6203NSKBall

Name: NSK 6203 Ball Bearing
Brand: NSK
SKU: 6203

6203 is a NSK ball bearing, bore 17 mm, O.D. 40 mm, width 12 mm, dynamic rating 2,150 lbs. Dimensions, drawing, interchanges and price.

Request a quote WhatsApp Email us Search the catalog

Bore d17mm

Outside dia. D40mm

Width B12mm

Dynamic Cr2,150lbs

Static C0r1,080lbs

Limiting speed17,000rpm

Weight0.064kg

Cr / C0r1.99

Mean dia. dm28.5mm

Original catalogue drawing - NSK catalogue, page 17

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	17	0.6693
D	Outside diameter	40	1.5748
B	Inner-ring / bearing width	12	0.4724
r	Chamfer (min)	0.61	0.024

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)	17
Bore d (in)	0.6693
Outside dia. D (mm)	40
Outside dia. D (in)	1.5748
Width B (mm)	12
Width B (in)	0.4724

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	2150
Basic static load rating Cor (lbs)	1080
Limiting speed - grease (rpm)	17,000
Limiting speed - oil (rpm)	20,000
Factor f0	13.2

Weight

Weight (kg)	0.064

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.024
Shaft shoulder da min (in)	0.787
Shaft shoulder da max (in)	0.926
Housing shoulder Da max (in)	1.380

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 3,000 rpm
4	2,391	64	356
6	1,594	216	1,200
8	1,195	512	2,844
10	956	1,000	5,556
15	638	3,375	18,750

Basic rating life per ISO 281: L₁₀ = (C/P)³ with C = 9,564 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.19 (dimensions) / p.20 (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
1203-TVH	FAG	Ball	17	40	12	8.1 kN	0.073
6203	FAG	Ball	17	40	12	9.5 kN	0.065
6203-2RSR	FAG	Ball	17	40	12	9.5 kN	0.067
6203-2Z	FAG	Ball	17	40	12	9.5 kN	0.067
6203-C	FAG	Ball	17	40	12	10.4 kN	0.062
6203-C-2BRS	FAG	Ball	17	40	12	10.4 kN	0.065
6203-C-2HRS	FAG	Ball	17	40	12	10.4 kN	0.067
6203-C-2Z	FAG	Ball	17	40	12	10.4 kN	0.067
S6203	FAG	Ball	17	40	12	9.5 kN	0.065
S6203-2RSR	FAG	Ball	17	40	12	9.5 kN	0.067

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1203	NSK	Ball	17	40	12	1,800 lbs	0.073
7203B	NSK	Ball	17	40	12	2,090 lbs	0.068
HR30203	NSK	Tapered Roller	17	40	12	24.8 kN	0.079
HR30203J	NSK	Tapered Roller	17	40	12	4,520 lbs	0.077
7203	NSK	Precision / Angular Contact	17	40	12	11.9 kN	0.067
7203A5	NSK	Precision / Angular Contact	17	40	12	2,360 lbs	0.064
7203C	NSK	Precision / Angular Contact	17	40	12	2,450 lbs	0.064

Series variants (different suffix)

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
6203-625	NSK	Ball	15.9	40	12	2,150 lbs	0.064

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1203	NSK	Ball	17	40	12	1,800 lbs	0.073
1303	NSK	Ball	17	47	14	2,810 lbs	0.136
16003	NSK	Ball	17	35	8	6.6 kN	0.033
2203	NSK	Ball	17	40	16	2,200 lbs	0.086
2303	NSK	Ball	17	47	19	3,210 lbs	0.177
3203J	NSK	Ball	17	40	17.5	2,880 lbs	0.104
3303J	NSK	Ball	17	47	22.2	4,520 lbs	0.191
5203J	NSK	Ball	17	40	17.5	3,290 lbs	0.091

Request a quotation for 6203

Send us the quantity you need and we will come back with price and lead time, normally within 24 hours. Equivalent parts from other brands can be quoted at the same time.

Online enquiry form richard@bearingsfit.com WhatsApp +86 156 2149 6516