51411NSKThrust

Name: NSK 51411 Thrust Bearing
Brand: NSK
SKU: 51411

51411 is a NSK thrust bearing, bore 55 mm, O.D. 120 mm, height 48 mm, dynamic rating 40,800 lbs. Dimensions, drawing, interchanges and price.

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Bore d55mm

Outside dia. D120mm

Overall width T48mm

Dynamic Cr40,800lbs

Static C0r78,300lbs

Limiting speed1,300rpm

Weight2.581kg

Cr / C0r0.52

Mean dia. dm87.5mm

Original catalogue drawing - NSK catalogue, page 145

51411 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	55	2.1654
D	Outside diameter	120	4.7244
T	Overall assembly width	48	1.8898

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)	55
Bore d (in)	2.1654
Outside dia. D (mm)	120
Outside dia. D (in)	4.7244
Overall width T (mm)	48
Overall width T (in)	1.8898

Load ratings & speeds

Basic dynamic axial rating Ca (lbs)	40800
Basic static axial rating Coa (lbs)	78300
Limiting speed - grease (rpm)	1,300
Limiting speed - oil (rpm)	1,900

Weight

Weight (kg)	2.581

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.059
Shaft shoulder da min (in)	3.704
Housing shoulder Da (in)	3.191

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 400 rpm
4	45,372	102	4,233
6	30,248	392	16,354
8	22,686	1,024	42,667
10	18,149	2,154	89,768
15	12,099	8,323	346,811

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 181,487 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.147 (dimensions) / p.148 (ratings)

Dimensions in inches and millimetres, load ratings in lbs.

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
51111	NSK	Thrust	55	78	16	7,940 lbs	0.227
51211	NSK	Thrust	55	90	25	15,800 lbs	0.599
51311	NSK	Thrust	55	105	35	26,000 lbs	1.311
52311	NSK	Thrust	55	105	None	115 kN	2.7
52411	NSK	Thrust	55	120	None	181 kN	4.68
51110	NSK	Thrust	50	70	14	6,530 lbs	0.154
51210	NSK	Thrust	50	78	22	11,000 lbs	0.376
51310	NSK	Thrust	50	95	31	21,900 lbs	0.93

Request a quotation for 51411

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