51211NSKThrust

Name: NSK 51211 Thrust Bearing
Brand: NSK
SKU: 51211

51211 is a NSK thrust bearing, bore 55 mm, O.D. 90 mm, height 25 mm, dynamic rating 15,800 lbs. Dimensions, drawing, interchanges and price.

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Bore d55mm

Outside dia. D90mm

Overall width T25mm

Dynamic Cr15,800lbs

Static C0r35,700lbs

Limiting speed2,200rpm

Weight0.599kg

Cr / C0r0.44

Mean dia. dm72.5mm

Original catalogue drawing - NSK catalogue, page 145

51211 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	90	3.5433
T	Overall assembly width	25	0.9843

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)	90
Outside dia. D (in)	3.5433
Overall width T (mm)	25
Overall width T (in)	0.9843

Load ratings & speeds

Basic dynamic axial rating Ca (lbs)	15800
Basic static axial rating Coa (lbs)	35700
Limiting speed - grease (rpm)	2,200
Limiting speed - oil (rpm)	3,200

Weight

Weight (kg)	0.599

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.039
Shaft shoulder da min (in)	2.994
Housing shoulder Da (in)	2.719

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 700 rpm
4	17,570	102	2,419
6	11,714	392	9,345
8	8,785	1,024	24,381
10	7,028	2,154	51,296
15	4,685	8,323	198,178

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 70,282 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
51311	NSK	Thrust	55	105	35	26,000 lbs	1.311
51411	NSK	Thrust	55	120	48	40,800 lbs	2.581
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 51211

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