HR303/32NSKTapered Roller

Name: NSK HR303/32 Tapered Roller Bearing
Brand: NSK
SKU: HR303/32

HR303/32 is a NSK tapered roller bearing, bore 32 mm, O.D. 75 mm, width 20 mm, dynamic rating 14,600 lbs. Dimensions, drawing, interchanges and price.

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Bore d32mm

Outside dia. D75mm

Width B20mm

Dynamic Cr14,600lbs

Static C0r15,600lbs

Limiting speed5,300rpm

Weight0.445kg

Cr / C0r0.94

Mean dia. dm53.5mm

Original catalogue drawing - NSK catalogue, page 107

HR303/32 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	32	1.2598
D	Outside diameter	75	2.9528
B	Inner-ring / bearing width	20	0.7874
T	Overall assembly width	21.75	0.8563
C	Cup / outer-ring width	17	0.6693

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)	32
Bore d (in)	1.2598
Outside dia. D (mm)	75
Outside dia. D (in)	2.9528
Width B (mm)	20
Width B (in)	0.7874
Overall width T (mm)	21.75
Overall width T (in)	0.8563
Cup width C (mm)	17
Cup width C (in)	0.6693

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	14600
Basic static load rating Cor (lbs)	15600
Limiting speed - grease (rpm)	5,300
Limiting speed - oil (rpm)	7,100

Weight

Weight (kg)	0.445

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.06
Shaft shoulder da min (in)	1.693
Housing shoulder Da max (in)	2.598
Shaft shoulder db max (in)	1.654

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 1,700 rpm
4	16,236	102	996
6	10,824	392	3,848
8	8,118	1,024	10,039
10	6,494	2,154	21,122
15	4,330	8,323	81,603

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 64,944 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
303/32	FAG	Tapered Roller	32	75	20	67 kN	0.464

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
63/32	NSK	Ball	32	75	20	33 kN	0.389
HR303/32C	NSK	Tapered Roller	32	75	20	13,400 lbs	0.445
HR322/32	NSK	Tapered Roller	32	75	20	12,600 lbs	0.336

Series variants (different suffix)

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
HR303/22	NSK	Tapered Roller	22	56	16	8,320 lbs	0.209
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
HR303/32C	NSK	Tapered Roller	32	75	20	13,400 lbs	0.445

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
HR302/32C	NSK	Tapered Roller	32	65	17	10,200 lbs	0.268
HR320/32XJ	NSK	Tapered Roller	32	58	17	37,500 lbs	0.191
HR322/32	NSK	Tapered Roller	32	75	20	12,600 lbs	0.336
HR322/32C	NSK	Tapered Roller	32	65	21	11,100 lbs	0.331
HR323/32C	NSK	Tapered Roller	32	75	28	19,000 lbs	0.621
14123A/14274	NSK	Tapered Roller	31.75	69.01	26.72	10,600 lbs	0.39
14125A/14276	NSK	Tapered Roller	31.75	69.01	19.58	10,600 lbs	0.349
15123/15245	NSK	Tapered Roller	31.75	62	19.05	10,400 lbs	0.236

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