51409NSKThrust

Name: NSK 51409 Thrust Bearing
Brand: NSK
SKU: 51409

51409 is a NSK thrust bearing, bore 45 mm, O.D. 100 mm, height 39 mm, dynamic rating 28,600 lbs. Dimensions, drawing, interchanges and price.

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Bore d45mm

Outside dia. D100mm

Overall width T39mm

Dynamic Cr28,600lbs

Static C0r55,300lbs

Limiting speed1,600rpm

Weight1.46kg

Cr / C0r0.52

Mean dia. dm72.5mm

Original catalogue drawing - NSK catalogue, page 143

51409 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	45	1.7717
D	Outside diameter	100	3.937
T	Overall assembly width	39	1.5354

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)	45
Bore d (in)	1.7717
Outside dia. D (mm)	100
Outside dia. D (in)	3.9370
Overall width T (mm)	39
Overall width T (in)	1.5354

Load ratings & speeds

Basic dynamic axial rating Ca (lbs)	28600
Basic static axial rating Coa (lbs)	55300
Limiting speed - grease (rpm)	1,600
Limiting speed - oil (rpm)	2,400

Weight

Weight (kg)	1.46

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.039
Shaft shoulder da min (in)	3.073
Housing shoulder Da (in)	2.640

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 500 rpm
4	31,805	102	3,386
6	21,203	392	13,083
8	15,902	1,024	34,133
10	12,722	2,154	71,814
15	8,481	8,323	277,449

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 127,219 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
51109	NSK	Thrust	45	65	14	6,300 lbs	0.142
51209	NSK	Thrust	45	73	20	10,800 lbs	0.31
51309	NSK	Thrust	45	85	28	18,000 lbs	0.672
52209	NSK	Thrust	45	73	None	48 kN	0.652
52309	NSK	Thrust	45	85	None	80.5 kN	1.34
52409	NSK	Thrust	45	100	None	128 kN	2.85
51108	NSK	Thrust	40	60	13	6,100 lbs	0.12
51208	NSK	Thrust	40	68	19	10,600 lbs	0.27

Request a quotation for 51409

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