HR303/22NSKTapered Roller

Name: NSK HR303/22 Tapered Roller Bearing
Brand: NSK
SKU: HR303/22

HR303/22 is a NSK tapered roller bearing, bore 22 mm, O.D. 56 mm, width 16 mm, dynamic rating 8,320 lbs. Dimensions, drawing, interchanges and price.

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Bore d22mm

Outside dia. D56mm

Width B16mm

Dynamic Cr8,320lbs

Static C0r8,210lbs

Limiting speed7,160rpm

Weight0.209kg

Cr / C0r1.01

Mean dia. dm39mm

Original catalogue drawing - NSK catalogue, page 107

HR303/22 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	22	0.8661
D	Outside diameter	56	2.2047
B	Inner-ring / bearing width	16	0.6299
T	Overall assembly width	17.25	0.6791
C	Cup / outer-ring width	14	0.5512

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)	22
Bore d (in)	0.8661
Outside dia. D (mm)	56
Outside dia. D (in)	2.2047
Width B (mm)	16
Width B (in)	0.6299
Overall width T (mm)	17.25
Overall width T (in)	0.6791
Cup width C (mm)	14
Cup width C (in)	0.5512

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	8320
Basic static load rating Cor (lbs)	8210
Limiting speed - grease (rpm)	7,160
Limiting speed - oil (rpm)	9,710

Weight

Weight (kg)	0.209

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.06
Shaft shoulder da min (in)	1.280
Housing shoulder Da max (in)	1.850
Shaft shoulder db max (in)	1.197

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 2,300 rpm
4	9,252	102	736
6	6,168	392	2,844
8	4,626	1,024	7,420
10	3,701	2,154	15,612
15	2,467	8,323	60,315

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 37,009 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
303/22	FAG	Tapered Roller	22	56	16	38 kN	0.21

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
63/22	NSK	Ball	22	56	16	20.2 kN	0.179
HR303/22C	NSK	Tapered Roller	22	56	16	7,760 lbs	0.2

Series variants (different suffix)

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
HR303/22C	NSK	Tapered Roller	22	56	16	7,760 lbs	0.2
HR303/28	NSK	Tapered Roller	28	68	18	12,400 lbs	0.34
HR303/28C	NSK	Tapered Roller	28	68	18	11,100 lbs	0.336
HR303/32	NSK	Tapered Roller	32	75	20	14,600 lbs	0.445
HR303/32C	NSK	Tapered Roller	32	75	20	13,400 lbs	0.445

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
HR302/22C	NSK	Tapered Roller	22	50	14	6,110 lbs	0.138
HR320/22XJ	NSK	Tapered Roller	22	44	15	25,600 lbs	0.104
HR322/22	NSK	Tapered Roller	22	50	18	8,210 lbs	0.181
HR322/22C	NSK	Tapered Roller	22	50	18	7,530 lbs	0.177
LM12749/LM12710	NSK	Tapered Roller	22	45.24	16.64	6,570 lbs	0.113
LM12749/LM12711	NSK	Tapered Roller	22	46	16.64	6,570 lbs	0.118
07087/07196	NSK	Tapered Roller	22.23	50.01	14.26	10,000 lbs	0.127
M12649/M12610	NSK	Tapered Roller	21.43	50.01	18.29	8,680 lbs	0.168

Request a quotation for HR303/22

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