,835	392	2,617
8	4,376	1,024	6,827
10	3,501	2,154	14,363
15	2,334	8,323	55,490

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 35,008 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
1304-TVH	FAG	Ball	20	52	15	12.7 kN	0.163
6304	FAG	Ball	20	52	15	16.9 kN	0.151
6304-2RSR	FAG	Ball	20	52	15	16.9 kN	0.155
6304-2Z	FAG	Ball	20	52	15	16.9 kN	0.155
QJ304-MPA	FAG	Ball	20	52	15	30 kN	0.184
QJ304-XL-MPA	FAG	Ball	20	52	15	31 kN	0.184
S6304	FAG	Ball	20	52	15	16 kN	0.153
NJ304-E-TVP2	FAG	Cylindrical Roller	20	52	15	36.5 kN	0.156
NJ304-E-XL-TVP2	FAG	Cylindrical Roller	20	52	15	37.5 kN	0.156
NU304-E-TVP2	FAG	Cylindrical Roller	20	52	15	36.5 kN	0.153

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1304	NSK	Ball	20	52	15	2,810 lbs	0.172
6304	NSK	Ball	20	52	15	3,580 lbs	0.145
7304B	NSK	Ball	20	52	15	3,640 lbs	0.15
21304CDE4	NSK	Spherical Roller	20	52	15	29.3 kN	0.17
30304	NSK	Tapered Roller	20	52	15	31 kN	0.168
HR30304	NSK	Tapered Roller	20	52	15	43 kN	0.172
7304	NSK	Precision / Angular Contact	20	52	15	20.6 kN	0.146

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
05079/05185	NSK	Tapered Roller	20	47	14.38	5,360 lbs	0.113
30304	NSK	Tapered Roller	20	52	15	31 kN	0.168
HR30204	NSK	Tapered Roller	20	47	14	34.5 kN	0.127
HR30204C	NSK	Tapered Roller	20	47	14	5,370 lbs	0.122
HR30204J	NSK	Tapered Roller	20	47	14	6,270 lbs	0.127
HR30304	NSK	Tapered Roller	20	52	15	43 kN	0.172
HR30304C	NSK	Tapered Roller	20	52	16	6,970 lbs	0.168
HR32004	NSK	Tapered Roller	20	42	15	30.5 kN	0.097

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