51203NSKThrust

Name: NSK 51203 Thrust Bearing
Brand: NSK
SKU: 51203

51203 is a NSK thrust bearing, bore 17 mm, O.D. 35 mm, height 12 mm, dynamic rating 3,880 lbs. Dimensions, drawing, interchanges and price.

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Bore d17mm

Outside dia. D35mm

Overall width T12mm

Dynamic Cr3,880lbs

Static C0r6,120lbs

Limiting speed4,800rpm

Weight0.05kg

Cr / C0r0.63

Mean dia. dm26mm

Original catalogue drawing - NSK catalogue, page 143

51203 NSK Thrust 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	17	0.6693
D	Outside diameter	35	1.378
T	Overall assembly width	12	0.4724

Notes

Thrust bearing ratings are axial values Ca / Coa; T is the overall height. 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)	35
Outside dia. D (in)	1.3780
Overall width T (mm)	12
Overall width T (in)	0.4724

Load ratings & speeds

Basic dynamic axial rating Ca (lbs)	3880
Basic static axial rating Coa (lbs)	6120
Limiting speed - grease (rpm)	4,800
Limiting speed - oil (rpm)	7,500

Weight

Weight (kg)	0.05

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.024
Shaft shoulder da min (in)	1.103
Housing shoulder Da (in)	0.946

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 1,600 rpm
4	4,315	102	1,058
6	2,877	392	4,089
8	2,157	1,024	10,667
10	1,726	2,154	22,442
15	1,151	8,323	86,703

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 17,259 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.145 (dimensions) / p.146 (ratings)

Dimensions in inches and millimetres, load ratings in lbs.

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
51103	NSK	Thrust	17	30	9	2,570 lbs	0.025
51102	NSK	Thrust	15	28	9	2,380 lbs	0.23
51202	NSK	Thrust	15	32	12	3,770 lbs	0.043
52202	NSK	Thrust	15	32	None	16.7 kN	0.09
51104	NSK	Thrust	20	35	10	3,390 lbs	0.037
51204	NSK	Thrust	20	40	14	5,040 lbs	0.077
52204	NSK	Thrust	20	40	None	22.5 kN	0.151
51101	NSK	Thrust	12	26	9	2,330 lbs	0.021

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