51408NSKThrust

Name: NSK 51408 Thrust Bearing
Brand: NSK
SKU: 51408

51408 is a NSK thrust bearing, bore 40 mm, O.D. 90 mm, height 36 mm, dynamic rating 23,100 lbs. Dimensions, drawing, interchanges and price.

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Bore d40mm

Outside dia. D90mm

Overall width T36mm

Dynamic Cr23,100lbs

Static C0r42,100lbs

Limiting speed1,700rpm

Weight1.1kg

Cr / C0r0.55

Mean dia. dm65mm

Original catalogue drawing - NSK catalogue, page 143

51408 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	90	3.5433
T	Overall assembly width	36	1.4173

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)	90
Outside dia. D (in)	3.5433
Overall width T (mm)	36
Overall width T (in)	1.4173

Load ratings & speeds

Basic dynamic axial rating Ca (lbs)	23100
Basic static axial rating Coa (lbs)	42100
Limiting speed - grease (rpm)	1,700
Limiting speed - oil (rpm)	2,600

Weight

Weight (kg)	1.1

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.039
Shaft shoulder da min (in)	2.758
Housing shoulder Da (in)	2.364

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 500 rpm
4	25,688	102	3,386
6	17,126	392	13,083
8	12,844	1,024	34,133
10	10,275	2,154	71,814
15	6,850	8,323	277,449

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 102,754 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
51108	NSK	Thrust	40	60	13	6,100 lbs	0.12
51208	NSK	Thrust	40	68	19	10,600 lbs	0.27
51308	NSK	Thrust	40	78	26	15,600 lbs	0.536
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 51408

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