51208NSKThrust

Name: NSK 51208 Thrust Bearing
Brand: NSK
SKU: 51208

51208 is a NSK thrust bearing, bore 40 mm, O.D. 68 mm, height 19 mm, dynamic rating 10,600 lbs. Dimensions, drawing, interchanges and price.

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Bore d40mm

Outside dia. D68mm

Overall width T19mm

Dynamic Cr10,600lbs

Static C0r22,000lbs

Limiting speed2,800rpm

Weight0.27kg

Cr / C0r0.48

Mean dia. dm54mm

Original catalogue drawing - NSK catalogue, page 143

51208 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	40	1.5748
D	Outside diameter	68	2.6772
T	Overall assembly width	19	0.748

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)	40
Bore d (in)	1.5748
Outside dia. D (mm)	68
Outside dia. D (in)	2.6772
Overall width T (mm)	19
Overall width T (in)	0.7480

Load ratings & speeds

Basic dynamic axial rating Ca (lbs)	10600
Basic static axial rating Coa (lbs)	22000
Limiting speed - grease (rpm)	2,800
Limiting speed - oil (rpm)	4,300

Weight

Weight (kg)	0.27

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.039
Shaft shoulder da min (in)	2.246
Housing shoulder Da (in)	2.009

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 900 rpm
4	11,788	102	1,881
6	7,859	392	7,268
8	5,894	1,024	18,963
10	4,715	2,154	39,897
15	3,143	8,323	154,138

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 47,151 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.

Interchange - same dimensions, other brands

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
32008-X-XL	FAG	Tapered Roller	40	68	19	63 kN	0.28
32008-XA	FAG	Tapered Roller	40	68	19	52 kN	0.312
32008X	Timken	Tapered Roller	40	68	19	55.5 kN	0.27
X32008X/Y32008XZ	Timken	Tapered Roller	40	68	19	-	-
XAA32008X/Y32008X	Timken	Tapered Roller	40	68	19	55.5 kN	0.27

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
HR32008	NSK	Tapered Roller	40	68	19	65 kN	0.28
HR32008XJ	NSK	Tapered Roller	40	68	19	52,500 lbs	0.281

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
51108	NSK	Thrust	40	60	13	6,100 lbs	0.12
51308	NSK	Thrust	40	78	26	15,600 lbs	0.536
51408	NSK	Thrust	40	90	36	23,100 lbs	1.1
52308	NSK	Thrust	40	78	None	70 kN	1.13
52408	NSK	Thrust	40	90	None	103 kN	2.02
51107	NSK	Thrust	35	52	12	4,960 lbs	0.081
51207	NSK	Thrust	35	62	18	8,920 lbs	0.21
51307	NSK	Thrust	35	68	24	12,500 lbs	0.386

Request a quotation for 51208

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